This was involved with the following buildings or structures from the date specified (click on an item to view details): |
| Date started | Building name | Town, district or village | Island | City or county | Country | Notes |
| | Alvah School | Alvah | | Banffshire | Scotland | Date unknown |
| | Auchterless Female School | Auchterless | | Aberdeenshire | Scotland | Date unknown |
| | Chalmers School | Turriff | | Aberdeenshire | Scotland | Additions - date unknown |
| | Hall at Aberchirder | Aberchirder | | Banffshire | Scotland | Date unknown |
| | Marnoch School | Marnoch | | Banffshire | Scotland | Date unknown |
| 1860s | Ardmiddle Middle House and Labourers Cottage | Ardmiddle | | Aberdeenshire | Scotland | |
| 1860s | Macduff Teacher's House | Macduff | | Banffshire | Scotland | |
| c. 1860 | Ardmiddle Dwelling House | Ardmiddle | | Aberdeenshire | Scotland | |
| c. 1860 | Auchinbadie Steading | Mountblairy | | Banffshire | Scotland | |
| c. 1860 | Brownside Dwelling House | | | | Scotland | |
| c. 1860 | Conland Mill, Dwelling House | Bognie | | Morayshire | Scotland | |
| c. 1860 | Conland Teacher's Residence | Conland | | Aberdeenshire | Scotland | |
| c. 1860 | Dwelling house for blacksmith and cottages | Dunlugas | | Banffshire | Scotland | |
| c. 1860 | Ewebrae Dwelling House and Steading | Hatton | | Aberdeenshire | Scotland | |
| c. 1860 | Gamrie Manse | Gamrie | | Banffshire | Scotland | Original building - possibly responsible? |
| c. 1860 | Holymill Dwelling House | Craigston | | Aberdeenshire | Scotland | |
| c. 1860 | Itlaw Blacksmith's House | Mountblairy | | Banffshire | Scotland | |
| c. 1860 | Lendrum Steading, Dwelling House and Blacksmith's House | Hatton | | Aberdeenshire | Scotland | |
| c. 1860 | Mountblairy Cottage | Mountblairy | | Banffshire | Scotland | |
| c. 1860 | Mountblairy Gardener's Cottage | Mountblairy | | Banffshire | Scotland | Cottage with alterations |
| c. 1860 | Newton of Mountblairy Stable, Steading, Cottage and House | Mountblairy | | Banffshire | Scotland | New buildings and alterations to house |
| c. 1860 | Rosieburn Steading and Dwelling House | | | Banffshire? | Scotland | |
| c. 1860 | South Tarwathie Dwelling House | Strichen | | Aberdeenshire | Scotland | |
| c. 1860 | Woodhead Dwelling House and Steading | Delgaty | | Aberdeenshire | Scotland | |
| 1862 | Cuminestown School | Cuminestown | | Aberdeenshire | Scotland | |
| 1864 | Auchterless Parish Churchyard | Auchterless | | Aberdeenshire | Scotland | Alterations |
| 1865 | Turriff Market Cross | Turriff | | Aberdeenshire | Scotland | |
| 1866 | Eliza Villa | Turriff | | Aberdeenshire | Scotland | |
| 1866 | Ladies' Seminary | Turriff | | Aberdeenshire | Scotland | |
| 1866 | Young Men's Christian Association Hall, Seafield Street | Banff | | Banffshire | Scotland | |
| 1868 | Fisherford Farm | Auchterless | | Aberdeenshire | Scotland | |
| 1868 | Viewfield House | Turriff | | Aberdeenshire | Scotland | |
| 1868 | Ythanwells Manse | Ythanwells | | Aberdeenshire | Scotland | New building? |
| c. 1870 | Aberdour House | | | Aberdeenshire | Scotland | |
| c. 1870 | Ardfour, Steading and Dwelling House | Netherdale | | Aberdeenshire | Scotland | |
| c. 1870 | Ardmiddle House | | | Aberdeenshire | Scotland | Barnyards and wash house, house, iron railings, gas house, larder, coachman's house, washing house |
| c. 1870 | Avaulds, Dwelling House and Steading | Troup | | Aberdeenshire | Scotland | |
| c. 1870 | Backhill, Bourtrie Dwelling House | Balcairn | | Aberdeenshire | Scotland | |
| c. 1870 | Backmill, Dwelling House and Steading | Backmill | | Aberdeenshire | Scotland | |
| c. 1870 | Bainsholes, Dwelling House | Bognie? | | Aberdeenshire? | Scotland | |
| c. 1870 | Balquhindachy Sabbath School | Monquhitter / Montquhitter | | Aberdeenshire | Scotland | |
| c. 1870 | Balquhindachy, Steading, Dwelling House and Cottar House | Delgaty | | Aberdeenshire | Scotland | |
| c. 1870 | Barnyards | Auchry | | Aberdeenshire | Scotland | |
| c. 1870 | Barnyards of Forglen, Steading | Forglen | | Banffshire | Scotland | |
| c. 1870 | Broadgreens, Steading and Dwelling House | Broadgreens | | Aberdeenshire | Scotland | |
| c. 1870 | Comisty, House and Steading | Comisty, Bognie | | Aberdeenshire | Scotland | |
| c. 1870 | Commercial Hotel | New Byth / Newbyth | | Aberdeenshire | Scotland | |
| c. 1870 | Conland, Steading | Bognie | | Aberdeenshire | Scotland | |
| c. 1870 | Corse House, Steading , Cottage | Netherdale/Corse | | Aberdeenshire | Scotland | |
| c. 1870 | Cottage, Auchterless, Kirkton | Auchterless | | Aberdeenshire | Scotland | |
| c. 1870 | Cottage, Combsburn | Ardmiddle | | Aberdeenshire | Scotland | |
| c. 1870 | Cuminestown, Dwelling Houses | Cuminestown | | Aberdeenshire | Scotland | |
| c. 1870 | Cushnie, Warehouse | Troup | | Aberdeenshire | Scotland | |
