Bungalow extensions in Swanage: design, approvals and build
Swanage homeowners can use us for the whole bungalow extension project: survey, design, planning or permitted development checks, building regulations and the build itself.
- Guide price in SwanageFrom £26,500 inc VAT
- PlanningSingle storey often permitted development
- Build time10–18 weeks on site
- Postcode districtsBH19
Extensions in and around Swanage
Across BH19, we can visit, measure and advise. Neighbouring towns we cover include Poole (7 miles), Bournemouth (9 miles), Christchurch (12 miles), Ferndown (14 miles).
For homes towards Hampshire, New Milton is around 17 miles away. In the South West, local stone, render and brick vary from town to town, so matching materials is a big part of designing an extension that looks right.
Guide prices for Swanage
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 Swanage: £1,780 to £3,470 per m² including VAT, depending on specification.
| Size | Essential | Standard | Premium |
|---|---|---|---|
| 3 m × 5 m 15 m² | £26,500 – £32,500 | £31,000 – £41,000 | £39,500 – £52,500 |
| 4 m × 6 m 24 m² | £42,500 – £51,500 | £50,000 – £65,000 | £63,500 – £83,500 |
| L-shape 35 m² | £62,000 – £75,000 | £73,000 – £95,000 | £92,500 – £121,500 |
For a figure based on your own dimensions, use our guide-price tool.
What we take care of
- Structural survey before any upward extension
- Level thresholds and accessible layouts
- Single-storey extension options assessed first
- Planning application where needed
- Roof designs that tie into the existing hipped or gable roof
Bungalow roofs are often hipped, which makes tying in an extension roof a careful job. We draw the roof junction early because it drives both the look and the cost.
Planning rules that apply in Swanage
In England a single-storey extension to a bungalow follows the normal permitted development limits (3 m or 4 m, or 6 m and 8 m through prior approval). Adding a first floor always needs planning permission.
Before any drawing is finalised we check whether the house is listed, in a conservation area or subject to an Article 4 direction.
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
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
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
You receive a written, itemised price and programme. Nothing starts until you are happy with it.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Bungalow extension questions answered
Will my neighbours in Swanage be involved?
If a planning application or prior approval is needed, the council notifies neighbours. If the work is on or near a shared boundary, party wall notices may also be needed.
Do you cover all of Swanage?
Yes. We cover Swanage and the surrounding parts of Dorset. Site visits are free and there is no obligation.
Who do I contract with for a bungalow extension in Swanage?
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 much does a bungalow extension cost?
Our guide range for single-storey work is about £1,780 to £3,470 per m² including VAT. Going upwards is priced after a structural survey.
Is it better to extend sideways or upwards?
Sideways and rearwards is usually simpler, cheaper and keeps single-level living. Upwards saves garden but means stairs, more structure and planning permission.
Book a free site visit in Swanage
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.