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 |
| c. 1925 | Local Authority Housing between N slope of Dundee Law and Strathmore Avenue | Lawton | | Dundee | Scotland | Was perhaps City Engineer by this date. |
| 1930s | St Michael's RC School | | | Dundee | Scotland | David McLay given as architect in Architect & Building News and in Gifford. He was nominally in charge as City Engineer but in practice it would have been designed by McLellan Brown. |
| 1930 | City Square | | | Dundee | Scotland | Redevelopment of City Square |
| 1930 | Dundee Transport Depot | | | Dundee | Scotland | |
| 1930 | Fire Station | | | Dundee | Scotland | David McLay given as architect in Architect & Building News and in Gifford. He was nominally in charge as City Engineer but in practice it would have been designed by McLellan Brown. |
| 1930 | Police Headquarters | | | Dundee | Scotland | |
| 1931 | Ashludie House | Monifieth | | Angus | Scotland | David McLay given as architect of large detached block to S in Gifford. He was nominally in charge as City Engineer but in practice it would have been designed by McLellan Brown. |
| 1931 | East Poorhouse and Maryfield Hospital | Stobswell | | Dundee | Scotland | New buildings |
| 1931 | Municipal Buildings | | | Dundee | Scotland | New Wings |
| 1931 | St John's Roman Catholic School | | | Dundee | Scotland | |
| 1931 | St Martin's Episcopal School | | | Dundee | Scotland | |
| 1932 | Mills Observatory, Balgay Park | | | Dundee | Scotland | David McLay given as architect in Gifford. He was nominally in charge as City Engineer but in practice it would have been designed by McLellan Brown |
| 1933 | Marryat Street School | | | Dundee | Scotland | |
| 1934 | Block of flats, 31-33 Kinghorne Road | Hilltown | | Dundee | Scotland | David McLay given as architect in Gifford. He was nominally in charge as City Engineer but in practice it would have been designed by McLellan Brown |
| 1935 | Dundee Royal Infirmary | | | Dundee | Scotland | Reconstruction and additions |
| 1935 | Mid Craigie Housing Estate | Mid Craigie | | Dundee | Scotland | David McLay given as architect in Gifford. He was nominally in charge as City Engineer but in practice it would have been designed by McLellan Brown |
| 1935 | Mid Craigie School | Mid Craigie | | Dundee | Scotland | Builder reports that he is architect of the school - as City Architect: McLay was in fact a civil engineer |
| 1935 | Morgan Place Housing | | | Dundee | | David McLay given as architect in Gifford. He was nominally in charge as City Engineer but in practice it would have been designed by McLellan Brown. |
| 1936 | Linlathen Housing Development | | | Dundee | Scotland | David McLay given as architect in Gifford. He was nominally in charge as City Engineer but in practice it would have been designed by McLellan Brown |
| 1936 | Tenements, Hilltown | | | Dundee | Scotland | David McLay given as architect in Gifford. He was nominally in charge as City Engineer but in practice it would have been designed by McLellan Brown |
| 1937 | Stobswell Boys' School | | | Dundee | | Attributed to McLay by Gifford but he was an engineer and only nominally in charge. |
Currently, there are no references for this . The information has been derived from: the British Architectural Library / RIBA Directory of British Architects 1834-1914; Post Office Directories; and/or any sources listed under this individual's works.