Single-storey extensions in Erdington

Before your single-storey extension in Erdington

Planning applications and lawful development certificates for Erdington go to Birmingham City 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.

Detached houses get a little more room: 4 metres as standard, or up to 8 metres with prior approval.
If you're building over or near a public sewer, the sewerage company has to agree before the foundations go in.
Wide glazed doors and roof lights make the biggest difference to how bright the new room feels, and to the final price.

Postcode district: B24
Planning and building control: Birmingham City Council
From our West Bromwich base: 8 miles

Which option fits your home?

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.

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.

What does your single-storey extension cost in Erdington?

Expect to budget between £28,000 and £90,000 depending on size and specification in Erdington. A 4 m × 5 m rear extension on a semi, with roof lights and bifold doors: typically £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. A free survey turns this guide into a fixed, itemised price.

Questions about single-storey extensions in Erdington

Do I need to tell my neighbours about an extension?

You don't need their permission for permitted development, but you will usually need to involve them. Under the prior approval route the council writes to adjoining neighbours and gives them 21 days to comment. If the build is on the boundary or the foundations are deep and close to their house, the Party Wall Act requires formal written notice. A friendly conversation before any notice arrives usually makes everything smoother.

Which postcodes in Erdington do you work in?

We cover B24 and the streets around them. If you're on the edge of Erdington, neighbouring Castle Vale and Walmley are covered too.

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.

Does Birmingham City Council need to approve my single-storey extension?

Usually building control, and sometimes planning. Birmingham City Council is the planning authority for Erdington; 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 Erdington

Other work we do in Erdington

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