| c. 1870 | Daviot Manse | Daviot | | Aberdeenshire | Scotland | Alterations? |
| c. 1870 | Denhead of Dunlugas, Dwelling House | Dunlugas | | Banffshire | Scotland | |
| c. 1870 | Dubford, Steading, Enclosing Wall , Shed and Pens | Dorlaithers | | Aberdeenshire | Scotland | |
| c. 1870 | Dykeside, Cottage, Blacksmith's Crift, Blacksmith's Shop, Cottages and Houses | Towie | | Aberdeenshire | Scotland | |
| c. 1870 | Forglen Free Church | Kirkton of Forglen | | Banffshire | Scotland | Alterations |
| c. 1870 | Foveran, Gardener's Cottage | Pitglassie | | Morayshire | Scotland | |
| c. 1870 | Greenskares Home Farm, Cottage, Steading | Greenskares | | Aberdeenshire | Scotland | |
| c. 1870 | Gunhill Steading | Balcairn | | Aberdeenshire | Scotland | |
| c. 1870 | Haughs, Steading | Forglen | | Banffshire | Scotland | |
| c. 1870 | Housing, Chapel Street | Turriff | | Aberdeenshire | Scotland | |
| c. 1870 | Kirkland, Forgue, Dwelling House | Bognie | | Aberdeenshire/Morayshire | Scotland | |
| c. 1870 | Leggatsden Dwelling House and Steading | Balcairn | | Aberdeenshire | Scotland | |
| c. 1870 | Little Blackpots, Dwelling House | Kinaldie | | Aberdeenshire | Scotland | |
| c. 1870 | Mains of Idoch, Dwelling House and Steading | Delgaty | | Aberdeenshire | Scotland | |
| c. 1870 | Mains of Inveramsay cottage | Balcairn | | Aberdeenshire | Scotland | |
| c. 1870 | Mains of Pittendreigh, Steading and Water Supply | Netherdale | | Aberdeenshire | Scotland | |
| c. 1870 | Mains of Thornton Dwelling House | Balcairn | | Aberdeenshire | Scotland | |
| c. 1870 | Maryfield House, Bothy etc | Glenesk | | Angus | Scotland | |
| c. 1870 | Meadowbank, Dwelling House | Forglen | | Banffshire | Scotland | |
| c. 1870 | Mill of Delgaty, Steading | Delgaty | | Aberdeenshire | Scotland | |
| c. 1870 | Mill of Muiresk, Blacksmith's House and Dwelling House | Muiresk | | Aberdeenshire | Scotland | |
| c. 1870 | Monelly, Steading, Cottage | Netherdale | | Aberdeenshire | Scotland | |
| c. 1870 | Murray's Croft, Houses | Forglen | | Banffshire | Scotland | |
| c. 1870 | Nether Ordley, Blacksmith's Shop, Steading and Housing | Towie | | Aberdeenshire | Scotland | |
| c. 1870 | Newmachar, Steading | Newmachar, Elrick | | Aberdeenshire | Scotland | |
| c. 1870 | North Braeside, Dwelling House | Netherside | | Caithness? | Scotland | |
| c. 1870 | Pitgair, Steading and Dwelling House | Troup | | Aberdeenshire | Scotland | |
| c. 1870 | Pitgaveny Steading and Dwelling House | Balcairn | | Aberdeenshire | Scotland | |
| c. 1870 | Quarryhill, Dwelling House, Steading | Clunie | | Aberdeenshire | Scotland | Alterations to dwelling house and steading |
| c. 1870 | Reshivit North, Dwelling House | Balcairn | | Aberdeenshire | Scotland | |
| c. 1870 | Roberton, Dwelling House | Mountblairy | | Banffshire | Scotland | |
| c. 1870 | Rosieburn, Steading | Bognie | | Aberdeenshire | Scotland | |
| c. 1870 | Scotston, Dwelling House | Mountblairy | | Banffshire | Scotland | |
| c. 1870 | Swailend, Dwelling House | Swailend, Elrick | | Aberdeenshire | Scotland | |
| c. 1870 | Tollybrae, Steading and Dwelling House | Kinaldie | | Aberdeenshire | Scotland | |
| c. 1870 | Upper Crannabog, Steading | Mountblairy | | Banffshire | Scotland | |
| c. 1870 | Villa, Pilmuir | Forres | | Morayshire | Scotland | |
| c. 1870 | Westerton, by Ellon (?), Dwelling House | Balcairn | | Aberdeenshire | Scotland | |
| c. 1870 | Woodend, Thornton, Stable and Millhouse | Balcairn | | Aberdeenshire | Scotland | |
| c. 1870V | Hillhead of Ardmiddle, Dwelling House and Millhose | Ardmiddle | | Aberdeenshire | Scotland | |
| 1871 | Auchterless Manse | Auchterless | | Aberdeenshire | Scotland | Alterations |
| 1872 | Bethelnie Steading | Meldrum | | Aberdeenshire | Scotland | |
| 1872 | Bilbo Farm House | Auchterless | | Aberdeenshire | Scotland | |
| 1872 | Cowley Farm House | Auchterless | | Aberdeenshire | Scotland | |
| 1872 | Forglen Manse | Forglen | | Banffshire | Scotland | |
| 1872 | South Bodichell | | | Kincardineshire? | Scotland | |
| 1873 | Towie Barclay Castle | | | Aberdeenshire | Scotland | Alterations and partial reconstruction - east gable, upper floor of wing and battlemented parapet with bartizans |
| 1873 | Town and County Bank | Turriff | | Aberdeenshire | Scotland | |
| 1874 | City of Glasgow Bank | Banff | | Banffshire | Scotland | Plans drawn up. Duncan was executant architect |
| 1874 | Forgue School | Forgue | | Aberdeenshire | Scotland | |
| c. 1874 | Towie Barclay Castle | | | Aberdeenshire | Scotland | Courtyard steading - reconstructed in its present form. |
| 1875 | Houses at Backhill, Laveldside, Thornton | Backhill | | Aberdeenshire? | Scotland | |
| 1875 | Monquhitter Manse | Cuminestown | | Aberdeenshire | Scotland | Further alterations and interior remodelled |
