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 |
| 1888 | Lambhill Cemetery, Memorial to James Sellars | | | Glasgow | Scotland | |
| November 1888 | Anderson's College Medical School | Kelvinhaugh | | Glasgow | Scotland | Completed after Sellars's death, Keppie also probably designed much of the detailing |
| 1889 | 140 Bath Street (to rear) at Sauchiehall Lane | | | Glasgow | Scotland | Extension |
| 1889 | 3 Grosvenor Terrace | | | Glasgow | Scotland | Interior work and additions, £4260. |
| 1889 | Building in Virginia Street | | | Glasgow | Scotland | Alterations |
| 1889 | Cardross Drill Hall, Geilston | Cardross | | Dunbartonshire | Scotland | |
| 1889 | Craigton House | Fintry | | Stirlingshire | Scotland | Internal alterations |
| 1889 | Fairfield Shipbuilding Company Offices | Govan | | Glasgow | Scotland | |
| 1889 | Free West Church | Greenock | | Renfrewshire | Scotland | Additions |
| 1889 | Kilarden | Rosneath / Roseneath | | Dunbartonshire | Scotland | Additions |
| 1890 | Aberfoyle School | Aberfoyle | | Perthshire | Scotland | Additions |
| 1890 | Building for Wylie & Lochhead | | | Glasgow | Scotland | Alterations |
| 1890 | Camis Eskan House | Craigendoran | | Dunbartonshire | Scotland | Alterations |
| 1890 | Craigrownie Church | Cove | | Dunbartonshire | Scotland | Alterations |
| 1890 | Craigton Cemetery, Sir William Pearce Memorial | | | Glasgow | Scotland | |
| 1890 | Dr Crystal Memorial, Glasgow Cathedral | | | Glasgow | Scotland | |
| 1890 | Dunloe | Wemyss Bay | | Renfrewshire | Scotland | Remodelling |
| 1890 | Free Church | North Berwick | | East Lothian | Scotland | Additions |
| 1890 | Glasgow Cathedral | | | Glasgow | Scotland | Unspecified work, £534. |
| 1890 | Hide and Skin Market | | | Glasgow | Scotland | |
| 1890 | Memorial to Robert Millar | | | | Scotland | |
| 1890 | Redclyffe | Springburn | | Glasgow | Scotland | Designed by Mackintosh for his uncle (but while assistant to Honeyman & Keppie) |
| 1890 | Sir James Watson Memorial | | | | Scotland | |
| 1890 | Sugar Exchange | Greenock | | Renfrewshire | Scotland | |
| c. 1890 | House, Rowallan Road | Thornliebank | | Glasgow | Scotland | |
| 1891 | Auchencraig | Largs | | Ayrshire | Scotland | |
| 1891 | Bank of Scotland Buildings | | | Glasgow | Scotland | Minor alterations |
| 1891 | Canal Boatmen's Institute | Port Dundas | | Glasgow | Scotland | |
| 1891 | Carrick Church, Carrick Castle | Loch Goil | | Argyll | Scotland | |
| 1891 | Dunrowan | Rhu/Row | | Dunbartonshire | Scotland | Further alterations |
| 1891 | East Kilbride Parish Church | East Kilbride | | Lanarkshire | Scotland | Communion table and chair |
| 1891 | Gargunnock Parish Church | Gargunnock | | Stirlingshire | Scotland | Alterations |
| 1891 | Glasgow Art Gallery and Museum | Kelvingrove | | Glasgow | Scotland | Competition design - short-listed and selected for final competition |
| 1891 | House (?) for Captain Rickards | North Berwick | | East Lothian | Scotland | Alterations and additions |
| 1891 | Iona Abbey | | Iona | Argyll | Scotland | Proposed restoration of nave - not executed at the time |
| 1891 | Loretto School Chapel | Musselburgh | | Midlothian | Scotland | |
| 1891 | Rhu Parish Church | Rhu/Row | | Dunbartonshire | Scotland | Additions and alterations |
| 1891 | Store in Bishop Street | | | Glasgow | Scotland | Repairs |
| 1891 | Tenement Buildings competition | | | Glasgow | Scotland | With Mackintosh as assistant |
