United States House of Representatives | White House | House of Lords | House of Representatives | Nottingham | House | House of Commons of the United Kingdom | Royal Opera House | Massachusetts House of Representatives | Second Vatican Council | Florida House of Representatives | World Boxing Council | United States National Research Council | National Research Council | Speaker of the United States House of Representatives | Sydney Opera House | Australian House of Representatives | Privy Council of the United Kingdom | Random House | British Council | House (TV series) | House of Habsburg | Minnesota House of Representatives | University of Nottingham | House of Hohenzollern | House of Bourbon | Council of Trent | Council of Europe | Pennsylvania House of Representatives | National Security Council |
Howitt is chiefly remembered for designing prominent public buildings, such as the Council House and Processional Way in Nottingham, Baskerville House in Birmingham (first phase of the unrealised Civic Centre scheme), Newport Civic Centre, and several Odeon cinemas (such as Weston-super-Mare and Bristol).