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 |
| | House, James Street | Tarbolton | | Ayrshire | Scotland | Additions and alterations - date not known |
| | Mole Cottage, Joppa | Coylton | | Ayrshire | Scotland | Additions and alterations - date not known |
| | Western House | Ayr | | Ayrshire | Scotland | Contribution unclear (Michael C Davis writes that the practice 'seems to have been involved in the project in some way) |
| 1890 | Competition designs for proposed bridge over the River Clyde | | | | Scotland | As draughtsman to Charles C Lindsay |
| 1890 | Competition designs for proposed theatre and assembly rooms | | | Singapore | Singapore | As draughtsman to Charles C Lindsay |
| 1895 | Dankeith House | Dundonald (near) | | Ayrshire | Scotland | Additions and alterations? - as managing assistant to Allan Stevenson |
| 1896 | Ayr Parish Church Halls | Ayr | | Ayrshire | Scotland | As managing assistant to Allan Stevenson |
| 1897 | Ayrshire Lunatic Asylum | Ayr | | Ayrshire | Scotland | Drains, extensions and new villas - as managing assistant to Allan Stevenson |
| 1898 | Cumnock Fever Hospital | Cumnock | | Ayrshire | Scotland | As managing assistant to Allan Stevenson |
| 1899 | Irvine Golf Club, Bogside | Ayr | | Ayrshire | Scotland | Club House - as managing assistant to Allan Stevenson |
| 1900 | Robertson Memorial Church | Ayr/Wallacetown | | Ayrshire | Scotland | as managing assistant to Allan Stevenson |
| 1900 | Southannan House | West Kilbride (near) | | Ayrshire | Scotland | Additions and alterations to house - as managing assistant to Allan Stevenson |
| 1902 | Fergushill School | Kilwinning | | Ayrshire | Scotland | Additions and alterations - as managing assistant to Allan Stevenson |
| 1902 | Lady Bute's Hospital | Cumnock | | Ayrshire | Scotland | Additions - as managing assistant to Allan Stevenson |
| 1903 | Dairy School | Kilmarnock | | Ayrshire | Scotland | As managing assistant to Allan Stevenson |
| 1903 | Kilmarnock Sheriff Court | Kilmarnock | | Ayrshire | Scotland | Additions and alterations - as managing assistant to Allan Stevenson |
| 1904 | County Buildings and Sheriff Court | Ayr | | Ayrshire | Scotland | Alterations, additions and remodelling - as assistant to Allan Stevenson |
| 1904 | Montgomerie House | Tarbolton (near) | | Ayrshire | Scotland | Minor additions - as managing assistant to Allan Stevenson |
| 1905 | Glen Afton Sanatorium | New Cumnock | | Ayrshire | Scotland | Acted as site architect - as managing assistant to Allan Stevenson |
| 1906 | RC School | Cumnock | | Ayrshire | Scotland | As managing assistant to Allan Stevenson |
| 1907 | Ayr Racecourse and Grandstands | Wallacetown | | Ayrshire | Scotland | As managing assistant to Allan Stevenson |
| 1907 | Creamery | Kirkmichael | | Ayrshire | Scotland | As managing assistant to Allan Stevenson |
| 1908 | House | Wemyss Bay | | Renfrewshire | Scotland | Additions and alterations to Hydropathic, after conversion from house - plans dated |
| 1908 | Knockdolian House | Colmonell (near) | | Ayrshire | Scotland | Additions - as managing assistant to Allan Stevenson |
| 1908 | Loch Ericht Hotel | Dalwhinnie | | Inverness-shire | Scotland | Additions - as managing assistant to Allan Stevenson |
| 1909 | Mitchells Bacon Factory and Offices, Garden Street | Ayr | | Ayrshire | Scotland | Additions and alterations to factory - as managing assistant to Allan Stevenson |
