He was born in Yeovil, Somerset, the son of Thomas Nathaniel Ashman and was educated at the Independent College, Taunton.
[citation needed] He later became head of his own company of Herbert Ashman & Co., leather factors, manufacturers and importers, based in Broadmead, Bristol.
[citation needed] He was the Liberal Councillor of St Paul's ward from 1890 to 1900 and elected Mayor of Bristol in 1898 and 1899.
[citation needed] He died at his home, Cook's Folly in Stoke Bishop, on 26 September 1914 after an operation for appendicitis.
He had married Eliza Lorenzo in 1874 and was succeeded by their son Frederick Herbert Ashman, who died shortly after him in 1916.