Dutch-engineered · installed in the UK
More space, without the building site.
House extensions and dormer lofts, precision-built in our Netherlands factory and installed at your home in days — not months. One fixed price, in writing, VAT included.
- Extensions installed in 5 days, from £35,000
- Dormer lofts craned in in a day, from £22,500
- Fixed price — the quote is what you pay
- 10-year structural guarantee, building regs handled
New — the UK's first true extension configurator
Build your extension online. See your price instantly.
Pick your size, cladding, glazing and finishes and watch the fixed price update live — no email address, no callback, no waiting for a salesperson. When you're happy, request your written quote in one click.
Price my extension
How it works
- 1
Free design consultation
Video or home visit. We measure, listen, and check your permitted development rights for free.
- 2
Fixed quote & drawings
Your design, your finishes, one fixed price. We handle planning, building regs and party wall notices.
- 3
Built in our factory
Your extension takes shape indoors — insulated, glazed and finished to Dutch standards — while your life continues undisturbed.
- 4
Installed in days
Our crane lifts it into place. Watertight on day one, finished and handed over within the week.
Curious about the details — planning permission, foundations, the factory? See how it works, step by step →