Alexander Hamilton Scott was born in Paisley, Renfrewshire, Scotland on 30 August 1876. He was articled to Peter Caldwell in Paisley from 1890 to 1895 and remained with him for a further year as his assistant. He also attended Paisley School of Art. He then worked as an assistant to Robert Wemyss (1865-1955) in Glasgow and to James Archibald Morris (1857-1942) in Ayr in 1896; and to David Morrison Barker (1858-1933) in Glasgow, and to William Baillie (1875-1951) in Glasgow in 1897.
in 1897 Scott was appointed architect to the Caledonian Railway Company Architect's and Engineer's Department. He left the following year to take up the post of architect to the architectural and civil engineering firm Babtie & Bonn in Glasgow. He remained with the firm until 1906. The following year he joined forces with the Glasgow architectural and civil engineering firm Babtie, Shaw & Morton an entry for a competition to design buildings for the Scottish National Exhibition held in Edinburgh in 1908.
In 1908 Scott set up his own independent practice in Glasgow and in 1911 he was elected a Licentiate of the Royal Institute of British Architects (LRIBA). His address was given as 43 Mill Street, Paisley in 1911; and 103 Stevenson Drive, Shawlands, Scotland in 1923 and 1929. He died in Glasgow on 7 May 1929.
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Note: Alexander Hamilton Scott is sometimes confused with the English architect Augustine Alban Hamilton (1879-1944)