Helping homeowners make the most of their homes

Based in Fairfield and working across Teesside, William Sedgewick Developments Ltd provide both homeowners and commercial property owners with quality and comprehensive building services, including new builds, home extensions, conversions, renovations and refurbishments

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Highly skilled and experienced in general house extensions.

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Whether you need a room recreated or an entire house renovated, we can provide the solution and match the installations exactly to your requirements.

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New Builds

We have over 13 years experience in the building sector

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Our skilled team can turn that wasted space into exceptional living spaces, whether it is a bedroom, study or extra living room.

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Helping homeowners make the most of their homes is one of our key aims and we design, plan and build projects to make the full use of the space available. We make houses that fit in with your family rather than the other way round.

How Can We Help You?

Our diverse range of extensions, conversions and building services include:

•Single and double storey extensions
•Garage and loft conversions
•New build houses
•Kitchen and bathroom installations
•Bricklaying services
•Insurance claim work
•House refurbishment

We Can Help With Any Project Large or Small

Our highly skilled and experienced team of builders carry out all aspects of building services, from minor repairs to building an entire new property. Through our vast network of clients and contacts, we have also joined forces with an architectural company who will take you from the earliest concepts through to the finished construction, with everything designed just the way you want it.

Started in 2017, this family business has always been customer focused and professional and we aim to offer the best possible advice to our customers. Incredibly detailed estimates, great communication and superbly finished workmanship are just additional reasons why we have an extensive list of satisfied customers.

You can find details of our services on the tab at the top of this website.

Specialists in house extensions

All building work carried out


We were very impressed with the service that we received from Chris when we had our extension built.

We have been extremely impressed with Chris and his team throughout the whole process and would both recommend the company to others

Just to say we are really really pleased with the floor - it looks great and is such a massive improvement on what was there!