| 1875 | Turriff Parish Church | Turriff | | Aberdeenshire | Scotland | Alterations - including reconstruction after removal of organ chamber and session room |
| 1875 | Ythanwells School | Ythanwells | | Aberdeenshire | Scotland | |
| 1876 | Barnyards at Hatton Castle | Turriff | | Aberdeenshire | Scotland | Alterations |
| 1876 | Corse School | Corse | | Aberdeenshire | Scotland | With Leo Duguid |
| 1876 | Forglen School | Forglen | | Banffshire | Scotland | |
| 1877 | Birkenhills School | Birkenhills | | Aberdeenshire | Scotland | |
| 1877 | Daviot Manse | Daviot | | Aberdeenshire | Scotland | Alterations - addition of two red sandstone bays |
| 1877 | Fintry School | Fintry | | Aberdeenshire | Scotland | |
| c. 1877 | Gamrie Parish Church | Gamrie | | Banffshire | Scotland | Alterations |
| 1878 | Aberdeen Town and County Bank | Fochabers | | Morayshire | Scotland | |
| 1878 | Bourtie School | | | Aberdeenshire | Scotland | |
| 1878 | Commercial Bank of Scotland | Turriff | | Aberdeenshire | Scotland | Plans and execution of alterations and additions |
| 1878 | South Dorlaithers | Dorlaithers | | Aberdeenshire | Scotland | |
| 1878 | Swailend | New Machar | | Aberdeenshire | Scotland | |
| 1879 | Cowland Steading | Forgue | | Aberdeenshire | Scotland | |
| 1879 | Fyvie Cottage Hospital | Fyvie | | Aberdeenshire | Scotland | |
| 1880 | Garrick Cottage, Hatton Castle | Turriff | | Aberdeenshire | Scotland | |
| 1880 | Little Brownhill, Hatton Castle | Turriff | | Aberdeenshire | Scotland | |
| c. 1880 | Aberdeen Town and County Bank | Banff | | Banffshire | Scotland | |
| c. 1880 | Ardconnan, Rush, Dwelling House and Steading | Meldrum | | Aberdeenshire | Scotland | |
| c. 1880 | Arkland, Dwelling House and Steading | Clunie | | Aberdeenshire | Scotland | |
| c. 1880 | Auchaber Home Farm, Steading and House | Auchaber | | Aberdeenshire | Scotland | |
| c. 1880 | Auchinhamper, Mill House, Steading, Double Cottage, House Alterations | Netherdale | | Aberdeenshire | Scotland | |
| c. 1880 | Auchnacorth and Braeside, Dwelling House and Steading | Meldrum | | Aberdeenshire | Scotland | |
| c. 1880 | Backhill of Cluny, Dwelling House and Steading | Clunie | | Aberdeenshire | Scotland | |
| c. 1880 | Backhill of Thomastown, Steading | Towie | | Aberdeenshire | Scotland | |
| c. 1880 | Bairnsdale Farm Steading | Fyvie | | Aberdeenshire | Scotland | |
| c. 1880 | Balgaveny Millhouse, Mill House | Balgaveny | | Aberdeenshire | Scotland | |
| c. 1880 | Bath House | Banff | | Banffshire | Scotland | |
| c. 1880 | Blacksmith's Shop, Dwelling House, Cottage Alterations, Steading | Fortrie | | Aberdeenshire | Scotland | |
| c. 1880 | Bodiechell, Steading and Office | Netherdale/ Muirs of Fyvie | | Aberdeenshire | Scotland | |
| c. 1880 | Boggiehead, Dwelling House | Mountblairy | | Banffshire | Scotland | |
| c. 1880 | Boghead Steading | Ardmiddle | | Aberdeenshire | Scotland | |
| c. 1880 | Bogniebrae | Forgue | | Aberdeenshire | Scotland | Also hotel alterations |
| c. 1880 | Breedless, Steading and Dwelling House | Dunlugas | | Banffshire | Scotland | |
| c. 1880 | Burnside of Largue, Dwelling House | Bognie | | Aberdeenshire | Scotland | |
| c. 1880 | Castlehill, Millhouse | Clunie | | Aberdeenshire | Scotland | |
| c. 1880 | Chalmers, Cottages and Steading | Feithill | | Aberdeenshire | Scotland | |
| c. 1880 | Claymires, Steading and Cottage | Forglen | | Banffshire | Scotland | |
| c. 1880 | Cliftbog, Stable, Cart Sheds, Dwelling House and Dairy | Pitglassie | | Morayshire | Scotland | |
| c. 1880 | Clifton Cottage and Stable for Dr Hay | Forgue | | Aberdeenshire | Scotland | |
| c. 1880 | Cobblehouse, Dwelling House | Netherdale | | Aberdeenshire | Scotland | |
| c. 1880 | Collyne, Dwelling House | Bognie | | Morayshire? | Scotland | |
| c. 1880 | Corsehill, Steading, Mill House and Dwelling House | Corsehill | | Aberdeenshire | Scotland | |
| c. 1880 | Creel's Well, Steading and Dwelling House | Netherdale | | Aberdeenshire | Scotland | |
| c. 1880 | Cuminestown Manse | Cuminestown | | Aberdeenshire | Scotland | |
| c. 1880 | Cuminestown, House and Shop | Cuminestown | | Aberdeenshire | Scotland | |
| c. 1880 | Denhead of Auchaber, Steading and House | Auchaber | | Aberdeenshire | Scotland | |
| c. 1880 | Denmoss, Steading and House | Auchaber | | Aberdeenshire | Scotland | |
| c. 1880 | Dundee, Steading and Dwelling House | Clunie | | Aberdeenshire | Scotland | |
| c. 1880 | East Tulloch, Steadings and Dwelling House | Blervie | | Morayshire | Scotland | |
| c. 1880 | Farm Steading and Dwelling House | Backhill of Kingoodie | | Perthshire | Scotland | |
| c. 1880 | Forgue Parish Church and Graveyard | Forgue | | Aberdeenshire | Scotland | Work on church |
| c. 1880 | Frendraught, Gamekeepers Cottage | Frendraught | | Aberdeenshire | Scotland | |
