Extra bedroom and en-suite extensions in Sutton Coldfield
Thinking about an extra bedroom and en-suite extension in Sutton Coldfield? We design it, take it through the approvals it needs and build it, with one team responsible from the first visit to the final certificate.
Before you start in Sutton Coldfield, here's what applies.
- Postcode districts
- B72, B73 and B75
- County / area
- West Midlands, England
- Price region
- West Midlands
- Guide price
- £56,000–£75,500 (£2,000–£2,700 per m²), plus £5,500–£11,000 for the en-suite
- Approval route
- It may be permitted development if it goes no more than 3 m beyond the original rear wall (counting any single-storey part) and stays 7 m from the rear boundary; otherwise it needs planning permission.
- Nearest towns
- Streetly (3 miles), Castle Vale (3.4 miles), Washwood Heath (4.6 miles)
- Distance to Birmingham
- about 6.9 miles
- First visit
- Free, no obligation
About an extra bedroom and en-suite extension
This service suits you if you need another bedroom, or want a main bedroom with its own bathroom, without converting the loft or moving. You get a first-floor layout that connects well to your landing, an en-suite designed for plumbing and ventilation, a useful room downstairs, the approvals your nation needs and the build, managed by us and carried out by vetted teams working under S&K.
Around Sutton Coldfield we also work in Streetly, Castle Vale and Washwood Heath, and across the rest of the West Midlands. Postcode districts in and near Sutton Coldfield: B72, B73 and B75.
What it costs in Sutton Coldfield
In the West Midlands, which includes Sutton Coldfield, we'd expect an extra bedroom and en-suite extension to cost around £56,000–£75,500 (plus £5,500–£11,000 for the en-suite) for a 4 m × 3.5 m footprint on two floors (28 m² of new floor space), or £2,000–£2,700 per m² including VAT. Steelwork for wide openings is the item most likely to move the figure; we'll know once the engineer has designed it.
| Spec | Per m² | A 4 m × 3.5 m footprint on two floors (28 m² of new floor space) |
|---|---|---|
| Essential | £1,840–£2,480 per m² | £51,500–£69,500 |
| Standard | £2,000–£2,700 per m² | £56,000–£75,500 |
| Premium | £2,400–£3,240 per m² | £67,000–£90,500 |
Planning and building regulations in Sutton Coldfield
In England, an extra bedroom extension at the rear can be permitted development if it goes no more than 3 m beyond the original rear wall and stays 7 m from the rear boundary. Upper side windows, including en-suite windows, must be obscure-glazed and non-opening below 1.7 m. Side or deeper designs need planning permission, costing £548 (or £575 for applications made from 8 December 2026).
Approval in England: Householder planning application: £548 (or £575 for applications made from 8 December 2026). Lawful development certificate: £274 (about £288 for applications from 8 December 2026). Councils should decide householder applications within 8 weeks of validation.
Building regulations: Building regulations approval (full plans recommended) from the council or a registered building control approver, with a completion certificate at the end.
Design points for Sutton Coldfield homes
Planning the en-suite
An en-suite needs a route for the soil pipe to the drains, enough fall for waste water and an extract fan to the outside under Part F. Placing it over the ground-floor utility or near an existing drain keeps pipework short and hidden.
Escape window and fire safety
A new first-floor bedroom needs an escape window with a clear opening of at least 0.33 m², at least 450 mm wide and high, and the bottom no more than 1,100 mm above the floor, unless there is a protected route to the stairs. We design the windows to meet this.
How we'd run your project
Free site visit
We visit your home in Sutton Coldfield, look at the structure, access and boundaries, and talk through what you want the new rooms to do.
Drawings and permission
Our designers produce plans and elevations, then we take care of planning or permitted development checks with the council covering Sutton Coldfield.
Detail and price
Construction drawings, engineer's calculations and building control sign-off, then a written fixed price for the build.
On site
One project lead runs the job, keeps you updated and arranges inspections at each stage until completion.
Questions about extra bedroom and en-suite extensions in Sutton Coldfield
How long does an extra bedroom and en-suite extension take?
Allow 4 to 8 weeks for survey and design, then the approval period (councils should decide householder applications within 8 weeks of validation), then 4 to 8 weeks of technical design, which can overlap. The build itself usually takes 14 to 20 weeks, longer for large or complex designs.
How much does an extra bedroom and en-suite extension cost in Sutton Coldfield?
Our guide for the West Midlands, which covers Sutton Coldfield, is £2,000–£2,700 per m² including VAT. A typical project with a 4 m × 3.5 m footprint on two floors (28 m² of new floor space) comes to about £56,000–£75,500 (plus £5,500–£11,000 for the en-suite). Design and approval fees are extra, and we fix the build price in writing once the design is agreed.
Who handles building regulations for a project in Sutton Coldfield?
We handle it as part of the project. What's needed in England: building regulations approval (full plans recommended) from the council or a registered building control approver, with a completion certificate at the end. We prepare the drawings and the engineer's calculations, book the inspections and pass you the completion paperwork at the end.
How big should a new double bedroom be?
There is no legal minimum size for a bedroom in a house you own, so the test is whether it works. A comfortable double needs room for the bed with space to walk round it, wardrobes and a door that opens freely. We draw furniture on the plans so you can judge the space before anything is built.
Does an extra bedroom add value to my house?
It usually does, though not always by the full cost. Nationwide's 2025 research found that adding a double bedroom to a two-bed house was linked to about 13% higher value, and a double bedroom and bathroom on a three-bed, one-bathroom house up to 24%. Local ceiling prices still apply.
Nearby
We also cover places near Sutton Coldfield, including:
Other extensions in Sutton Coldfield
All two-storey extension services in Sutton Coldfield · Extra bedroom and en-suite extensions across the West Midlands
Book a free site visit in Sutton Coldfield and we'll tell you what's possible, what approvals you need and what the design stage would cost.