Boulton & Paul Ltd was a British general manufacturer from Norwich, England that became involved in aircraft manufacture.
Jeld Wen Inc. bought Boulton & Paul (along with another joinery company John Carr) from the Rugby Group plc in 1999 to form its British subsidiary.
The company's origins date back to an ironmonger's shop founded in 1797 in Norwich by William Moore. William Staples Boulton joined the ironworks firm of Moore & Barnard in 1844. By 1870 Boulton had been elevated to a partner alongside of John Barnard and the firm was renamed to Barnard & Boulton. A later partner in the firm was Joseph Paul, and the firm was again renamed to Boulton & Paul Ltd, which started its construction engineering division in 1905. By the early 1900s, Boulton & Paul Ltd had become a successful general manufacturing firm.
During the Second World War it was a major producer of prefabricated buildings, wire netting and wooden sub-assemblies of aircraft. In 1942 the Midland Woodworking Company of Melton Mowbray became a subsidiary. Richard Jewson of the Jewson timber merchants and former Lord Mayor of Norwich was a member of the board until retiring in 1947.
In 1915, Boulton & Paul began to construct aircraft under contract including 550 of the Royal Aircraft Factory FE.2b. Fe.2 construction was passed over to another East Anglian company so Boulton Paul could concentrate on production of more advanced designs. Their extensive use of jigs and the manufacture of the smaller fittings required meant that they could maintain fast production. A new production site was built and an assembly and proving ground developed on Mousehold Heath in Norwich rather than transport the aircraft to the Army at Thetford. During the war the company built more Sopwith Camels than any other manufacturer. Success as a builder of aircraft led to the company forming a design department but none of its resulting aircraft made a significant impact while the war lasted. The P.3 Bobolink fighter was overshadowed by the Sopwith Snipe and the Armistice beat the P.7 Bourges fighter-bomber into production.