Devizes utility room extensions, designed and built
Devizes homeowners can use us for the whole utility room extension project: survey, design, planning or permitted development checks, building regulations and the build itself.
- Guide price in DevizesFrom £14,000 inc VAT
- PlanningOften permitted development (3–4 m), or prior approval up to 6–8 m
- Build time6–10 weeks on site
- Postcode districtsSN10

Local to Devizes
Our survey diary covers Devizes, including SN10. Nearby, we also take on projects in Melksham (7 miles), Calne (7 miles), Trowbridge (10 miles), Chippenham (10 miles).
South West homes range from terraced streets in the cities to stone cottages and bungalows in the countryside, and conservation areas are common in historic centres.
Guide prices for Devizes
For Devizes we adjust our national guide rates by ×1.02, the factor we use for South West England. Figures include VAT; your written quote after the survey replaces them.
Typical rates in Devizes: £1,940 to £3,570 per m² including VAT, depending on specification.
| Size | Essential | Standard | Premium |
|---|---|---|---|
| 2 m × 2.5 m 5 m² | £14,000 – £17,000 | £14,000 – £18,000 | £14,000 – £18,000 |
| 2.5 m × 3.2 m 8 m² | £15,500 – £18,500 | £18,000 – £23,000 | £22,500 – £29,000 |
| 3 m × 3.6 m 11 m² | £21,000 – £25,500 | £25,000 – £31,500 | £31,000 – £39,500 |
Want a range for your exact size? The guide-price tool takes about a minute.
Planning rules that apply in Devizes
In England a single-storey rear extension can usually go up to 3 m beyond the original rear wall of a semi-detached or terraced house, or 4 m on a detached house, without a planning application, provided it is no more than 4 m high, keeps eaves to 3 m within 2 m of a boundary and, with other buildings, covers no more than half the land around the original house. The larger home extension prior approval scheme raises those depths to 6 m and 8 m, with neighbours notified and a 42-day decision.
Before any drawing is finalised we check whether the house is listed, in a conservation area or subject to an Article 4 direction.
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.
Applications are decided by the local planning authority (your district, borough or unitary council).
Included in a typical project
- Back door and a hard-wearing floor
- Ventilation for a tumble dryer
- Built-in storage or space ready for your units
- Waste and water connections
- Design around appliances, sink and storage
From first visit to completion
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
First, a site visit: we look at the house, garden, access and drains and listen to what you need.
Design and approvals
We produce the drawings and structural design, and manage the approvals so they are in place before work starts.
Fixed written price
We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.
Build and sign-off
The build is managed from start to finish, inspected at each stage and signed off on completion.
Questions people ask about utility room extensions
Do you cover all of Devizes?
Yes. We cover Devizes and the surrounding parts of Wiltshire. Site visits are free and there is no obligation.
Will my neighbours in Devizes 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.
Can I see a price before committing to anything?
Yes. The guide prices on this page are adjusted for Devizes, and the guide-price tool gives a range for your own size. After the survey you get a written price before anything is agreed.
How much does a utility room extension cost?
Our guide range is about £1,940 to £3,570 per m² including VAT, with a minimum of around £14,500. An 8 m² standard-spec utility is typically £18,000 to £23,000 in Devizes.
Can a utility have a toilet?
Yes, space permitting. A WC needs drainage and extraction, which we plan into the design.
Book a free site visit in Devizes
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.