| 1891 | The Glassert | Aberfoyle | | Perthshire | Scotland | Alterations to house, veranda and repairs |
| 1892 | 218-220 St Vincent Street | | | Glasgow | Scotland | Alterations and conversion to offices (no 220) |
| 1892 | Bellahouston Established Church | | | Glasgow | Scotland | Alterations |
| 1892 | Glasgow Cathedral, Monument to Dr Peter Low | | | Glasgow | Scotland | |
| 1892 | Grain Store | Cheapside | | Glasgow? | Scotland | |
| 1892 | Manchester Technical Schools | | | Manchester | England | Competition design submitted (Mackintosh as assistant) - unplaced |
| 1892 | Old Kilpatrick Parochial Offices | Dalmuir | | Dunbartonshire | Scotland | |
| 1892 | Prestwick Free Church | Prestwick | | Ayrshire | Scotland | Alterations and additions, £971. |
| 1892 | Store for William McHarg | | | Glasgow | Scotland | Conversion of flour mill to store |
| 1892 | Westbourne Free Church | Kelvinside | | Glasgow | Scotland | Alterations and organ case |
| c. 1892 | Bluevale Church | Dennistoun | | Glasgow | Scotland | Alterations |
| c. 1892 | Craigiehall | Bellahouston | | Glasgow | Scotland | Interior additions |
| 1893 | Abercorn Parish Church | Paisley | | Renfrewshire | Scotland | Alterations |
| 1893 | Castlemilk House | | | Glasgow | Scotland | Additions |
| 1893 | Conservative Club | Helensburgh | | Dunbartonshire | Scotland | Mackintosh probably responsible, whilst assistant |
| 1893 | Cowden Castle | Muckart | | Perthshire | Scotland | Additions |
| 1893 | Dean Park Parish Church | Govan | | Glasgow | Scotland | |
| 1893 | Glasgow Art Club | | | Glasgow | Scotland | New saloon and other alterations |
| 1893(?) | Glasgow Herald Building | | | Glasgow | Scotland | Mitchell Street new building and internal remodelling |
| 1893 | Gourock Central School | Gourock | | Renfrewshire | Scotland | Addition |
| 1893 | Morland House | Upper Skelmorlie | | Ayrshire | Scotland | Further additions |
| 1893 | Property at 34 Carrick Street | | | Glasgow | Scotland | |
| 1893 | Skelmorlie Parish Church | Skelmorlie | | Ayrshire | Scotland | |
| 1893 | St Michael's Parish Church | Linlithgow | | West Lothian | Scotland | Restoration |
| 1893 | St Thomas Wesleyan Methodist Church | | | Glasgow | Scotland | Alterations |
| 1893 | Strathblane Free Church | Blanefield | | Stirlingshire | Scotland | Recast and extended |
| 1894 | Auchencraig | Largs | | Ayrshire | Scotland | Additions |
| 1894 | Bridge of Allan Chapel of Ease | Bridge of Allan | | Stirlingshire | Scotland | Minor alterations |
| 1894 | Buchanan Memorial Church and Hall | Oatlands | | Glasgow | Scotland | Repairs and alterations |
| 1894 | Free Church and hall | Kirkcudbright | | Kirkcudbrightshire | Scotland | Alterations |
| 1894 | Largo Parish Church | Upper Largo | | Fife | Scotland | Restoration |
| 1894 | Little Dovehill School | | | Glasgow | Scotland | Addition |
| 1894 | Medical School for Women | Kelvinside | | Glasgow | Scotland | |
| 1894 | Royal Insurance Company Building | | | Glasgow | Scotland | Competition design submitted - not successful |
| 1894 | Skelmorlie Boarding School | Skelmorlie | | Ayrshire | Scotland | Alterations |
| 1894 | The Knowe | | | Glasgow? | Scotland | |
| 1895 | Anderson's College Medical School | Kelvinhaugh | | Glasgow | Scotland | Additions |
| 1895 | Camis Eskan House | Craigendoran | | Dunbartonshire | Scotland | Alterations |
