Single-storey extensions in Castle Bromwich

What should you know before starting in Castle Bromwich?

In Castle Bromwich, Solihull 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 Solihull 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.
Wide glazed doors and roof lights make the biggest difference to how bright the new room feels, and to the final price.

Postcode district: B36
Planning and building control: Solihull Council
From our West Bromwich base: 9 miles

Options to consider in Castle Bromwich

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.

Side or side-return extension

Uses the strip of land beside the house, often a passage or driveway. Under permitted development a side extension can be up to half the width of the original house and no more than 4 metres high. On a terrace with a narrow side return, it can widen a galley kitchen considerably without eating into the garden.

Single-storey extensions prices in Castle Bromwich

For a home in Castle Bromwich, 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. A free survey turns this guide into a fixed, itemised price.

Single-storey extensions in Castle Bromwich: common questions

How long does a single-storey extension take?

Allow 8–12 weeks on site for most single-storey extensions, plus time beforehand for drawings and approvals. If you need a planning application or a lawful development certificate, councils aim to decide within 8 weeks. Glazing and steel are ordered early so they arrive when the shell is ready, which keeps the build from stalling halfway.

Which postcodes in Castle Bromwich do you work in?

We cover B36 and the streets around them. If you're on the edge of Castle Bromwich, neighbouring Castle Vale and Stechford are covered too.

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 Castle Bromwich?

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

Also covering nearby

Other work we do in Castle Bromwich

Get a guide price for your Castle Bromwich extension in a couple of minutes, then a fixed price for the agreed specification after the survey.