| 1910 | Castlehill, plan showing straightening of road near Castlehill Stables | Ayr | | Ayrshire | Scotland | As managing assistant to Allan Stevenson |
| 1910 | Hourstons Drapery Warehouse | Ayr | | Ayrshire | Scotland | Further work - as managing assistant to Allan Stevenson |
| 1910 | Parish Church Hall (or Halls?) | Colmonell | | Ayrshire | Scotland | As managing assistant to Allan Stevenson |
| 1911 | Feuing plans and new roads, Kingcase | Prestwick | | Ayrshire | Scotland | Plans dated |
| 1911 | Stair School | Stair | | Ayrshire | Scotland | Remodelling and extension - as managing assistant to Allan Stevenson |
| 1920 | Ayr War Memorial | Ayr | | Ayrshire | Scotland | Unsuccessful competition entry |
| 1922 | Cottages for John Toll and Daniel Brakenridge | Ayr | | Ayrshire | Scotland | |
| 1923 | Double house for F H Macpherson | Ayr | | Ayrshire | Scotland | |
| 1923 | Sewers at Southannan | Fairlie | | Ayrshire | Scotland | Plans dated |
| 1924 | 40-44 High Street | Ayr | | Ayrshire | Scotland | |
| 1924 | Ayrshire Sanatorium | | | Ayrshire | Scotland | Alterations and additions |
| 1924 | Brick houses | Cronberry | | Ayrshire | Scotland | |
| 1924 | Hall at Annbank | Annbank | | Ayrshire | Scotland | |
| 1924 | Kingsbridge & Salcombe District Cottage Hospital | | | Devon | England | Begun by Cassels alone; completed in partnership with Mair |
| 1924 | Knockrivoch Farm | | | Ayrshire | Scotland | Additions and alterations - plans dated |
| 1924 | Mossblown and Drumley Community Centre | Mossblown | | Ayrshire | Scotland | |
| 1925 | Blacklands | | | Ayrshire | Scotland | Plan of grounds |
| 1925 | Bungalow for James Smith | Ayr | | Ayrshire | Scotland | |
| 1925 | Bungalow for John Boyd, Kingcase | Prestwick | | Ayrshire | Scotland | Plans dated |
| 1925 | Bungalows for R W Hill | Prestwick | | Ayrshire | Scotland | Plans dated |
| 1925 | Burnton Farm, 44 Houses for Dalmellington Iron Company | Dalmellington | | Ayrshire | Scotland | |
| 1925 | Double Villa for William Govan & Sons | Prestwick | | Ayrshire | Scotland | Plans dated |
| 1925 | Drumdone Estate | | | Ayrshire | Scotland | Plans - unclear whether by Mair or Cassels |
| 1925 | Enterkine Estate, Milton Mill | Stair (near) | | Ayrshire | Scotland | Plan of ground |
| 1925 | Galloway Creamery | Stranraer | | Wigtownshire | Scotland | Manager's house - plans dated |
| 1925 | Hall, The Glebe | Ballantrae | | Ayrshire | Scotland | |
| 1925 | Kirkmichael House | | | Ayrshire | Scotland | Additions to house - plans dated |
| 1925 | Mid Moncur, plan of ground | | | Ayrshire | Scotland | Plans dated |
| 1925 | Mr Andrew Mitchell's ground, Kingcase | Prestwick | | Ayrshire | Scotland | Plans dated |
| 1926 | Brae of Auchendrane | Maybole (near) | | Ayrshire | Scotland | Additions and alterations to 'Brae Farm' |
| 1926 | Nethermains Farm | Nethermains | | Ayrshire | Scotland | Plan of ground |
| 1926 | Three-apartment flatted houses | Ayr | | Ayrshire | Scotland | |
| 1926 | Water supply | West Drumsuie | | Ayrshire? | Scotland | Plans dated |
| 1926 | William Culley's property | Girvan | | Ayrshire | Scotland | Details drawings |
| 1927 | Bridgend Café | Dalmellington | | Ayrshire | Scotland | Billiard Saloon |