| 1895 | Dunholm | Skelmorlie | | Ayrshire | Scotland | |
| 1895 | Free West Church | Perth | | Perthshire | Scotland | Alterations and additions |
| 1895 | Hall-Brown, Buttery & Co's works | | | Glasgow | Scotland | |
| 1895 | Holy Trinity Church Hall | Bridge of Allan | | Stirlingshire | Scotland | |
| 1895 | Lennox Castle Inn | Lennoxtown | | Stirlingshire | Scotland | Reconstruction |
| 1895 | Lilybank House | Hillhead | | Glasgow | Scotland | Alterations and additions - N addition |
| 1895 | Martyrs Public School | | | Glasgow | Scotland | |
| 1895 | North Merchiston Established Church, with hall and beadle's house | Slateford | | Edinburgh | Scotland | Organ case and alterations |
| 1895 | Prestwick Free Church | Prestwick | | Ayrshire | Scotland | Addition of belltower - also some furnishings? |
| 1895 | St David's Parish Church hall | Kirkintilloch | | Dunbartonshire | Scotland | Addition of hall to church |
| 1895 | St Paul's Church mission hall | | | Glasgow | Scotland | |
| 1895 | West Free Church Hall | Perth | | Perthshire | Scotland | |
| c. 1895 | Store, Bishop Street | | | Glasgow | Scotland | |
| 1896 | Altskeith, Kinlochard | Aberfoyle | | Perthshire | Scotland | |
| 1896 | Auchamore House | | Gigha | Argyll | Scotland | Reconstruction after fire |
| 1896 | Belfast Town Hall | | | Belfast | Northern Ireland | Competition design submitted - not successful |
| 1896 | Bellahouston Dispensary | Bellahouston | | Glasgow | Scotland | |
| 1896 | Glasgow School of Art | | | Glasgow | Scotland | Won in competition and first phase completed |
| 1896 | House of Refuge | East Chapelton, Bearsden | | Glasgow | Scotland | Additions |
| 1896 | Kilmadock Parish Church | Doune | | Perthshire | Scotland | Alterations |
| 1896 | Magdalene Home and Females House of Refuge | Lochburn | | Glasgow | Scotland | Alterations and baths |
| 1896 | Miss Cranston's Tea Rooms, Buchanan Street | | | Glasgow | Scotland | Interior decorations - mural stencils (Mackintosh responsible) |
| 1896 | Paisley Technical School | Paisley | | Renfrewshire | Scotland | Second and third premiated competition designs |
| 1896 | Pettigrew & Stephens Department Store | | | Glasgow | Scotland | Major reconstruction of existing warehouse |
| 1896 | Queen's Cross Church | | | Glasgow | Scotland | |
| 1896 | Saracen Tool Works, Gallowgate, Great Dovehill | | | Glasgow | Scotland | |
| 1896 | Shop, 401 Sauchiehall Street | | | Glasgow | Scotland | |
| 1897 | 11 Margaret Street | Greenock | | Renfrewshire | Scotland | |
| 1897 | Biggar Manse | Biggar | | Lanarkshire | Scotland | Elevations? |
| 1897 | Craigiehall | Bellahouston | | Glasgow | Scotland | Interior of music room |
| 1897 | Craiglee | Dennistoun | | Glasgow | Scotland | Alterations and additions |
| 1897 | Foreign and British Aerated Water Company Factory | | | Glasgow | Scotland | |
| 1897 | Kirkintilloch Public School | Kirkintilloch | | Dunbartonshire | Scotland | |
| 1897 | Scottish Alliance Insurance Company | | | Glasgow | Scotland | Alterations |
| 1897 | Tenement, Catherine Street | | | Glasgow | Scotland | Outside WCs added |
| c. 1897 | Kilmacolm Manse | Kilmacolm/Kilmalcolm | | Renfrewshire | Scotland | |
| c. 1897 | Kilmadock Parish Manse | Doune | | Perthshire | Scotland | |
| c. 1897 | Skelmorlie Bank | Skelmorlie | | Ayrshire | Scotland | Alterations |
| 1898 | 12 Claremont Gardens | | | Glasgow | Scotland | Alterations |
