Beaconsfield, Buckinghamshire
Two-storey rear extension in Beaconsfield
We plan and build two-storey rear extensions for homeowners in Beaconsfield. A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. Start with a free site visit, then a written price once the design is agreed.
Beaconsfield is covered from our Buckinghamshire round, including HP9. In Beaconsfield, a two-storey rear extension is worth comparing with the cost of moving once stamp duty, agents' and legal fees are counted.
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 two-storey rear extension cost in Beaconsfield?
In Beaconsfield, our guide for a two-storey rear extension is £2,020–£3,020 per square metre including VAT for a standard specification. South East prices run above our West Midlands baseline, mainly on labour rates and clay-soil foundations.
| Size | Guide price inc VAT |
|---|---|
| 3 m × 5 m footprint, two floors (30 m²) | £60,500–£90,500 |
| 4 m × 6 m footprint, two floors (48 m²) | £97,000–£145,000 |
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 two-storey rear extension in Beaconsfield?
Whether your two-storey rear extension in Beaconsfield needs a planning application depends on its size, your house and any local restrictions.
England's rules allow a rear extension of more than one storey without an application only when it is no deeper than 3 metres and at least 7 metres from the boundary opposite the rear wall, and never on designated land. Most two-storey schemes need householder planning permission.
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 Beaconsfield like to extend?
Commuter semis and detached houses make up much of Beaconsfield, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a two-storey rear extension in Beaconsfield comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Paperwork handled
Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
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.
Two-storey rear extensions near Beaconsfield
Close by, we work in Chalfont St Peter, about 3.9 miles away, and Amersham, about 4.0 miles away.
- Two-storey rear extension in Chalfont St Peter
- Two-storey rear extension in Amersham
- Two-storey rear extension in Gerrards Cross
- Two-storey rear extension in High Wycombe
- Two-storey rear extension in Amersham on the Hill
Other work in Beaconsfield:
FAQ
Two-storey rear extension questions in Beaconsfield
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
Do you handle building control in Beaconsfield?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
Does a two-storey rear extension need planning permission?
Almost always. England and Northern Ireland allow 3 metres without an application only if at least 7 metres remains to the rear boundary; Wales and Scotland are similar or stricter.
How much does a two-storey rear extension cost in Beaconsfield?
As a guide, £2,020–£3,020 per square metre including VAT for a standard specification. For example, 3 m × 5 m footprint, two floors (30 m²): about £60,500–£90,500 at that rate. Your written price follows the survey.
How long does a rear extension take to build in Beaconsfield?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
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.