| 1927 | Caldwell House | Uplawmoor | | Renfrewshire | Scotland | Conversion to psychiatric hospital - alterations, additions and new garden wall |
| 1928 | 17 Carrick Street | Ayr | | Ayrshire | Scotland | Alterations |
| 1928 | Carrick Furniture House | Ayr | | Ayrshire | Scotland | Additions, alterations and new footpath |
| 1928 | Enterkine Estate | Stair (near) | | Ayrshire | Scotland | Plans |
| 1928 | Loch Ericht Hotel | Dalwhinnie | | Inverness-shire | Scotland | Additions and alterations |
| 1928 | Rozelle Estates, Bloomberry Farm | | | Ayrshire | Scotland | Alterations |
| 1929 | 42 Carrick Street | Ayr | | Ayrshire | Scotland | Alterations to fish restaurant |
| 1929 | 6-10 Newmarket Street | Ayr | | Ayrshire | Scotland | Alterations to no 6 |
| 1929 | Chalmers Road, plan | Ayr | | Ayrshire | Scotland | |
| 1929 | Double Cottage for John Ramsay | Ayr | | Ayrshire | Scotland | |
| 1929 | Enterkine Estate, Pierhill, plan of grounds | Stair (near) | | Ayrshire | Scotland | Plan of grounds |
| 1930 | 26 Barns Street | Ayr | | Ayrshire | Scotland | Additions and alterations |
| 1930 | Housing at Whiteletts | Ayr | | Ayrshire | Scotland | |
| 1930 | Knockdon Estate, Glenhead Steading | Dalrymple (near) | | Ayrshire | Scotland | Water tanks - plans dated |
| 1930 | Rozelle Estate, South Corton | | | Ayrshire | Scotland | Additions and alterations - plans dated |
| 1930 | Rozelle House | Ayr | | Ayrshire | Scotland | Alterations to house, lodges, and cottages at Home Farm |
| 1930 | Shop for J & L Freeman | Ayr | | Ayrshire | Scotland | |
| 1931 | 50 Newmarket Street | Ayr | | Ayrshire | Scotland | Alterations and additions |
| 1931 | 8 and 9 Hill Street | Tarbolton | | Ayrshire | Scotland | Additions and alterations - plans dated |
| 1931 | Carrick Furniture Warehouse, Sunblind | Ayr | | Ayrshire | Scotland | |
| 1931 | Cold Storage Chambers, Mill Street | Ayr | | Ayrshire | Scotland | Reconstruction |
| 1931 | Cottage and shop for Mrs Fred Murdoch | Ayr | | Ayrshire | Scotland | |
| 1931 | Helensburgh Cottage, Joppa | Coylton | | Ayrshire | Scotland | Additions and alterations - plans dated |
| 1931 | Knockdon Estate, cottages | Dalrymple (near) | | Ayrshire | Scotland | Alterations - plans dated |
| 1931 | Knockdon Estate, Glenhead Steading | Dalrymple (near) | | Ayrshire | Scotland | Additions, alterations and sheep shelter - plans dated |
| 1931 | Knockdon Estate, house | Dalrymple (near) | | Ayrshire | Scotland | Additions and alterations - plans dated |
| 1931 | Orchard Cottage, Joppa | Coylton | | Ayrshire | Scotland | Additions and alterations - plans dated |
| 1932 | Carrick Furniture House | Ayr | | Ayrshire | Scotland | |
| 1932 | Carrick House | Girvan | | Ayrshire | Scotland | Additions and alterations - plans dated |
| 1932 | Ebenezer Gospel Hall | Crosshill | | Ayrshire | Scotland | |
| 1932 | Joppa Cottage | Coylton | | Ayrshire | Scotland | Alterations |
| 1932 | Mission Hall | Crosshill | | Ayrshire | Scotland | |
| 1932 | Properties of Alexander Lamb Esq, New Street and Kennedy's Close, Cathcartston | Dalmellington | | Ayrshire | Scotland | Additions and alterations |
| 1932 | Roseview Cottage, Joppa | Coylton | | Ayrshire | Scotland | Plans dated |
| 1933 | 11-15 Main Street | Ayr | | Ayrshire | Scotland | Additions and alterations |
| 1933 | ? & 5 Ashgrove Street | Ayr | | Ayrshire | Scotland | Alterations |
