 A church committee-member during the building in 1928 of St Declan's Catholic Church, Penshurst, Radecki designed, produced and donated the stained-glass windows there, including a memorial window dedicated to his wife, who had died in 1919.On 8 January 1921 at the Church of Christ, Hurstville, Radecki married Sydney-born Jean Hughes (d.1944).During the 1920s J. Ashwin & Co. produced the stained glass for the impressive, vaulted ceiling of what became the Commonwealth Savings Bank in Martin Place to designs by Radecki.