Swanage, Dorset
Bungalow rear extension in Swanage
Thinking about a bungalow rear extension in Swanage? Single-storey rear extensions that keep everything on one level. Our team handles the drawings, the planning route and the build, and your contract is with one company throughout.
Swanage sits in Dorset, with postcode districts including BH19. For Swanage bungalows we design the roof first, because the low eaves decide the height of the new room.
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 bungalow rear extension cost in Swanage?
For Swanage we work from the South West England rate: £1,920–£3,120 per square metre of new floor, including VAT, 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) | £23,000–£37,500 |
| 4 m wide × 6 m deep (24 m²) | £46,000–£75,000 |
Ground conditions, glazing, the roof and how far the house is opened up move the final figure within the range.
Do you need planning permission for a bungalow rear extension in Swanage?
Whether your bungalow rear extension in Swanage needs a planning application depends on its size, your house and any local restrictions.
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.
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. At the first visit we measure what is there now and tell you which route fits: permitted development, prior approval or a planning application.
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 bungalow 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.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Paperwork handled
Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
Build and sign-off
We build to the approved drawings with regular updates, then hand over the building control completion certificate and any guarantees from suppliers.
Bungalow rear extensions near Swanage
Close by, we work in Poole, about 7.4 miles away, and Bournemouth, about 8.5 miles away.
- Bungalow rear extension in Poole
- Bungalow rear extension in Bournemouth
- Bungalow rear extension in Canford Heath
- Bungalow rear extension in Broadstone
- Bungalow rear extension in Christchurch
Other work in Swanage:
FAQ
Bungalow rear extension questions in Swanage
What postcode areas do you cover around Swanage?
Including BH19, and the surrounding Dorset area.
Is the site visit in Swanage free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Can a bungalow extension be fully accessible?
Yes: level thresholds, wider doors and a wet room are straightforward to design in.
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.
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.
How long does a rear extension take to build in Swanage?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.