Dorchester kitchen extensions, designed and built
If you live in Dorchester and want more space without moving, a kitchen extension is one of the most practical ways to get it. We handle the drawings, approvals and the build.
- Guide price in DorchesterFrom £27,500 inc VAT
- PlanningOften permitted development (3–4 m), or prior approval up to 6–8 m
- Build time10–16 weeks on site
- Postcode districtsDT1
Covering Dorchester
Postcode districts we cover around Dorchester include DT1. The same team covers Weymouth (7 miles), Bridport (15 miles), Poole (20 miles), Wimborne Minster (22 miles), all within easy reach.
Yeovil, in Somerset, is roughly 18 miles from Dorchester and also on our list. 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.
What should I budget for a kitchen extension in Dorchester?
For Dorchester 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 Dorchester: £1,840 to £3,570 per m² including VAT, depending on specification.
| Size | Essential | Standard | Premium |
|---|---|---|---|
| 3 m × 5 m 15 m² | £27,500 – £32,500 | £32,000 – £41,000 | £40,500 – £54,000 |
| 4 m × 5 m 20 m² | £36,500 – £43,000 | £42,500 – £54,500 | £54,000 – £71,500 |
| 4 m × 7 m 28 m² | £51,000 – £60,000 | £59,500 – £76,000 | £75,500 – £100,000 |
Build cost only. A mid-range kitchen, supplied and fitted, typically adds £9,000 to £20,000.
Want a range for your exact size? The guide-price tool takes about a minute.
Who a kitchen extension suits
- Families who want cooking, dining and living together
- Small or closed-off kitchens
- Homes being prepared for sale or a long-term stay
Planning and approvals in Dorchester
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.
Homes in conservation areas, national parks, National Landscapes (formerly AONBs), the Broads and World Heritage Sites have tighter rules, so we always check the property's status and planning history before design starts.
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.
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).
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
We visit your Dorchester home, measure up, talk through what you want and check the planning position.
Design and approvals
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
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.
Questions people ask about kitchen extensions
Who do I contract with for a kitchen extension in Dorchester?
Your contract is with S&K Property Investments and Improvement Ltd, which designs and manages the project and the build teams who carry it out.
How long does a kitchen extension take to build in Dorchester?
On site, typically 10 to 16 weeks once approvals are in place. Before that, allow 4–12 weeks design and approvals.
Can I see a price before committing to anything?
Yes. The guide prices on this page are adjusted for Dorchester, and the guide-price tool gives a range for your own size. After the survey you get a written price before anything is agreed.
Can you fit a kitchen I buy elsewhere?
Yes. We can fit it or work with your supplier’s fitters. We need the layout early so that drains, services and lighting are in the right place.
How much does a kitchen extension cost?
For the extension itself our guide range is about £1,840 to £3,570 per m² including VAT. A standard 20 m² kitchen extension is typically around £42,500 to £54,500 in Dorchester, plus the kitchen itself, which commonly adds £9,000 to £20,000 for a mid-range design.
Book a free site visit in Dorchester
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.