Lewis Henry Isaacs (3 January 1830 – 17 October 1908) was an English architect and surveyor and a Conservative Party politician who sat in the House of Commons from 1885 to 1892. Isaacs was the son of Isaac Isaacs of Devonshire Square. His mother was a daughter of Lewis Henry, a merchant, of Liverpool. Isaacs was educated at the Lancaster Royal Grammar School and at University College School, London. He became an architect and worked in partnership with Henry L. Florence. He was surveyor to Holborn Board of Works and for the Society of Gray's Inn for whom he designed rooms. Isaacs was the architect for The Farmiloe Building which was completed in 1868. In 1874, he designed Cadby Hall for J. Lyons & Co. which was built in West London. He was deputy chairman of Westcombe Park Estate Co and o