Home Extensions Across the West Midlands

Single-storey, side return, two-storey and build-over extensions — designed around how you live, built properly from the ground up, and priced with a fixed, itemised quotation.

More space, without the upheaval of moving

A well-designed extension is one of the best ways to add space and value to your home. Whether it’s an open-plan kitchen-diner, a bigger living room, an extra bedroom or a ground-floor bathroom, we take the build from groundworks right through to the finished room.

Behind Oaklight is around 20 years of building experience across the West Midlands. The same care that goes into our garden rooms goes into every extension: clear specifications, honest pricing and a tidy, well-run site.

What every Oaklight extension includes

Red brick single-storey rear extension with grey bi-fold doors

Extension Guide Prices

Every home is different, so these are starting points for a typical build. After a free site survey you’ll receive a fixed, itemised quotation — not a vague estimate.

Single-Storey Rear Extension

Typically around 3 × 4m — kitchen-diners, family rooms and open-plan living
£ 35,000 Starting guide price
  • Brick or rendered finish
  • Flat, pitched or lean-to roof
  • Bi-fold, sliding or French doors
  • Often possible under permitted development
Most popular

Side Return / Wrap-Around

Use the side passage, or wrap around the back for a large L-shaped kitchen and living space
£ 45,000 Starting guide price
  • Opens up narrow galley kitchens
  • Roof glazing for natural light
  • Steelwork to open up internal walls
  • Party wall matters explained up front

Two-Storey Extension

Extra living space downstairs and an extra bedroom or bathroom above
£ 65,000 Starting guide price
  • Ground and first floor in one build
  • Roofline designed to suit your house
  • Stairs, landing and layout changes
  • Usually needs planning permission

First-Floor Build-Over

Add a new room over an existing single-storey extension or garage
£ 40,000 Starting guide price
  • Existing foundations checked first
  • Bedroom, en-suite or home office
  • Brickwork and roof matched to the house
  • Less disruption at ground level

Extension styles we build

From brick matched to your home to modern cladding and zinc roofs — every finish can be tailored to your property, your budget and your local planning requirements.

Rendered single-storey rear extension with roof lantern
Rendered finish with roof lantern
Grey brick rear extension with zinc standing-seam roof
Grey brick with zinc standing-seam roof
Rear extension finished in grey composite cladding
Composite cladding
Timber-clad bungalow extension with standing-seam metal roof and large glazing
Timber-clad bungalow extension
Period-style brick wrap-around extension with arched detailing and bi-fold doors
Period brick wrap-around
Single-storey brick rear extension with two roof lanterns and bi-fold doors
Brick with roof lanterns and bi-folds

Images are illustrative of the styles and finishes available.

How your extension comes together

A clear, four-step process — so you always know what happens next and who is responsible for what.

1. Free site survey

We visit, measure up and talk through how you want to use the space, your budget, and any site issues such as drains, levels or access.

2. Drawings & approvals

Plans are drawn up and submitted for Building Control approval, plus planning permission if it’s needed. We recommend trusted structural engineers and private Building Control inspectors, who you appoint directly.

3. Fixed quotation

You receive a fixed, itemised quotation with a clear scope, listed exclusions and a staged payment schedule — so you know exactly what you’re paying for.

4. Build & handover

Our team builds from groundworks to the finished room, keeps you updated at every stage, and works with your inspector right through to sign-off.

Why homeowners choose Oaklight

20 years’ experience

Two decades of building across the West Midlands — garden rooms, extensions and alterations.

Honest, itemised pricing

Every quotation is broken down line by line, with exclusions spelled out — no surprises halfway through the build.

Staged payments

You pay in stages as the build progresses, against milestones agreed in your quotation before work starts.

Built to Building Regulations

Each key stage is inspected by Building Control, finishing with a completion certificate for your records.

Extension FAQs

Not always. Many single-storey rear extensions fall under permitted development — typically up to 3m deep on a semi-detached or terraced house and 4m on a detached house, with larger sizes possible through the prior approval route. Two-storey extensions, and some side extensions, usually need a full planning application. We’ll tell you which route is likely to apply at your survey, and you can always confirm with your local council.

Yes — almost every extension needs Building Regulations approval. An inspector checks key stages such as foundations, drainage, insulation and the finished build, then issues a completion certificate. We recommend reputable private Building Control inspectors and structural engineers; you appoint them directly, so their checks are fully independent of us.

It’s very common. If a public sewer runs under the footprint you’ll usually need a build-over agreement with the water company — Severn Trent across most of the West Midlands — and a manhole may need moving. We look for this at the survey and allow for any alterations in your quotation.

Your quotation is fixed and itemised, covering the build from groundworks through to a plastered finish ready for decoration. Anything not included — for example kitchen supply, flooring or professional fees — is listed clearly, so nothing is left to assumption.

Yes, most families stay at home. We build the new structure first and only open up into the house when we need to, which keeps disruption and dust to a minimum.

Payments are staged against clear milestones in the build, all set out in your quotation before any work starts.

We build across the West Midlands, including Birmingham, Sutton Coldfield, Walsall, Wolverhampton, the Black Country, Redditch, Warwick and Leamington Spa.

Thinking about an extension?

Book a free, no-obligation site survey and we’ll talk through your ideas, the approvals you’re likely to need and a realistic budget.