| 1898 | 233 St Vincent Street | | | Glasgow | Scotland | Alterations |
| 1898 | 3 Montgomerie Crescent | | | Glasgow | Scotland | Alterations |
| 1898 | Belhaven UP Church | Dowanhill | | Glasgow | Scotland | Alterations |
| 1898 | Brechin Cathedral | Brechin | | Angus | Scotland | Restoration, alterations and additions (continued under Honeyman, Keppie & Mackintosh) |
| 1898 | Cottage for Alfred A Todd | Bridge of Weir | | Renfrewshire | Scotland | |
| 1898 | Dining Room Interior for Hugo Bruckmann | | | Munich | Germany | |
| 1898 | Ferndean for Dr John Calderwood | Barrhead | | Renfrewshire | Scotland | |
| 1898 | Glasgow International Exhibition of 1901 | Kelvingrove | | Glasgow | Scotland | Competition design - unplaced |
| 1898 | Miss Cranston's Tea Rooms, Argyle Street | | | Glasgow | Scotland | Furniture |
| 1898 | National Bank of Scotland | | | Glasgow | Scotland | Unsuccessful competition design |
| 1898 | North Berwick Church Hall | North Berwick | | East Lothian | Scotland | |
| 1898 | Principal's House | University Gardens | | Glasgow | Scotland | Addition of porch |
| 1898 | Redlands | Bridge of Weir | | Renfrewshire | Scotland | |
| 1898 | Ruchill Street Free Church Mission Halls | | | Glasgow | Scotland | |
| 1898 | Skelmorlie Parish Church | Skelmorlie | | Ayrshire | Scotland | Pulpit and other fittings |
| 1898 | Westdel and Royston | Dowanhill | | Glasgow | Scotland | Interior of a bedroom and bathroom for Westdel (Mackintosh responsible) |
| 1899 | 101-103 St Vincent Street | | | Glasgow | Scotland | Alterations |
| 1899 | 14 Lansdowne Crescent | | | Glasgow | Scotland | Alterations |
| 1899 | CAthedral Square UP Church | | | Glasgow | Scotland | Alterations |
| 1899 | Gourock Parish Church | Gourock | | Renfrewshire | Scotland | Extension/pulpit and choir stalls |
| 1899 | Manse at Govan | Govan | | Glasgow | Scotland | Alterations? |
| c. 1899 | 53 Muslin Street | | | Glasgow | Scotland | |
| 1900 | 224 St Vincent Street | | | Glasgow | Scotland | Alterations and additions |
| 1900 | 73 John Street | | | Glasgow | Scotland | Alterations |
| 1900 | Daily Record Building | | | Glasgow | Scotland | |
| 1900 | House at Kilmacolm (Altondyke?) | Kilmacolm/Kilmalcolm | | Renfrewshire | Scotland | |
| 1900 | Lilybank House | Hillhead | | Glasgow | Scotland | Additions |
| 1900 | Premises of West of Scotland Furniture Manufacturing Co | Beith | | Ayrshire | Scotland | Alterations |
| 1900 | Prison Gate Mission Home | | | Glasgow | Scotland | New laundry chimney, alterations and repairs |
| 1900 | St Bryde's House | Howwood | | Renfrewshire | Scotland | Brick addition |
| c. 1900 | Tenement, 324-328 Gallowgate | | | Glasgow | Scotland | Alterations and additions to tenement premises |
| Late 1900 or early 1901 | Glasgow and West of Scotland Technical College | | | Glasgow | Scotland | Competition design submitted after invitation - unsuccessful |
| 1901 | Auchenbothie house, stables, gate lodge, cottage etc | Kilmacolm/Kilmalcolm | | Renfrewshire | Scotland | Gate lodge - Mackintosh probably responsible, whilst assistant |
| 1901 | Aytoun House | Kelvinside | | Glasgow | Scotland | |
| 1901 | Monkton | | | | Scotland | Additions - billiard room, outbuildings etc |
| 1901 | Tower Building | | | Glasgow | Scotland | Shopfront alterations |
| 1901 | Workmen's cottages | Tulloch | | Perthshire | Scotland | |
| c. 1901 | Aytoun House | | | Glasgow | Scotland | Addition to no 3 |