Single-storey extensions in Leamington Spa

Before your single-storey extension in Leamington Spa

Warwick District Council is the planning authority for Leamington Spa. If your plans need permission, apply early: householder applications have an eight-week target for a decision. Building Regulations approval and inspections run alongside the build.

Most of the build happens outside, so the kitchen is usually only out of action for one to three weeks near the end.
Wide glazed doors and roof lights make the biggest difference to how bright the new room feels, and to the final price.
If you're building over or near a public sewer, the sewerage company has to agree before the foundations go in.

Postcode district: CV32
Planning and building control: Warwick District Council
From our West Bromwich base: 25 miles

Which option fits your home?

Rear kitchen-diner extension

The usual layout: a 3–6 metre extension across all or part of the back wall, with the old rear wall replaced by a steel beam so the new and existing rooms become one space. Roof lights or a lantern bring daylight into the middle of the house, and bifold or sliding doors open onto the garden.

Flat roof or pitched roof

Flat roofs, usually GRP fibreglass or EPDM rubber, keep the height down near boundaries and suit roof lanterns. Pitched or lean-to roofs with tiles to match the house look more traditional and shed rain faster, but need more height. The choice affects permitted development limits, cost, and how much light reaches the existing rooms.

Guide prices for Leamington Spa

For a home in Leamington Spa, our guide range is £28,000–£90,000 depending on size and specification. A 4 m × 5 m rear extension on a semi, with roof lights and bifold doors: usually £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. We confirm a fixed price for the agreed specification after visiting.

Questions about single-storey extensions in Leamington Spa

What guarantees come with the extension?

Windows, doors, roof lights and roofing membranes come with manufacturers' guarantees, and the terms for each product are set out in your quote. Building control's completion certificate confirms the work met Building Regulations when inspected. If anything in our workmanship isn't right after handover, call us and we'll come back and look at it. Ask us for current insurance details with your quote.

Do you cover Leamington Spa?

Yes. Leamington Spa (CV32) is about 25 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.

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.

Who approves single-storey extensions in Leamington Spa?

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

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Book a free survey in Leamington Spa and we'll measure up, check the drains and boundaries, and give you a written, itemised quote.