| c. 1880 | Fyvie Castle and ancillary buildings | Fyvie | | Aberdeenshire | Scotland | Bothy and game larder, two cottages, bowling alley and racquet courts, Seton Room (Duncan may have been executant architect for John Bryce) |
| c. 1880 | Gariochsburn, Dwelling House and Steading | Gariochsburn | | Aberdeenshire | Scotland | |
| c. 1880 | Greenskares, Blacksmith's Cottage, Steading, Mill | Greenskares | | Aberdeenshire | Scotland | |
| c. 1880 | Haremoss Croft, Steading | Cobairdy | | Aberdeenshire | Scotland | |
| c. 1880 | Heatherybanks, Steading Additiond and Dwelling House | Heatherybanks, Hatton | | Aberdeenshire | Scotland | |
| c. 1880 | Hill of Blair, Dwelling house and Steading | Blairgowrie? | | Perthshire? | Scotland | Alterations |
| c. 1880 | Hill of Mountblairy, Dwelling House | Mountblairy | | Banffshire | Scotland | |
| c. 1880 | House and bungalow for Alexander Hay | Lower Cotburn, Turriff | | Aberdeenshire | Scotland | |
| c. 1880 | House and offices for Mr Rennie | Cuminestown | | Aberdeenshire | Scotland | |
| c. 1880 | House for Miss Ogston | Braefoot | | Aberdeenshire | Scotland | |
| c. 1880 | Howff, Steading and Mill House | Howff | | Perthshire? | Scotland | |
| c. 1880 | Kebbholes, Dwelling House and Steading | Mountblairy | | Banffshire | Scotland | |
| c. 1880 | Kinaldie, Byre, Mill House, Steading, Offices | Kinaldie | | Aberdeenshire | Scotland | |
| c. 1880 | King Edward Church Hall | Glencairn | | Aberdeenshire | Scotland | |
| c. 1880 | Lambshillock, House and Farm Steading | Lambshillock | | Aberdeenshire | Scotland | |
| c. 1880 | Lescraigie, Steading, Dwelling House and Hen House | Lescraigie, Hatton | | Aberdeenshire | Scotland | |
| c. 1880 | Lightnot Dwelling House and Farm Steading | Balcairn Estate | | Aberdeenshire | Scotland | |
| c. 1880 | Little Ribrae, Steading | Forglen | | Banffshire | Scotland | |
| c. 1880 | Lower Deuchries, dwelling house | Forglen | | Banffshire | Scotland | |
| c. 1880 | Mains of Craigton, Steading and Dwelling House | Craigton | | Glasgow | Scotland | |
| c. 1880 | Mains of Frendraught, Steading | Frendraught | | Aberdeenshire | Scotland | |
| c. 1880 | Middle Muirden, Dwelling House | Dunlugas | | Banffshire | Scotland | |
| c. 1880 | Mill of Eastertown, Dwelling House | Fyvie | | Aberdeenshire | Scotland | |
| c. 1880 | Monkshill, Dwelling House and Steading | Monkshill | | Aberdeenshire | Scotland | |
| c. 1880 | Montcoffer, Mains | Montcoffer | | Aberdeenshire | Scotland | |
| c. 1880 | Mountblairy Home Farm, Steading | Mountblairy | | Banffshire | Scotland | |
| c. 1880 | Netherton, Steading | Delgaty | | Aberdeenshire | Scotland | |
| c. 1880 | Newton of Clunie, Sleeping Place and Covered Dung Pit | Clunie | | Aberdeenshire | Scotland | |
| c. 1880 | Placemill, Farm Steading and Dwelling House | Bognie | | Morayshire | Scotland | |
| c. 1880 | Redbriggs, Steading, Dwelling House Alterations | Redbriggs, Hatton | | Aberdeenshire | Scotland | |
| c. 1880 | Rivehill, Dwelling House | Greenskares | | Aberdeenshire | Scotland | |
| c. 1880 | Silverwells, Cottage and Farm Buildings | Silverwells | | Aberdeenshire | Scotland | |
| c. 1880 | Sourbank, Dwelling House, Cottage and Straw Shed | Blervie | | Morayshire | Scotland | |
| c. 1880 | South Auchtylair, Steading | Kinaldie | | Aberdeenshire | Scotland | |
| c. 1880 | Steading | Newton of Fortrie | | Aberdeenshire | Scotland | |
| c. 1880 | Steading and Dwelling House | Auchnagorth | | Aberdeenshire | Scotland | |
| c. 1880 | Strath of Tulloch, Steading and Dwelling House | Tulloch | | Aberdeenshire/Morayshire? | Scotland | |
| c. 1880 | Tappacks, Steading, Water Supply and Dwelling House | Netherdale | | Aberdeenshire | Scotland | |
| c. 1880 | Thomastown, Steading | Towie | | Aberdeenshire | Scotland | |
| c. 1880 | Tippercowan, Steading and Dwelling House | Meldrum | | Aberdeenshire | Scotland | |
| c. 1880 | Turriff Central Auction Mart | Turriff | | Aberdeenshire | Scotland | |
| c. 1880 | Turriff Manse | Turriff | | Aberdeenshire | Scotland | |
| c. 1880 | Upper Ashalloch, Dwelling House and Farm Steading | Bognie | | Morayshire | Scotland | |
| c. 1880 | Upper Tillymauld, Steading and Dwelling House | Meldrum | | Aberdeenshire | Scotland | |
| c. 1880 | Upperton, House and Farm Steading | Upperton | | Aberdeenshire | Scotland | |
| c. 1880 | Villa in Sandy Hill Road | Banff | | Banffshire | Scotland | |
| c. 1880 | West Pitdoulzie, Byre, Steading, Double Cottage | Towie | | Aberdeenshire | Scotland | |
| c. 1880 | Westerton, Forgue, Dwelling House and Steading | Forgue, Bognie | | Aberdeenshire | Scotland | |
| c. 1880 | Whiterashes, Tifty, Dwelling House | Whiterashes | | Aberdeenshire | Scotland | |
| c. 1880 | Willings, Steading | Meldrum | | Aberdeenshire | Scotland | |
