Ernest Grigg Heathcote was born in Sale, Cheshire, England on 8 October 1877. He was articled to his father, Charles Henry Heathcote (1850-1938) in Machester and remained with him as his assistant.
He commenced independent practice as an architect in Manchester in 1901 and was a partner, with his father and his brothers, Charles Harold Heathcote (1876-1960) and Edgar Horace Heathcote (1882-1929), in the architectural practice Charles Heathcote & Sons. The practice was initially based in Manchester, England, but had relocated to London by 1910.
Ernest Grigg Heathcote was elected a Licentiate of the Royal Institute of British Architects (LRIBA) in 1911 and a Fellow of the Royal Institute of British Architects (FRIBA) in 1917. He was Vice-President of the RIBA in 1922-23
His address was given as 64 Cross Street, Manchester in 1910; 110 Cannon Street, London in 1910 and 1914; 37 Princes Street, Manchester and 38 Westminster Mansions, London in 1914; 38, Parliament Street, London in 1923 and 1926; and Mansfield Chambers, St. Anne's Square, Manchester, and 19 Iddesleigh House, Caxton Street, Westminster, London in 1930 and 1932. He died in Budleigh Salterton, Devon, England on 19 November 1947
Lloyds Bank, Lancashire and Yorkshire Bank, and Westminster Bank, Manchester; insurance offices for Alliance, Eagle, Economic, Royal Friendly Society, Scottish Equitable, Royal London Friendly, Commercial Union, Cheshire Union, Norwich Union, Employers' Liability and others, Manchester; warehouses for Horrockses, Crewdson and Co., Hall and Higham, Joshua Hoyle and Co., and twenty others; Westinghouse Works, Carborundum factory, British Radiator Co.'s works. Ford's Motor Works at Manchester and Hammersmith, Cotton Storage, and several cold stores; Blind Asylum; Hospital for Incurables; many private houses; 500 Workmen's Dwellings and 30 storage warehouses; and many other works in different parts of England, and a few abroad. [Source: Who's Who in Architecture 1923]
Directory of British Architects 1834-1914. Compiled by Antonia Brodie, et al. Volume 1: A-K. London; New York: British Architectural Library, Royal Institute of British Architects/Continuum, 2001
Who's Who in Architecture 1923. Edited by Frederick Chatterton. London: The Architectural Press, 1923