| 1933 | Blacksmith's cottage | Culroy | | Ayrshire | Scotland | Additions and alterations |
| 1933 | Bungalow for Miss Morrison | Bogend-Symington | | Ayrshire | Scotland | |
| 1933 | Carrick Furniture House | Ayr | | Ayrshire | Scotland | |
| 1933 | Doonbank, feuing plan | Ayr | | Ayrshire | Scotland | |
| 1933 | Feuing plans and new roads, Kingcase | Prestwick | | Ayrshire | Scotland | Plans dated |
| 1933 | Lochend Farm | Coylton | | Ayrshire | Scotland | New byre |
| 1933 | Shepherds' cottages, Lochhead | Loch Doon | | Ayrshire | Scotland | Plans dated |
| 1934 | Arcade Café | Ayr | | Ayrshire | Scotland | Alterations |
| 1934 | Burnside Cottages, Joppa | Coylton | | Ayrshire | Scotland | Additions and alterations - plans dated |
| 1934 | Corsehill, Coila | Coylton | | Ayrshire | Scotland | Additions and alterations |
| 1934 | Hillend Farm | | | Ayrshire | Scotland | Additions and alterations - plans dated |
| 1934 | Property, Croft Street | Dalmellington | | Ayrshire | Scotland | Alterations |
| 1934 | Rosebank Cottage | Coylton | | Ayrshire | Scotland | Additions and alterations |
| 1934 | Seamill Hydropathic | Seamill | | Ayrshire | Scotland | Unspecified work (plans dated) - uncertain whether for this or another Seamill building |
| 1935 | 52-58 York Street Lane | Ayr | | Ayrshire | Scotland | Additions and alterations |
| 1935 | Burnbrae Cottage | Sundrum | | Ayrshire | Scotland | Additions and alterations |
| 1935 | Coil Cottage, Joppa | Coylton | | Ayrshire | Scotland | Additions and alterations - plans dated |
| 1935 | Dunragit House | | | Wigtownshire | Scotland | Alterations and additions |
| 1935 | Knockdon Estate, Burnhouse Steading | Dalrymple (near) | | Ayrshire | Scotland | Additions and alterations |
| 1935 | Knockdon Estate, new house and garage | Dalrymple (near) | | Ayrshire | Scotland | Plans dated |
| 1935 | Milleraig Farm | Sundrum | | Ayrshire | Scotland | Alterations - plans dated |
| 1935 | Mr Reid's Trust feuing | Ayr | | Ayrshire | Scotland | |
| 1935 | Smithy House | Drongan | | Ayrshire | Scotland | Additions and alterations - plans dated |
| 1935 | Wallacetown North Church Hall | Wallacetown | | Ayrshire | Scotland | Alterations |
| 1936 | 233 High Street | Ayr | | Ayrshire | Scotland | Additions and alterations |
| 1936 | Bungalow for James Dykes | Barclaugh | | Ayrshire | Scotland | |
| 1936 | Bungalow for John Spence, Laurieston | Dundonald | | Ayrshire | Scotland | Plans dated |
| 1936 | Cottage, Joppa | Coylton | | Ayrshire | Scotland | Additions and alterations - plans dated |
| 1936 | Cottages | Drongan | | Ayrshire | Scotland | Additions and alterations - plans dated |
| 1936 | Cottages, Joppa | Coylton | | Ayrshire | Scotland | Additions and alterations - plans dated |
| 1936 | High Keirs, byres | Drumgrange Estate | | Ayrshire | Scotland | Plans dated |
| 1936 | House at Pirnmill for David H Reid | Pirnmill | Arran | Bute | Scotland | Plans dated |
| 1936 | House for John Kelso | Gatehouse of Fleet | | Kirkcudbrightshire | Scotland | Plans dated |
| 1936 | Laurel Cottage, Joppa | Coylton | | Ayrshire | Scotland | Additions and alterations - plans dated |
| 1936 | Low Keirs, Farm | Drumgrange Estate | | Ayrshire | Scotland | Additions and alterations - plans dated |
| 1936 | Proposed cottages for Mr John Ross | Ayr | | Ayrshire | Scotland | |
| 1937 | 52-54 Sandgate | Ayr | | Ayrshire | Scotland | Alterations and additions |