| c. 1880 | Yonderbognie, Steading | Bognie | | Aberdeenshire | Scotland | |
| 1881 | Steading Laverside | Bourtie | | Aberdeenshire | Scotland | |
| 1882 | Alvah Church | Kirkton of Alvah | | Banffshire | Scotland | Alterations - west porch and north east vestry. |
| 1883 | Culvie School | Marnoch | | Banffshire | Scotland | |
| 1883 | King Edward Manse | Glencairn | | Aberdeenshire | Scotland | |
| c. 1884 | Marnoch Parish Church | Marnoch | | Banffshire | Scotland | Alterations |
| c. 1884 | Marnoch Parish Manse | Marnoch | | Banffshire | Scotland | Alterations |
| 1886 | St Margaret's Episcopal Church | Forgue | | Aberdeenshire | Scotland | Spire lucarnes added |
| 1887 | Forgue Manse | Forgue | | Aberdeenshire | Scotland | Alterations |
| 1888 | Panton House | Turriff | | Aberdeenshire | Scotland | Additions |
| 1889 | Drachlaw, Steading and Dwelling House | Clunie | | Aberdeenshire | Scotland | Alterations |
| 1889 | Monquhitter Manse | Cuminestown | | Aberdeenshire | Scotland | Further work - Further alterations and interior remodelled |
| 1889 | Ord Church | Ord? | | Banffshire | Scotland | Alterations and additions |
| 1889 | Ord Manse | Ord? | | Banffshire | Scotland | Alterations and additions |
| 1890s | Burnside, Steading | Blervie | | Morayshire | Scotland | |
| 1890s | Culvie School | Marnoch | | Banffshire | Scotland | Additions |
| 1890s | Marnoch Parish Church Hall | Marnoch | | Banffshire | Scotland | |
| 1890s | Turriff Higher Grade School (and later Academy) | Turriff | | Aberdeenshire | Scotland | |
| 1890s | Turriff Parish Church | Turriff | | Aberdeenshire | Scotland | Alterations |
| 1890s | Turriff Parish Church Hall (St Ninian's) | Turriff | | Aberdeenshire | Scotland | |
| 1890 | King Edward Church | Glencairn | | Aberdeenshire | Scotland | Alterations and additions |
| c. 1890 | Aberchirder, House | Aberchirder | | Banffshire | Scotland | |
| c. 1890 | Aberchirder, Houses | Aberchirder | | Banffshire | Scotland | |
| c. 1890 | Aberchirder, Shop for Mr Wilson | Aberchirder | | Banffshire | Scotland | |
| c. 1890 | Alvah, Cottage for Mr Todd | Alvah | | Banffshire | Scotland | |
| c. 1890 | Auchninna, Steading | Netherdale | | Aberdeenshire | Scotland | Alterations |
| c. 1890 | Backhill of Corse, Dwelling House and Steading | Netherdale/Corse | | Aberdeenshire | Scotland | |
| c. 1890 | Backsmiddy, Steading and dwelling House | Hatton | | Aberdeenshire | Scotland | |
| c. 1890 | Badenscoth School | Badenscoth | | Aberdeenshire | Scotland | |
| c. 1890 | Badenscoth Schoolhouse | Badenscoth | | Aberdeenshire | Scotland | |
| c. 1890 | Balgaveny, Farm Steading and Dwelling House | Balgaveny | | Aberdeenshire | Scotland | |
| c. 1890 | Barrbank, Dwelling House and Steading | Haddo | | Aberdeenshire | Scotland | |
| c. 1890 | Blackford, House | Westfield | | Aberdeenshire | Scotland | |
| c. 1890 | Blervie Castle, Farm Buildings | Blervie | | Morayshire | Scotland | |
| c. 1890 | Blockhouse, Steading | Blair | | Aberdeenshire? | Scotland | |
| c. 1890 | Boghead, Steading and Dwelling House | Haddo | | Aberdeenshire | Scotland | |
| c. 1890 | Braefoot, Steading | Clunie | | Aberdeenshire | Scotland | |
| c. 1890 | Braehead of Largue, Steading | Auchaber | | Aberdeenshire | Scotland | |
| c. 1890 | Braehead Steading | Fyvie | | Aberdeenshire | Scotland | |
| c. 1890 | Braeside of Knockorth, Steading | Clunie | | Aberdeenshire | Scotland | |
| c. 1890 | Braich, Dwelling House | Blervie | | Morayshire | Scotland | |
| c. 1890 | Brokenfolds, Steading and Stable Wing | Netherdale | | Aberdeenshire | Scotland | |
| c. 1890 | Brownhill Steading and Cattle Court | Fyvie | | Aberdeenshire | Scotland | |
| c. 1890 | Carnousie House and Lodge | Carnousie | | Banffshire | Scotland | Additions to house and new lodge |
| c. 1890 | Carnousie, Cottage | Carnousie | | Banffshire | Scotland | |
| c. 1890 | Castlehill, Dwelling House | Blervie | | Morayshire | Scotland | |
| c. 1890 | Castlehill, Steading | Teuchar | | Aberdeenshire | Scotland | |
| c. 1890 | Cottage for Adam Mackie | Fyvie | | Aberdeenshire | Scotland | |
| c. 1890 | Craignetherty, Steading and Farmhouse | Craignetherty, Netherdale | | Aberdeenshire | Scotland | |
| c. 1890 | Cuminestown Central School | Cuminestown | | Aberdeenshire | Scotland | |
| c. 1890 | Downies, Steading, Stable, Byre and House | Haddo | | Aberdeenshire | Scotland | New buildings and alterations to house |
| c. 1890 | Dwelling House, Steading and Offices | Carlincraig | | Aberdeenshire | Scotland | |
| c. 1890 | Dwelling House, Steading and Offices | Tollo | | Aberdeenshire | Scotland | |
| c. 1890 | East Backhill, Steading and Dwelling House | Monkshill | | Aberdeenshire | Scotland | |
| c. 1890 | Fingask, Dwelling House and Labourers' Cottages | Fingask | | Aberdeenshire/Perthshire | Scotland | |
