The business flourished and by the start of the twentieth century larger premises were required.  By a stroke of good fortune, nearby, on the corner of Revival Street and Woodall Street, a Salvation Army mission hall (the Old Halleluiah Mission Hall), built in 1865 and known locally as "The Old Hall", became available and the family purchased and moved into this in 1901.  In 1904, J & J Wiggin became a private limited company, employing some 30 people.  The range of items produced expanded to include curb chains and small brass and nickel castings.  In 1913, J & J Wiggin acquired the nearby business of V Brodhurst & Company, who manufactured bridle bits and stirrups.

On the outbreak of the First World War, the factory was converted to munitions production.  During the war, the company built a foundry, machine shop, warehouse and office block, for which James Thomas Wiggin laid a foundation stone in 1915, which can still be seen today.