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Single-storey house extensions
More space, without the compromise.
Single-storey extensions designed as part of the original architecture — resolved rooflines, matched materials and interiors that flow.
What you get
Designed around the way you live
Architectural resolution
Rooflines, eaves and thresholds drawn properly so nothing looks bolted on.
Engineer-led structure
Signed calculations and steel design included.
Planning taken care of
Permitted development assessed, applications prepared and submitted.
Flow through the house
We redesign the connection to existing rooms.
One project manager
A single named contact and a dated programme.
Fixed price and guarantee
No variations, and 10 years of written cover.
Recent work
Built in the North East
Included as standard
A single-storey extension, single point of responsibility
Design, approvals, engineering and build held by one family-run team on one fixed price.
- Free 4D Virtual DesignWalk through your extension before a single brick is laid.
- Planning permission handledWe prepare, submit and manage every application on your behalf.
- Building Regulations includedFull compliance documentation supplied as standard.
- Structural calculations includedEngineer-signed calculations built into your fixed price.
- Fixed-price quotationThe figure you agree is the figure you pay. No variations.
- 10-year guaranteeA decade of written cover on workmanship and structure.
Good questions
Frequently asked
How long does a single-storey extension take to build?+
Typically eight to fourteen weeks on site, after six to ten weeks of design and approvals.
Do you handle planning and Building Regulations?+
Entirely — drawings, applications and engineer-signed calculations are included in your fixed price.
Will the extension match the existing house?+
We source matched or deliberately contrasting materials and resolve every junction in the 4D model.
Flexible Payment Options
Flexible Payment Options
More ways to make your home improvement plans possible
If you would like to explore the payment options available, speak to one of our representatives who can provide further information and explain the options available to you.
Flexible Monthly Payments
Spread the cost over monthly payments, subject to status, eligibility and the applicable finance terms.
Ask About Payment Options
Payment options are subject to status, eligibility and the applicable finance terms. Finance is not guaranteed and is not available to every customer. Alpine Extensions is a credit broker, not a lender.
Start your project
Begin with a free 4D virtual design
Tell us a little about your home. We'll design your extension in 4D, price it to the pound and hand you a fixed quotation — with no obligation whatsoever.
- Design consultation at your home or online
- Photoreal 4D walkthrough of your new space
- Fixed-price quotation within 7 days