| c. 1890 | Forglen Mausoleum | Forglen | | Banffshire | Scotland | Repairs |
| c. 1890 | Forglen Parish Church | Forglen | | Banffshire | Scotland | Alterations |
| c. 1890 | Glassaugh House, with lodge and bridge | Glassaugh | | Banffshire | Scotland | |
| c. 1890 | Gourdas, Steading and Farmhouse | Fyvie | | Aberdeenshire | Scotland | |
| c. 1890 | Granary, Farm Steading | Blervie | | Morayshire | Scotland | |
| c. 1890 | Greeness School | Monquhitter / Montquhitter | | Aberdeenshire | Scotland | |
| c. 1890 | Greystone of Kingoodie, Steading | Blair | | Aberdeenshire? | Scotland | |
| c. 1890 | Gushetbog, Dwelling House and Steading | Haddo | | Aberdeenshire | Scotland | |
| c. 1890 | Hilton Blacklaw, Dwelling House and Steading | Haddo | | Aberdeenshire | Scotland | |
| c. 1890 | House | New Byth / Newbyth | | Aberdeenshire | Scotland | |
| c. 1890 | House for Mr James Milne | New Byth / Newbyth | | Aberdeenshire | Scotland | |
| c. 1890 | Kempfield, Dwelling House and Steading | Haddo | | Aberdeenshire | Scotland | |
| c. 1890 | Kirkton of Auchterless Male School | Auchterless | | Aberdeenshire | Scotland | |
| c. 1890 | Ladybank, Steading Dwelling House and Poultry Shed | Haddo | | Aberdeenshire | Scotland | |
| c. 1890 | Largue, Steading | Auchaber | | Aberdeenshire | Scotland | |
| c. 1890 | Mahon, Dwelling House and Steading | Muiresk | | Aberdeenshire | Scotland | |
| c. 1890 | Mains of Balmaud, Steading | Balmaud | | Aberdeenshire | Scotland | |
| c. 1890 | Mains of Crombie, Steading, Dwelling House and Byre Wing | Haddo | | Aberdeenshire | Scotland | |
| c. 1890 | Mains of Knockorth, Steading and Dwelling House | Clunie | | Aberdeenshire | Scotland | |
| c. 1890 | Mains of Marcassie, Dwelling House and Steading | Blervie | | Morayshire | Scotland | |
| c. 1890 | Meiklefolla, House and Offices on croft | Smiddyseat | | | Scotland | |
| c. 1890 | Midmore, Dwelling House and Steading | Haddo | | Aberdeenshire | Scotland | |
| c. 1890 | Mill of Kingoodie, Steading | Blair | | Aberdeenshire? | Scotland | |
| c. 1890 | Mill of Petty, Dwelling House | Fyvie | | Aberdeenshire | Scotland | |
| c. 1890 | Millhill, Dwelling House | Netherdale | | Aberdeenshire | Scotland | |
| c. 1890 | Moreless, Steading and House | Balmaud | | Aberdeenshire | Scotland | |
| c. 1890 | Moss-side of Auchaber, Steading | Auchaber | | Aberdeenshire | Scotland | |
| c. 1890 | Moss-side, Dwelling House | Blervie | | Morayshire | Scotland | |
| c. 1890 | Mossford, Steading and Dwelling House | Haddo | | Aberdeenshire | Scotland | |
| c. 1890 | Muirden, Farmsteading | Haddo | | Aberdeenshire | Scotland | |
| c. 1890 | New Byth Manse | New Byth / Newbyth | | Aberdeenshire | Scotland | Addition of bay windows |
| c. 1890 | New Deer, Shop and Warehouse | New Deer | | Aberdeenshire | Scotland | |
| c. 1890 | Newton of Auchaber, Dwelling House and Steading | Auchaber | | Aberdeenshire | Scotland | |
| c. 1890 | Newton of Greeness, Dwelling House and Steading | Cuminestown | | Aberdeenshire | Scotland | |
| c. 1890 | Newton of Templand, House and farmsteading | Newton of Templand | | Aberdeenshire? | Scotland | New house and addition to steading |
| c. 1890 | Newton of Teuchar | Teuchar | | Aberdeenshire | Scotland | |
| c. 1890 | Newton Raemore, Steading | Haddo | | Aberdeenshire | Scotland | |
| c. 1890 | North Auchinna, Steading | Netherdale | | Aberdeenshire | Scotland | |
| c. 1890 | Overhall, Steading and Housing | Netherdale/Muirs of Fyvie | | Aberdeenshire | Scotland | |
| c. 1890 | Oyne, House and shop | Oyne | | Aberdeenshire | Scotland | |
| c. 1890 | Parkhill, Cottage/Lodge | Monquhitter / Montquhitter | | Aberdeenshire | Scotland | |
| c. 1890 | Pitglassie, Steading and Dwelling House | Pitglassie | | Morayshire | Scotland | |
| c. 1890 | Reamshill, Steading | Fyvie | | Aberdeenshire | Scotland | |
| c. 1890 | Rhynach, Dwelling House and Steading | Haddo | | Aberdeenshire | Scotland | |
| c. 1890 | Rothienorman, Auction Mart | Fyvie | | Aberdeenshire | Scotland | |
| c. 1890 | Shargerwells, Dwelling House and Steading | Netherdale | | Aberdeenshire | Scotland | |
| c. 1890 | Shoggle, Steadings | Blervie | | Morayshire | Scotland | |
| c. 1890 | Shop for James Mackie | Inverurie | | Aberdeenshire | Scotland | |
| c. 1890 | South Balquhindachy, Dwelling House | Delgaty | | Aberdeenshire | Scotland | |
| c. 1890 | South Mains of Balgaveny, House and Steading | Balgaveny | | Aberdeenshire | Scotland | |
| c. 1890 | Teuchar, Dwelling Houses, Steading and House on Croft | Teuchar | | Aberdeenshire | Scotland | |
| c. 1890 | Tillyfar, Steading | Fyvie | | Aberdeenshire | Scotland | |
| c. 1890 | Todholes, Steadings | Blervie | | Morayshire | Scotland | |
| c. 1890 | Town and County Bank House | Fyvie | | Aberdeenshire | Scotland | |
