A well-designed extension doesn’t just add rooms — it changes how your family lives. More space for entertaining, more room for the kids, more comfort every single day.
An extension isn’t a building project. It’s a decision about how you want to live — and who you want to be at home.
A kitchen where the whole family can be together. A living room that isn’t overflowing. A home that fits how you actually live — not how you used to. An extension gives you room to breathe, and the daily quality of life that comes with it.
Moving to a larger home in East Yorkshire costs an average of £15,000–£30,000 in stamp duty, agent fees and transaction costs alone — and you still end up in someone else’s layout. An extension gives you the space you need, in the home and neighbourhood you love, at a lower total cost.
A well-executed extension adds 10–20% to your home’s value in the Yorkshire market — often more on larger family homes in sought-after villages. The investment works twice: you get a better home to live in today, and a more valuable asset for the future.
Every layout decision we make starts with how your family uses the space — how you entertain, where the kids do homework, how the light moves through the room. The result is a home that works for you, not a generic extension bolted on the back.
The most popular extension type. Typically creates an open-plan kitchen-dining-living space. From £30,000 in Yorkshire.
Significantly more space per pound spent than single-storey. Adds bedrooms upstairs while expanding the ground floor. From £60,000.
Infills the gap beside the house to widen the kitchen and create a brighter, more functional space. From £25,000.
Combines rear and side extensions for maximum ground-floor space. Transformative for family homes. From £55,000.
Adds bedrooms or bathrooms above an existing single-storey structure, garage or outbuilding. From £45,000.
Uses the footprint of an existing integral or attached garage to add habitable rooms at first floor. From £35,000.
All costs are approximate and Yorkshire-specific. Full cost guide →
We manage every trade in-house — groundworks, structural, roofing, first and second fix, plastering, decoration. No coordinating multiple contractors, no gaps in responsibility. One team, one point of contact, full accountability throughout.
Kegan has been delivering extensions and major construction projects in Hull and East Yorkshire for 15 years. SMSTS, CSCS and CITB qualified — the credentials matter, but it’s the depth of practical experience that sets the standard of work apart.
We leave the site clean at the end of every day, answer the phone, and price fairly. Three things the industry is consistently poor at. We just do them — without being asked.
T3 Developments offers a free, no-obligation site visit and quote for all extension projects across Hull and East Yorkshire.
