Single-storey extensions in Selly Oak

Before your single-storey extension in Selly Oak

In Selly Oak, Birmingham City 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 Birmingham City Council confirms in writing that a permitted development extension is lawful, which helps when you sell.
If you're building over or near a public sewer, the sewerage company has to agree before the foundations go in.
Under permitted development, a rear extension on a semi or terrace can usually project 3 metres from the original back wall, or 6 metres through the prior approval route.

Postcode district: B29
Planning and building control: Birmingham City Council
From our West Bromwich base: 6 miles

Choices to weigh up in Selly Oak

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.

Guide prices for Selly Oak

For a home in Selly Oak, 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. Your fixed price for the agreed specification follows a free survey at your Selly Oak address.

Before you book in Selly Oak

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.

Which postcodes in Selly Oak do you work in?

We cover B29 and the streets around them. If you're on the edge of Selly Oak, neighbouring Harborne and Edgbaston 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.

Will I need permission from the council in Selly Oak?

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

Single-storey extensions near Selly Oak

Other work we do in Selly Oak

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