| c. 1890 | Turriff Station, House for Mr Henry Marr | Turriff | | Aberdeenshire | Scotland | |
| c. 1890 | Turriff, House for Alex Troup | Turriff | | Aberdeenshire | Scotland | |
| c. 1890 | Turriff, House for George Stevenson | Turriff | | Aberdeenshire | Scotland | |
| c. 1890 | Turriff, House for M Paterson | Turriff | | Aberdeenshire | Scotland | |
| c. 1890 | Upper Burnside, Dwelling House and Steading | Blervie | | Morayshire | Scotland | |
| c. 1890 | Upper Mill of Pitglassie, Steading and Dwelling House | Pitglassie | | Morayshire | Scotland | |
| c. 1890 | Wardhaugh, Steading | Haddo | | Aberdeenshire | Scotland | |
| c. 1890 | Wardwell, Dwelling House | Inverkeithny | | Banffshire | Scotland | |
| c. 1890 | Wartle House | Rayne | | Aberdeenshire | Scotland | Alterations |
| c. 1890 | West Backhill, Steading and Dwelling House | Monkshill | | Aberdeenshire | Scotland | |
| c. 1890 | West Broomhill | Balmaud | | Aberdeenshire | Scotland | |
| c. 1890 | Wester Brocklach, Steadings | Blervie | | Morayshire | Scotland | |
| 1892 | Dunlugas School | Alvah | | Banffshire | Scotland | |
| 1892 | Largue School | Largue | | Aberdeenshire | Scotland | |
| 1893 | Linnhead School | Alva | | Clackmannanshire | Scotland | |
| 1894 | Greeness School | Cuminestown | | Aberdeenshire | Scotland | |
| 1894 | Rothiemay School | Rothiemay | | Banffshire | Scotland | |
| 1895 | School | Fyvie | | Aberdeenshire | Scotland | |
| 1895 | Turriff Hospital | Turriff | | Aberdeenshire | Scotland | |
| 1896 | Commercial Hotel | Turriff | | Aberdeenshire | Scotland | Reconstruction |
| 1896 | Meiklefolla School | | | Aberdeenshire | Scotland | |
| 1896 | Oyne School | Oyne | | Aberdeenshire | Scotland | |
| 1897 | Alford Infectious Diseases Hospital | Alford | | Aberdeenshire | Scotland | Original building |
| 1897 | Bank of Scotland | Turriff | | Aberdeenshire | Scotland | |
| 1897 | Gammie's | Turriff | | Aberdeenshire | Scotland | |
| 1897 | Hallhill House | Turriff | | Aberdeenshire | Scotland | Bought house and remodelled it for hos own use. |
| 1897 | Hallhill School | Turriff | | Aberdeenshire | Scotland | Reconstruction (for himself) |
| After 1897 | Three cottage hospitals | | | Aberdeenshire/Banffshire? | Scotland | |
| 1899 | Ord Church | Ord? | | Banffshire | Scotland | Additions and alterations |
| 1899 | Turriff Post Office | Turriff | | Aberdeenshire | Scotland | |
| Late 1800s | Villas, Station Road | Little Turriff | | Aberdeenshire | Scotland | |
| 1900 | Cran Cottage | Turriff | | Aberdeenshire | Scotland | |
| 1900 | Ordiquhill School | Ordiquhill | | Banffshire | Scotland | |
| c. 1900 | Ardinn, Steading | Delgaty | | Aberdeenshire | Scotland | |
| c. 1900 | Auchterless Church Hall | Auchterless | | Aberdeenshire | Scotland | |
| c. 1900 | Backhill of Ardmiddle, Dwelling House | Ardmiddle | | Aberdeenshire | Scotland | |
| c. 1900 | Backhill of Drachlaw, Steading and Dwelling House | Clunie | | Aberdeenshire | Scotland | |
| c. 1900 | Blackfolds, Dwelling House | Netherdale | | Aberdeenshire | Scotland | |
| c. 1900 | Blackford, Smithy | Blackford | | Aberdeenshire? | Scotland | |
| c. 1900 | Blairshillock, House | Blairshillock | | | Scotland | |
| c. 1900 | Brae of Crombie, Dwelling House and Offices | Haddo | | Aberdeenshire | Scotland | |
| c. 1900 | Burnfield, Steading | Avochie | | Aberdeenshire | Scotland | |
| c. 1900 | Cottage | Peterculter | | Aberdeenshire | Scotland | |
| c. 1900 | Crossfields, Dwellinghouse, Bungalow, Shed | Turriff | | Aberdeenshire | Scotland | |
| c. 1900 | Cuminestown, House for Dr Forbes | Cuminestown | | Aberdeenshire | Scotland | |
| c. 1900 | Easterfield School | Inverkeithny | | Banffshire | Scotland | |
| c. 1900 | Fintry School | Fintry | | Aberdeenshire | Scotland | Alterations |
| c. 1900 | Fisherford, Cottages | Auchterless | | Aberdeenshire | Scotland | |
| c. 1900 | Fyvie Manse | Fvyie | | Aberdeenshire | Scotland | |
| c. 1900 | Fyvie, Chemist's Shop for Mr Henderson | Fyvie | | Aberdeenshire | Scotland | |
| c. 1900 | Gallowhill, Dwelling House and Reconstruction of Steading | Haddo | | Aberdeenshire | Scotland | |
| c. 1900 | Glenfoudland School | Glenfoudland/Glen Foudland | | Aberdeenshire | Scotland | |
| c. 1900 | Gowanbank, House for Alex Mackie | Fyvie | | Aberdeenshire | Scotland | Additions |
| c. 1900 | Greens, Feithhill, Farm Steading | Clunie | | Aberdeenshire | Scotland | |
| c. 1900 | Heathfield, Dwelling House | Netherdale/Corse | | Aberdeenshire | Scotland | |
| c. 1900 | House and Shop for Mrs Mackie | Fyvie | | Aberdeenshire | Scotland | |
| c. 1900 | House at Turriff Station for Mr Balloch | Turriff | | Aberdeenshire | Scotland | |
| c. 1900 | Insch, House for Mr Barnett | Insch | | Aberdeenshire | Scotland | |
| c. 1900 | Itlaw, Steading, Grieve's cottage, Double Cottage | Mountblairy | | Banffshire | Scotland | |
