Extensions in Bushey: design, planning and build
Looking to extend your home in Bushey? Start here: extension types, guide prices for Bushey, the planning rules that apply and how a project runs.
- Postcode districtsWD1, WD2, WD17, WD18, WD19, WD23
- Price regionEast of England (×1.06)
- Planning rulesEngland
- