Chester-le-Street bedroom extensions, designed and built
If you live in Chester-le-Street and want more space without moving, a bedroom extension is one of the most practical ways to get it. We handle the drawings, approvals and the build.
- Guide price in Chester-le-StreetFrom £23,500 inc VAT
- PlanningUsually a householder application
- Build time14–22 weeks on site
- Postcode districtsDH2, DH3
What should I budget for a bedroom extension in Chester-le-Street?
These guide figures apply our North East England adjustment (×0.91) to national rates. They include VAT at 20% and cover the build itself; design and council fees are listed separately.
Typical rates in Chester-le-Street: £1,460 to £2,910 per m² including VAT, depending on specification.
| Size | Essential | Standard | Premium |
|---|---|---|---|
| One bedroom 12 m² | £23,500 – £29,000 | £23,500 – £31,000 | £26,000 – £35,000 |
| Bedroom and en-suite 18 m² | £26,000 – £32,000 | £31,000 – £40,500 | £39,000 – £52,500 |
| Two rooms 30 m² | £43,500 – £53,500 | £51,500 – £67,000 | £65,500 – £87,500 |
For a figure based on your own dimensions, use our guide-price tool.
What is included
- Heating extended to the new rooms
- En-suite drainage and ventilation design
- Planning drawings and application
- Fire safety: escape windows and smoke alarms to building regulations
- Layout options: two-storey, over-garage or ground floor
- Structure, roof, insulation and finish
Do I need planning permission in Chester-le-Street?
In England a two-storey rear extension is permitted development only if it projects no more than 3 m from the original rear wall, sits at least 7 m from the rear boundary, matches the roof pitch and uses obscure, non-opening side windows upstairs. Most two-storey extensions therefore go through a householder planning application, which costs £548 from 1 April 2026 and normally takes about 8 weeks.
The planning position for a specific Chester-le-Street address depends on its history and any designations, which is why we check it at the first visit.
Building regulations approval is separate from planning. In England you can use the council's building control team or a registered building control approver; a full plans application gets the drawings checked before work starts, and the inspector signs the work off with a completion certificate.
If the work involves a shared wall, building on the boundary, or digging foundations within 3 m (sometimes 6 m) of a neighbour's building, the Party Wall etc. Act 1996 applies and notice must be served before work starts: two months for work to a party wall, one month for new walls on the boundary and for excavations.
Applications are decided by the local planning authority (your district, borough or unitary council).
Local to Chester-le-Street
We cover Chester-le-Street and the postcode districts DH2, DH3. We also work in nearby Stanley (5 miles), Durham (6 miles), Seaham (9 miles), Consett (10 miles).
Washington, in Tyne and Wear, is roughly 4 miles from Chester-le-Street and also on our list. Across the North East, houses often have rear yards or modest gardens, so compact, well-lit single-storey extensions make the biggest difference.
How the project works
Site visits are free and there is no obligation. Where drawings are needed, the design stage is priced in writing before it starts.
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
Design and approvals
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
Fixed written price
You receive a written, itemised price and programme. Nothing starts until you are happy with it.
Build and sign-off
We build it with one project manager, book the building control inspections and hand over the completion certificate.
Your questions about a bedroom extension in Chester-le-Street
Will my neighbours in Chester-le-Street be involved?
If a planning application or prior approval is needed, the council notifies neighbours. If the work is on or near a shared boundary, party wall notices may also be needed.
Do you cover all of Chester-le-Street?
Yes. We cover Chester-le-Street and the surrounding parts of County Durham. Site visits are free and there is no obligation.
How long does a bedroom extension take to build in Chester-le-Street?
On site, typically 14 to 22 weeks once approvals are in place. Before that, allow 8–14 weeks design and approvals.
Can I add a ground-floor bedroom for a relative?
Yes. A ground-floor bedroom with an accessible shower room is a common request. If it will be lived in as a self-contained home, planning treats it differently, so tell us how it will be used.
Does an en-suite need a window?
No, but it needs mechanical extraction that meets the building regulations. We design the duct route at the drawing stage.
Book a free site visit in Chester-le-Street
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.