| c. 1900 | King Edward School | King Edward | | Aberdeenshire | Scotland | |
| c. 1900 | Knowes, Steading and Farmhouse | Balgaveny | | Aberdeenshire | Scotland | |
| c. 1900 | Laithers House, Lodge | Laithers | | Aberdeenshire | Scotland | |
| c. 1900 | Lewes, Sheds, Warehouse, Stable and House | Fyvie | | Aberdeenshire | Scotland | |
| c. 1900 | Linkbraeheads, Dwelling House | Glassaugh | | Banffshire | Scotland | |
| c. 1900 | Linnhead School | Alvah | | Banffshire | Scotland | |
| c. 1900 | Lochter, Dwelling House and Steading | Balcairn | | Aberdeenshire | Scotland | |
| c. 1900 | Mains of Eden, Steading | Eden | | Aberdeenshire | Scotland | |
| c. 1900 | Maryfield, Dwelling House | Maryfield | | Aberdeenshire | Scotland | |
| c. 1900 | Mid Bodiechell, Steading and Dwelling House | Netherdale | | Aberdeenshire | Scotland | |
| c. 1900 | Mill of Crombie, Steading | Haddo | | Aberdeenshire | Scotland | |
| c. 1900 | Mill of Laithers, Steading and Dwelling House | Ardmiddle | | Aberdeenshire | Scotland | |
| c. 1900 | Moss-side of Teuchar, Dwelling House Specifications | Moss-side of Teuchar | | Aberdeenshire | Scotland | |
| c. 1900 | Moss-side, Dwelling House | Culvie | | Aberdeenshire | Scotland | |
| c. 1900 | North Colyne, Dwelling House | Colyne, Bognie | | Aberdeenshire | Scotland | |
| c. 1900 | North Monkshill, Dwelling House and Steading | Monkshill | | Aberdeenshire | Scotland | |
| c. 1900 | North Pitglassie, House, Steading and Water Supply | Pitglassie | | Morayshire | Scotland | |
| c. 1900 | Peatknowe, Steading | Haddo | | Aberdeenshire | Scotland | |
| c. 1900 | Rettanoch, Dwelling House and other Buildings | Rothiemay | | Morayshire | Scotland | |
| c. 1900 | Rosebrae, Dwelling House and Offices | Netherdale | | Aberdeenshire | Scotland | |
| c. 1900 | Rosecroft, Dwelling House Specifications | Netherdale | | Aberdeenshire | Scotland | |
| c. 1900 | Rowntree, Steading and Dwelling House Additions | Haddo | | Aberdeenshire | Scotland | |
| c. 1900 | Sexton's House | Alvah | | Banffshire | Scotland | |
| c. 1900 | South Sandlaw, Double Cottage | South Sandlaw | | Aberdeenshire | Scotland | |
| c. 1900 | Sprottynook, Steading and Dwelling House | Netherdale | | Aberdeenshire | Scotland | |
| c. 1900 | Stonifield, Raemore, Dwelling House Specifications | Haddo | | Aberdeenshire | Scotland | |
| c. 1900 | Stripeside, Dwelling House and Steading | Netherdale/Corse | | Aberdeenshire | Scotland | |
| c. 1900 | Strocherie, Double Cottage | Strocherie | | Aberdeenshire | Scotland | |
| c. 1900 | Templeford, Cottage | Auchaber | | Aberdeenshire | Scotland | |
| c. 1900 | Turriff Cemetery, Caretaker's House, gates and tool shed | Turriff | | Aberdeenshire | Scotland | |
| c. 1900 | Upper Woodside, Dwelling House Specifications | Netherdale | | Aberdeenshire | Scotland | |
| c. 1900 | Woodside of Delgaty, Dwelling House and Steading | Delgaty | | Aberdeenshire | Scotland | |
| c. 1900 | Writing Chambers for George Lyall, Victoria Terrace | Turriff | | Aberdeenshire | Scotland | |
| 1901 | Farm steading, Rothiebrisbane | Fyvie | | Aberdeenshire | Scotland | Alterations |
| 1901 | Hatton Castle | Turriff | | Aberdeenshire | Scotland | Alterations at upper floors |
| 1901 | Hatton Estate, Cushnie Farmstead | Auchterless | | Aberdeenshire | Scotland | Alterations |
| 1901 | Hatton Estate, Upperthird farmstead | Auchterless | | Aberdeenshire | Scotland | Alterations |
| 1901 | House, Middlehill | | | Aberdeenshire | Scotland | |
| 1901 | Steading, Bankhead | | | Aberdeenshire | Scotland | |
| 1901 | Steadings, Auchterless | Auchterless | | Aberdeenshire | Scotland | Alterations |
| 1902 | Delgatie Castle, Home Farm Steading | Delgatie | | Aberdeenshire | Scotland | Alterations and additions and repairs |
| 1903 | Brae of Crombie | Marnoch | | Banffshire | Scotland | |
| 1903 | Easterfreefield School | Easterfreefield (Lerwick?) | Mainland? | Shetland?/Aberdeenshire? | Scotland | |
| 1903 | Gallowhill | Marnoch | | Banffshire | Scotland | |
| 1903 | Kennethmont School | Kennethmont/Kinnethmont | | Aberdeenshire | Scotland | |
| After 1905(?) | Cairnborrow Lodge and Gamekeeper's House | Glass | | Aberdeenshire | Scotland | Uncertain whether James Duncan was involved - may have been carried out by practice after his death |
| After 1905(?) | Technical School | Turriff | | Aberdeenshire | Scotland | Uncertain whether James Duncan was involved - may have been carried out by the practice after his death |
| 1906 | Manse of Fyvie | Fyvie | | Aberdeenshire | Scotland | Bay windows and single storey addition |
| 1907 | Insch Church hall | Insch | | Aberdeenshire | Scotland | |
| 1907 | Ythanwells Manse | Ythanwells | | Aberdeenshire | Scotland | Restoration |
| c. 19=870 | Muiresk, Cottages | Muiresk | | Aberdeenshire | Scotland | |