House Extensions
House Extensions in Birmingham & the West Midlands
From a single-storey kitchen extension to a full double-storey addition, CH Developments designs and builds house extensions across Birmingham and the West Midlands that add real living space and value, with one team handling the structure, the build and the finish.
Overview
Extending is almost always better value than moving once you factor in stamp duty, agents' fees and the upheaval of a sale. The right extension reworks how your whole home flows rather than just bolting on square metres, which is why we look at the existing layout alongside the new space and how the two will join.
We handle the full job: the structural openings and steelwork that open the house up, the foundations, brickwork and weatherproofing, and the internal finish that ties old and new together so the join is invisible. Most rear and side extensions involve a steel beam (RSJ), new foundations to Building Control depth, and glazing such as bi-fold doors or a roof lantern to pull light into the deeper plan.
One team manages the trades and the programme from the first site visit to the final coat of paint, so the work stays sequenced and the site stays tidy. We build extensions across Birmingham, Solihull, Sutton Coldfield, Coventry, Redditch and the wider West Midlands, work to current Building Regulations throughout, and are CHAS-accredited, fully insured and backed by a workmanship guarantee on completed work.
What's included
- Structural openings, steelwork and knock-throughs
- Foundations, brickwork and weatherproofing
- Bi-fold and sliding doors, roof lanterns and rooflights
- Plastering, electrics, plumbing and heating
- A brick, render and roof finish that matches your property
- Building Control inspections and sign-off
- Planning and party-wall paperwork handled for you
Your Options
Types of extension we build
Single-storey rear
The classic kitchen-diner extension across the back of the house, often opened up with bi-fold or sliding doors and a roof lantern for light.
Side return
Filling in the narrow side alley of a Victorian terrace or semi to create a wide, open-plan kitchen that uses the full width of the house.
Wrap-around
Rear and side return combined for a transformational ground-floor footprint and a genuinely open-plan living space.
Double-storey
Extra living space below and a bedroom or bathroom above, taking the best value from one set of foundations and one roof.
Over-structure
Building above an existing garage or single-storey section to add a room without losing any garden.
Good to Know
Planning, regulations and the practical side
The questions worth answering before the work starts. We handle the paperwork and the approvals as part of the job.
Do you need planning permission?
Many single-storey extensions fall under permitted development, but it depends on the depth, height, your property type and whether you are in a conservation area or under an Article 4 direction. We assess this for you and handle any planning application.
Party Wall agreements
If you build near or on a shared boundary, the Party Wall Act may apply and your neighbour needs formal notice. We flag this early and serve the notices so it never holds the build up.
Building Regulations and foundations
Every extension is signed off under Building Regulations, covering foundation depth, the steel beam design, insulation, drainage and fire safety. We build to those standards and book the Building Control inspections as part of the job.
What It Costs
What affects the price
Every project is different, so we do not publish one-size figures that rarely hold true. Instead we give you a free, fixed-price quotation after a site visit, so you know the full cost before any work begins. These are the main things that move the price:
- Floor area and whether it is single or double-storey
- Amount of structural steel and groundwork required
- Glazing: standard windows versus bi-folds, sliders and lanterns
- Kitchen, bathroom and internal finish specification
- Drainage diversions and how the roof ties into the existing house
Where We Work
Extensions across Birmingham & the West Midlands
We deliver home extensions throughout Birmingham & the West Midlands and the surrounding towns.
Questions & Answers
Extensions: common questions
How much does a single-storey extension cost in Birmingham?+
It depends on the floor area, the structural work, the glazing and the finish, so there is no single figure. We give you a free, fixed-price quotation after a site visit, so you know the full cost before any work starts.
Do I need planning permission for an extension?+
Many single-storey extensions are permitted development, but it depends on the size, your property and whether you are in a conservation area. We assess it for you and handle the planning application and building-regulations approval if they are needed.
How long does an extension take?+
A typical single-storey extension runs to a number of weeks, with double-storey work taking longer. We give you a realistic programme with your quotation and keep you updated at each stage.
Will the extension match my existing house?+
Yes. We source matching or sympathetic brick, render and roof tiles, and detail the junction between old and new so the extension reads as part of the original house rather than an add-on.
Do you handle the structural design and steelwork?+
We do. We work with a structural engineer for the beam and foundation design, install the steelwork and openings, and carry the work through Building Control sign-off as one job.
Does a house extension add value?+
A well-built extension usually adds both usable space and value, though how much depends on the quality of the work, your area and not over-developing the plot. We detail the junction so the extension reads as part of the original house, which is what protects resale value, and we are happy to talk through what makes sense for your property.
Written and reviewed by
Atif Ali
Lead Builder, CH Developments
Atif Ali has worked in construction for over seven years and leads CH Developments projects from the first site visit to final sign-off. His clients stay with him: the average customer has worked with CH Developments for more than three and a half years, and most new work comes through referrals from existing customers.
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Tell us about your project and we'll be in touch to arrange a free, no-obligation site visit across Birmingham and the West Midlands.
Contact details
- Registered office36A Birchensale Road
Redditch, Worcestershire
B97 6JS - Phone07857 039700
- Opening hoursMon–Fri 8:00–18:00 · Sat by appointment
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