| Historic Environment Scotland | Listed Buildings Register | 12480 | |
| National Monuments Record of Scotland/NMRS, RCAHMS | Lorimer and Matthew Collection | | LOR A/16 (RED 2/35-36 drawings for tea garden stair and loggia) |
| National Monuments Record of Scotland/NMRS, RCAHMS | NMRS Photographic Archive | | RED 2/8-9, 14-22 Photograph of plans from Ardgowan (Ardgowan Folio); RED 2/37 drawing of railing by Ramsay Traquair |
| Strathclyde Regional Archives | Plans | T-ARD 1/6/181 | |
| Yale Centre for British Art | Archive | | original drawings by Cairncross |
| Yale Centre for British Art | Archive | | Cleghorn drawings |