| 1937 | Auchenharvie, new byre | Stewarton | | Ayrshire | Scotland | |
| 1937 | Glenpark Hotel | Ayr | | Ayrshire | Scotland | Additions |
| 1937 | Knockdolian House | Colmonell (near) | | Ayrshire | Scotland | Dam across Knockdhu Burn on estate |
| 1937 | Knockdon Estate, stable court | Minishant | | Ayrshire | Scotland | |
| 1937 | Laigh Grange Farm | | | Ayrshire | Scotland | Additions and alterations to cot-houses |
| 1937 | Mansfield Estate, Waterside Farm | New Cumnock | | Ayrshire | Scotland | Alterations to dairy offices and byre - plans dated |
| 1937 | Mark Farm | Stranraer | | Wigtownshire | Scotland | New buildings - plans dated |
| 1937 | Montgomerie Estate, Seamill feuing | Tarbolton (near)? | | Ayrshire | Scotland | Plans date |
| 1937 | Property for Dr Innan | Ayr | | Ayrshire | Scotland | Additions and alterations |
| 1937 | Sceneryhill Cottage | Rankinstone | | Ayrshire | Scotland | Additions and alterations - plans dated |
| 1937 | The Cottage | Failford | | Ayrshire | Scotland | Alterations - plans dated |
| 1938 | 46-50 Titchfield Street | Kilmarnock | | Ayrshire | Scotland | Additions and alterations - plans dated |
| 1938 | Bungalow for Andrew Watt | Ayr | | Ayrshire | Scotland | |
| 1938 | Bungalow for Mrs Boyd Anderson | Ayr | | Ayrshire | Scotland | |
| 1938 | Bungalow for Robert Connell, Kayshill-Trabboch | | | Ayrshire | Scotland | Plans dated |
| 1938 | Bungalow for Thomas Knox | Drongan | | Ayrshire | Scotland | Plans dated |
| 1938 | Carclout | Patna | | Ayrshire | Scotland | Additions and alterations |
| 1938 | House for John Ross | Ayr | | Ayrshire | Scotland | |
| 1938 | Offices for Ayrshire Post | Ayr | | Ayrshire | Scotland | Additions and alterations |
| 1938 | Property at Joppa | Coylton | | Ayrshire | Scotland | Additions and alterations - plans dated |
| 1938 | Victoria Engineering Works | Ayr? | | Ayrshire? | Scotland | |
| 1939 | Annbank Farm | Annbank | | Ayrshire | Scotland | Alterations |
| 1939 | Bungalow for Jack Freeman | Craigwell | | Ayrshire | Scotland | |
| 1939 | Bungalow for John Ross | Ayr | | Ayrshire | Scotland | |
| 1939 | Bungalow for John Ross | Ayr | | Ayrshire | Scotland | |
| 1939 | Bungalow for Mrs Maria Somerville Carrie | Ayr | | Ayrshire | Scotland | |
| 1939 | Cottage for J J Johnston | Lugar | | Ayrshire | Scotland | Plans dated |
| 1939 | High Grange Farm | Maybole | | Ayrshire | Scotland | Cottage nearby - plans dated |
| 1939 | New road, Doonbank | Ayr | | Ayrshire | Scotland | |
| 1939 | Warrix Farm, block of 3 four-apartment cottages | Dreghorn | | Ayrshire | Scotland | Plans dated |
| 1940 | Cottage | Straiton | | Ayrshire | Scotland | Additions and alterations - plans dated |
| 1940 | Farm Cottage, Crawfordston | Annbank | | Ayrshire | Scotland | |
| 1940 | Fowlers Croft, new cottage | Straiton | | Ayrshire | Scotland | Plans dated |
| 1940 | Merrick Hall | Dalmellington | | Ayrshire | Scotland | |
| 1941 | Cottage, Dormieston-Trabboch | Dormieston/Trabboch | | Ayrshire | Scotland | Alterations and additions - plans dated |
| 1942 | Mount Ferguson Farm | | | Ayrshire | Scotland | Proposed cattle boxes - plans dated |
| 1944 | Cattlemarket, new byre for James Craig Ltd | Ayr | | Ayrshire | Scotland | |
| 1945 | Double Cottages for J Hyslop | Maybole | | Ayrshire | Scotland | Plans dated |