He was re-elected in the subsequent general elections of 1950, 1951, 1955, 1959, 1964, 1966 and 1970. His head for figures and tenacity made him a good candidate for Chairman of the Public Accounts Committee in the House of Commons, succeeding Harold Wilson in this post after Wilson was elected Leader of the Labour Party in 1963. When, after 13 years in government, the Conservative Party was defeated in October 1964, Houghton became a cabinet minister in Wilson's first government and was appointed a Privy Counsellor.