Warminster, Wiltshire
Kitchen-diner rear extension in Warminster
Kitchen-diner rear extension in Warminster: an open-plan kitchen, dining and family room that opens straight onto the garden. We measure the house, show you what the rules allow, price it in writing and build it.
We cover Warminster (BA12 and BA13) as part of our Wiltshire work. We usually keep the working kitchen where the old one was and put the dining table in the new space by the doors, which suits most Warminster homes.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a kitchen-diner rear extension cost in Warminster?
In Warminster, our guide for a kitchen-diner rear extension is £1,980–£3,220 per square metre including VAT for a standard specification. South West prices run slightly above our West Midlands baseline; natural stone to match the house is the main variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £23,500–£38,500 |
| 4 m wide × 5 m deep (20 m²) | £39,500–£64,500 |
| 4 m wide × 6 m deep (24 m²) | £47,500–£77,500 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a kitchen-diner rear extension in Warminster?
Here is how the rules in England apply to a kitchen-diner rear extension in Warminster.
In England a single-storey rear extension can often be built under permitted development: up to 3 metres beyond the original rear wall of an attached house, or 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres if any part is within 2 metres of a boundary.
If 3 or 4 metres is not enough, England's prior approval route allows 6 metres on a terraced or semi-detached house and 8 metres on a detached house for a single-storey rear extension. Neighbours are consulted, the council decides within 42 days, and the fee is £249, rising to £310 from 8 December 2026.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. We check your house's planning history and any conservation area before drawing, so the route is clear before you spend on plans.
What are homes in Warminster like to extend?
Warminster has Victorian terraces nearer the centre and post-war semis on the edges. Sloping gardens are frequent, which affects floor levels and steps down to the patio.
How a kitchen-diner rear extension in Warminster comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Kitchen-diner rear extensions near Warminster
We also build kitchen-diner rear extensions in nearby Westbury (3.9 miles) and Frome (6.4 miles).
- Kitchen-diner rear extension in Westbury
- Kitchen-diner rear extension in Frome
- Kitchen-diner rear extension in Trowbridge
- Kitchen-diner rear extension in Melksham
- Kitchen-diner rear extension in Devizes
Other work in Warminster:
FAQ
Kitchen-diner rear extension questions in Warminster
How long does a rear extension take to build in Warminster?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Can you match the brick or stone on my Warminster house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Can I add a utility room?
Often. A narrow utility or boot room along one side keeps the washing machine out of the open-plan space.
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.
Do you handle building control in Warminster?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
What postcode areas do you cover around Warminster?
Including BA12 and BA13, and the surrounding Wiltshire area.