Swanage, Dorset
Kitchen-diner rear extension in Swanage
We plan and build kitchen-diner rear extensions for homeowners in Swanage. An open-plan kitchen, dining and family room that opens straight onto the garden. Start with a free site visit, then a written price once the design is agreed.
We cover Swanage (BH19) as part of our Dorset 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 Swanage 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 Swanage?
Guide prices for a kitchen-diner rear extension in Swanage start from our South West England rate of £1,980–£3,220 per square metre, including VAT. 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 Swanage?
The planning route for a kitchen-diner rear extension in Swanage is set by England's householder rules and your council.
English permitted development (Class A) allows a single-storey rear extension of 3 metres on a terraced or semi-detached house and 4 metres on a detached one, measured from the original house, with a maximum height of 4 metres and eaves of no more than 3 metres within 2 metres of a boundary.
England also has the larger home extension route: a single-storey rear extension of up to 6 metres on an attached house or 8 metres on a detached house, after prior approval from the council. The council notifies your neighbours and has 42 days to decide; the fee is £249 (£310 for applications made from 8 December 2026). The route is not available on designated land such as conservation areas.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.
What are homes in Swanage like to extend?
Swanage 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 Swanage comes together
Free site visit
We measure the house and garden, look at the back wall, drainage and boundaries, and talk through what you want from the space.
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.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Kitchen-diner rear extensions near Swanage
Close by, we work in Poole, about 7.4 miles away, and Bournemouth, about 8.5 miles away.
- Kitchen-diner rear extension in Poole
- Kitchen-diner rear extension in Bournemouth
- Kitchen-diner rear extension in Canford Heath
- Kitchen-diner rear extension in Broadstone
- Kitchen-diner rear extension in Christchurch
Other work in Swanage:
FAQ
Kitchen-diner rear extension questions in Swanage
How much does a kitchen-diner rear extension cost in Swanage?
As a guide, £1,980–£3,220 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £23,500–£38,500 at that rate. Your written price follows the survey.
Can you match the brick or stone on my Swanage house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Can I have underfloor heating?
Yes. Wet underfloor heating in the new screed is the usual choice, often with the old room's radiators kept or replaced.
What postcode areas do you cover around Swanage?
Including BH19, and the surrounding Dorset area.
Do I need planning permission for a rear extension in Swanage?
Often not for a single-storey rear extension of up to 3 metres (4 metres on a detached house) under permitted development, or up to 6 or 8 metres with prior approval, unless the house is in a conservation area or its rights have been removed.
Do you handle building control in Swanage?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.