Single-storey extensions in Warwick

What should you know before starting in Warwick?

Planning applications and lawful development certificates for Warwick go to Warwick District Council. Many single-storey extensions fall under permitted development, but not every house keeps those rights — conditions on newer estates, conservation areas and Article 4 directions can remove them. The structural work also needs Building Regulations approval, through the council's building control team or a registered building control approver.

Every extension needs Building Regulations approval, even when planning permission isn't required.
If you're building over or near a public sewer, the sewerage company has to agree before the foundations go in.
A lawful development certificate from Warwick District Council confirms in writing that a permitted development extension is lawful, which helps when you sell.

Postcode district: CV34
Planning and building control: Warwick District Council
From our West Bromwich base: 24 miles

Which option fits your home?

Wrap-around extension

Combines a side and rear extension into an L shape, giving the largest ground-floor gain. Because it extends both sideways and rearwards, a wrap-around normally needs a householder planning application rather than relying on permitted development. Expect more steelwork and a more involved roof where the two sections meet.

Utility, WC or boot-room extension

A smaller extension of 6–12 m² can take the washing machine, coats and a downstairs toilet out of the kitchen. Adding a WC means a new waste connection, so the position of the existing drains often decides the layout. It's a cost-effective way to free up the main rooms without a large build.

How much should you budget in Warwick?

Guide prices start at £28,000 and run to £90,000 depending on size and specification. A 4 m × 5 m rear extension on a semi, with roof lights and bifold doors: around £40,000–£52,000.

Guide prices for single-storey extensions
Option	Guide price	Good to know
Small rear or side extension (10–15 m²)	£28,000 – £40,000	Utility, WC or a modest kitchen extension
Rear kitchen-diner extension (18–25 m²)	£38,000 – £58,000	The glazing spec moves it within the range
Wrap-around or large extension (30 m²+)	£58,000 – £90,000	More steel and roof, and normally a planning application

Guide ranges include VAT where it applies. Access, parking and the state of what's there now can move the price — the survey settles it.

Your questions answered

How much does a single-storey extension cost in the West Midlands?

Most single-storey extensions in the West Midlands cost between £28,000 and £90,000, including VAT where it applies. A typical 4 m × 5 m rear kitchen-diner on a semi, with roof lights and bifold doors, usually costs £40,000–£52,000 built to a finish ready for decorating. Kitchen units, flooring and decorating are extra. After the free survey you get a fixed price for the agreed specification.

Do you cover Warwick?

Yes. Warwick (CV34) is about 24 miles from our West Bromwich base and inside the area we cover. Call 0800 088 6248 or send the form on this page to book a free survey.

What should I prepare before the survey?

Think about how you want to use the new space, and gather anything you have about the house: old plans, deeds showing boundaries, approvals for any earlier extension, and where you think the drains run. Photos of extensions you like help us price glazing and finishes accurately. If you're in a conservation area or on a newer estate, mention it, as it can affect permitted development.

Who approves single-storey extensions in Warwick?

Usually building control, and sometimes planning. Warwick District Council is the planning authority for Warwick; Building Regulations approval comes from its building control team or a registered building control approver. We'll tell you which applies after the survey.

Close to Warwick

Other home improvements in Warwick

Call 0800 088 6248 to talk through your extension, or send us a few details and we'll arrange a visit.