Federation of Master Builders

Mr Ali Karadeniz

Thornbury &amp; 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&#39;re expanding your home or developing a commercial space, Thornbury &amp; Crown is here to build with care, skill, and pride—creating spaces that are built to last and crafted to impress.

During Construction

Finished Refurbs

Extensions/Lofts

Bathrooms

Thornbury & Crown Ltd

First week work in my flat was progressing , after 3 weeks when work wasn’t finished still l15%  left of the items covered in the contract  left  but when I stupidly being naive and made a full payment. Archi / his team decided not to continue and without saying anything just disappeared, leaving me without agreed earlier electricity.. Now 5 months gone when I’m contacting Archie who didn’t return my reporting damages to my flat as result of Thornbury Crown work ( water leaks, floor swallowing, cracks in the walls, etc, ) I’m  being ignored.  Please avoid. Awful experience

Renovation of 1bedroom flat

I hired Thornbury & Crown for a full renovation of a project flat. Erti, who leads the team, was my main point of contact and supported me throughout a complex process.

He was always responsive, patient, and clear—whether by message, call, or on-site. When issues arose or something didn’t meet expectations, he approached everything with a positive, solution-driven mindset.

The final result is excellent. He also gave valuable advice to optimise the space and recommended trusted suppliers without pressure.

I highly recommend Erti for his professionalism, reliability, and strong human approach

Flat Renovation

This company recently redid my bathroom and I couldn’t be happier with the result. They removed the old bathroom, completely redesigned the space, retiled, and even sourced all the materials. The price was very fair, the team was super friendly, and they stuck to the times they promised. Overall they were extremely reliable and I’m really pleased with the finished job. Highly recommend.

Bathroom remodel - Excellent experience 

The team at Thornbury & Crown we're recommend by a friend and they certainly delivered. 
From brilliant communication and fair pricing. 
To great craftmenshipI couldn't be happier. 
Such a hard working team they even finished ahead of schedule.
We wont be going elsewhere for future projects. 

 kitchen renovation. 

Recommended by our local group chat and didn’t disappoint.

They were very easy to deal with, communication and transparency from start to end was 10/10.

Even when there were unforeseen events we were kept in loop and reassured.

Project was on budget, on time and most important part of all - finished to an
incredibly high standard.

Would highly recommend.

P.s.

The kitchen was manufactured and fitted by Thorbury

 

Rear extension and kitchen remodel

 We agreed date and price  they actually turnt up on the day which is hard to find these days  , very reliable and on time ,  the quality of  work was top notch and most impressive was very good communication throughout. Highly recommended tecomended 

East and bull barbers 

Average score based on 3 reviews in the last 12 months

Services offered by Thornbury & Crown Ltd, working as Builder

Thornbury & Crown Ltd | Builder | London | Checkatrade

Thornbury &amp; 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&#39;re expanding your home or developing a commercial space, Thornbury &amp; Crown is here to build with care, skill, and pride—creating spaces that are built to last and crafted to impress.

Thornbury &amp; 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...

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