Thornbury & Crown is a proud family-run construction company based in London, with over 12 years of experience as main contractors. We specialise in high-quality home extensions, loft conversions, and commercial property projects—covering all areas within the A406, north of the River Thames.
As members of the Federation of Master Builders (FMB), we are committed to upholding the highest standards of quality, professionalism, and integrity in every aspect of our work. We take pride in adhering to the FMB’s strict code of practice—giving our clients peace of mind that their project is in trusted hands.
Our dedicated team—many of whom have been with us for over a decade—share a passion for delivering immaculate results with attention to detail at every stage. We prioritise clear communication, a personal touch, and a finish that reflects true craftsmanship.
Whether you're expanding your home or developing a commercial space, Thornbury & Crown is here to build with care, skill, and pride—creating spaces that are built to last and crafted to impress.