Single-storey extensions in Kenilworth

Before your single-storey extension in Kenilworth

In Kenilworth, Warwick District Council decides planning questions. We check permitted development limits and any local restrictions at the survey, then deal with the Building Regulations side so you receive a completion certificate when the work is signed off.

A lawful development certificate from Warwick District Council confirms in writing that a permitted development extension is lawful, which helps when you sell.
Most of the build happens outside, so the kitchen is usually only out of action for one to three weeks near the end.
Every extension needs Building Regulations approval, even when planning permission isn't required.

Postcode district: CV8
Planning and building control: Warwick District Council
From our West Bromwich base: 21 miles

Which options suit homes in Kenilworth?

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.

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 Kenilworth?

Prices in Kenilworth match the rest of our area: £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. Access, parking and the state of what's there now can move the price — the survey settles it.

Your questions answered

Can we live at home during the build?

Yes, most families stay at home throughout. For the first several weeks the work is outside and your house is closed off from it. The disruptive part is the break-through, when the back wall comes out and the kitchen may be out of action for one to three weeks. We agree a plan for a temporary sink and cooking space before that stage starts.

Which postcodes in Kenilworth do you work in?

We cover CV8 and the streets around them. If you're on the edge of Kenilworth, neighbouring Leamington Spa and Tile Hill are covered too.

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.

Who approves single-storey extensions in Kenilworth?

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

Nearby places we cover

Other home improvements in Kenilworth

Ready to see what fits? Send your postcode and a rough idea of the size, and we'll take it from there.