Biggar was born in the County of Dumfries, Scotland, as a member of an ancient family of good repute. He was educated as a clergyman of the Church of Scotland, but gave up that profession in favor of farming. In 1806 he came to Canada with his wife, Mary Lauder, with whom he had eleven children. The Biggars first settled in Lincoln County and moved to Stoney Creek in 1810. Biggar was too old to serve in the War of 1812, but three of his sons volunteered for the militia. In 1816 Biggar moved to Brant County and purchased 100 acres near Mount Pleasant. He also established a tannery. When the town was to be named in 1825, Biggar suggested the name of "Biggarstown", but when other local dignitaries also suggested personalized names, "Brant's Ford" was chosen as a compromise.
Around 1825 Biggar built a brick house as the family home. Known as "Tall Trees", it still stands. It was the first home in Mount Pleasant to boast a piano.
Biggar died in 1837. His children were prominent in the affairs of Brantford, with Hamilton Biggar, the town's Methodist minister, serving as County Treasurer, and Herbert Biggar serving in the Legislative Assembly of Canada.
- Johnson, Crisfield (1879). History of Cuyahoga County, Ohio. With portraits and biographical sketches of its prominent men and pioneers. D. W. Ensign & Co.
- Jaeger, Sharon Anne; O'Byrne, Delia (2004). "The Works of Our Hands": Mount Pleasant, Ontario, 1799-1899: A History. Brant County Library. pp. 71–74.
- History of the County of Brant. Toronto: Warner, Beers, and Co. 1883. pp. 185–186.