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Bordesley Green, Birmingham B9 · covering 150 miles Mon–Sat 8am–6pm

West Midlands

East Midlands & Staffs

Further out

Birmingham150 mi10050 Up to 150 miles

Town not listed? If it's within 150 miles of Birmingham, we'll come and quote.

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Modern single storey rear extension with large glazed doors

House extensions in Birmingham

More room without the cost of moving. We draw it, get it approved and build it, with one team and one fixed price.

[4.9] on GoogleDrawings & planning in-houseFixed, itemised quotes

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Extension types

Which extension suits your home?

Most homes suit one of four types. We'll tell you which on the first visit.

  • Side view
    01

    Single storey rear

    The most popular choice. A bigger kitchen and family room that opens onto the garden.

    Good for: Kitchens, open-plan
  • Side view
    02

    Double storey

    Room downstairs and up. Often the best value per square metre if you need bedrooms.

    Good for: Bedrooms, en-suites
  • Plan view
    03

    Side return

    Uses the narrow alley beside terraced and semi-detached homes to widen the kitchen.

    Good for: Terraces and semis
  • Plan view
    04

    Wrap-around

    Side and rear together in an L-shape. The biggest change to how the ground floor works.

    Good for: Whole ground floor
Side elevationKey plan 40003000 45° Steel beamFoundations APPROVEDBuilding control Party wall CENTRAL BUILDINGSDesign · approve · buildProposed rear extensionSingle storey, flat roofDWG 01Rev A

One drawing, one team. The people who draw it are the people who build it.

Everything handled by one team

No separate architect, engineer and builder to chase. It's all us, under one fixed price.

  • 1Survey and drawingsMeasured on site, drawn by our own team.
  • 2Planning checksPermitted development or a full application.
  • 3Structural calculationsSteels and foundations signed off by an engineer.
  • 4Building controlInspections booked and the final certificate.
  • 5Party wall adviceWhat your neighbours need to know, and when.
  • 6The buildGroundwork to handover, with one project lead.
How it works

How it works

Four steps from the first visit to handover, with one team the whole way.

  1. Step 01

    Visit

    A free site visit. We measure up and listen.

    Free
  2. Step 02

    Design

    Drawings and a fixed, itemised quote.

    Fixed price
  3. Step 03

    Approve

    Planning, calcs and building control, done by us.

    We handle it
  4. Step 04

    Build

    One project lead and weekly updates to handover.

    Weekly updates
Before / after

Same house, four ways to extend.

Pick a type, then drag the handle to see the house before and after.

Plan my extension
BeforeAfter
Single storey rear: a full-width kitchen and family room with bi-folds and a roof lanternIllustration

What affects the cost?

Every extension is priced from its own drawings. These four things move the price most:

  1. 01Size, and whether it's one storey or two
  2. 02Glazing: bi-folds, roof lanterns and skylights
  3. 03Ground conditions and the foundations needed
  4. 04Kitchen, flooring and the level of finish

You get a fixed, itemised quote before any work starts.

Read our extension cost guide

Extension questions, answered.

The things people ask us most before they start.

Still not sure?

Talk to our team. We'll tell you honestly what's possible and what it will cost.

Ask a question

Most single storey extensions take around 10 to 14 weeks on site, and double storey around 14 to 20. Drawings and approvals come first, and we plan that time with you.

Yes, in most cases. We build the new shell first and only open into the house near the end, so the time without a kitchen is kept short.

Not always. Many single storey rear extensions fall under permitted development. We check on the first visit and handle the application if you need one.

Yes. Drawings, structural calculations, planning and building control are all done by our team, so you have one point of contact.

Yes. Once the drawings are done you get a fixed, itemised quote. If you change something later, we price the change before doing it.

Extensions across Birmingham and the Midlands

Based in Bordesley Green, we build extensions up to 150 miles from Birmingham.

  • Extensions in Birmingham
  • Extensions in Solihull
  • Extensions in Sutton Coldfield
  • Extensions in Wolverhampton
  • Extensions in Walsall
  • Extensions in Dudley
  • Extensions in West Bromwich
  • Extensions in Coventry
  • Extensions in Lichfield
  • Extensions in Tamworth
  • Extensions in Redditch
  • Extensions in Leicester
Birmingham150 mi10050 Up to 150 miles

Town not listed? If it's within 150 miles of Birmingham, we'll come and quote.

Check my area

Thinking about an extension?

Book a free site visit and get a fixed, itemised quote. No pressure, no obligation.

Let's talk about your project.

Tell us what you're planning. We'll call you back the same working day to book a free site visit.

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