[1] From 1699 McGill was involved on work at Kellie Castle, Angus, in association with Alexander Edward, and from 1700 with Smith at Yester House in East Lothian.
At the House of Nairn, McGill completed William Bruce's design after the latter's death.
[1] His own designs include those of Donibristle House in Fife, Blair Drummond (1715–17), which was demolished in 1870, and a town house for James Graham, 1st Duke of Montrose in Glasgow's Drygate (demolished 1855).
McGill designed the original Mount Stuart House on the Isle of Bute for John Stuart, 3rd Earl of Bute, which was later remodelled by William Adam, before burning down, leaving only McGill's pavilions.
[1] In November 1720 McGill became the first City Architect of Edinburgh, with a salary of £50 a year, at least until the pay was discontinued during lean times in 1725.