Aylesbury, Buckinghamshire
Two-storey rear extension in Aylesbury
We plan and build two-storey rear extensions for homeowners in Aylesbury. 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.
Aylesbury sits in Buckinghamshire, with postcode districts including HP19, HP20 and HP21. In Aylesbury, 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 Aylesbury?
In Aylesbury, 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 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a two-storey rear extension in Aylesbury?
Planning for a two-storey rear extension in Aylesbury follows the English householder rules.
A two-storey rear extension can be permitted development in England only if it projects no more than 3 metres, stays at least 7 metres from the rear boundary, matches the existing roof pitch and has obscure-glazed upper side windows. In practice most double-storey rear extensions go through a householder planning application.
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 Aylesbury like to extend?
Commuter semis and detached houses make up much of Aylesbury, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a two-storey rear extension in Aylesbury comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
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 Aylesbury
From Aylesbury, the nearest places we also cover are Tring (6.8 miles) and Thame (8.4 miles).
- Two-storey rear extension in Tring
- Two-storey rear extension in Thame
- Two-storey rear extension in Leighton Buzzard
- Two-storey rear extension in Berkhamsted
- Two-storey rear extension in Chesham
Other work in Aylesbury:
FAQ
Two-storey rear extension questions in Aylesbury
What postcode areas do you cover around Aylesbury?
Including HP19, HP20 and HP21, and the surrounding Buckinghamshire area.
How much does a two-storey rear extension cost in Aylesbury?
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.
What is the 45-degree rule?
Many councils check that a two-storey extension does not cross a 45-degree line drawn from the nearest habitable window of the neighbouring house. We test it at the first drawing.
Can you match the brick or stone on my Aylesbury house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
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 I need a party wall agreement?
In England, usually yes if the extension is on or near a shared boundary or the foundations are close to a neighbour's building. We serve the notices.