Wraparound extensions for homes in Frome
A wraparound extension in Frome starts with the right design and the right approval route. We take care of both, then build it with our own project management.
- Guide price in FromeFrom £36,500 inc VAT
- PlanningUsually a householder application
- Build time14–20 weeks on site
- Postcode districtsBA11
Working in Frome
We cover Frome and the postcode districts BA11. We also work in nearby Bath (10 miles), Keynsham (15 miles), Nailsea (24 miles), Yeovil (24 miles).
Just over the Wiltshire border, Warminster is about 7 miles away. 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.
When a wraparound extension makes sense
- Terraced houses that want the largest ground floor possible
- Semi-detached houses with a side passage
- Families who want kitchen, dining and living in one space
How much does a wraparound extension cost in Frome?
These guide figures apply our South West England adjustment (×1.02) to national rates. They include VAT at 20% and cover the build itself; design and council fees are listed separately.
Typical rates in Frome: £2,040 to £3,770 per m² including VAT, depending on specification.
| Size | Essential | Standard | Premium |
|---|---|---|---|
| Compact L-shape 18 m² | £36,500 – £44,500 | £42,000 – £53,500 | £53,000 – £68,000 |
| Medium L-shape 25 m² | £51,000 – £61,500 | £58,500 – £74,000 | £73,500 – £94,500 |
| Large L-shape 32 m² | £65,000 – £78,500 | £75,000 – £95,000 | £94,500 – £121,000 |
For a figure based on your own dimensions, use our guide-price tool.
Do I need planning permission in Frome?
In England a wraparound extension is assessed as both a side and a rear extension, and the combination usually falls outside permitted development, so most need a householder planning application (£548 from 1 April 2026).
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.
Building over or within 3 m of a public sewer needs the water company's consent, usually through a build-over agreement, before the foundations go in.
Applications are decided by the local planning authority (your district, borough or unitary council).
What happens next
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
With the design and specification agreed, you get a fixed written price and a start date.
Build and sign-off
The build is managed from start to finish, inspected at each stage and signed off on completion.
Wraparound extension questions answered
Do I need building regulations approval in Frome?
Yes. Almost every extension needs it, whatever the planning route. We prepare the drawings and book the inspections.
How long does a wraparound extension take to build in Frome?
On site, typically 14 to 20 weeks once approvals are in place. Before that, allow 8–16 weeks design and approvals.
Can I see a price before committing to anything?
Yes. The guide prices on this page are adjusted for Frome, and the guide-price tool gives a range for your own size. After the survey you get a written price before anything is agreed.
Will I need to move a drain?
Often. Side returns frequently contain a manhole or a shared drain. Building near or over a public sewer needs the water company’s consent in England and Wales, which we arrange.
How much does a wraparound extension cost?
Our guide range is about £2,040 to £3,770 per m² including VAT. A 25 m² standard-spec wraparound typically lands around £58,500 to £74,000 in Frome before design and council fees.
Book a free site visit in Frome
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.