Fletcher was educated at Harrow School and at Christ Church, Oxford, where he graduated with a Bachelor of Arts in 1864 and a Master of Arts in 1869, having been called to the Bar by Lincoln"s Inn the year before.
He joined the London County Council in 1889, became a deputy chairman in 1900 and left the council after another four years. On 17 May 1919, he was created a baronet, of Ashe Ingen Court, in the Parish of Bridstow, in the County of Hereford. Fletcher served as a Justice of the Peace for Middlesex and London.
Fletcher married Sara Clark, second daughter of Jonathan Clark in 1895.
They had no children and with his death the baronetcy became extinct.
27th United Kingdom Parliament. 28th United Kingdom Parliament. 29th United Kingdom Parliament.
30th United Kingdom Parliament]
Fletcher was appointed a member of the Hampstead Board of Guardians in 1876 and a chairman four years later, retiring from his post in 1898.
Fletcher entered the House of Commons in 1905, sitting as a Member of Parliament (Member of Parliament) for Hampstead until 1918.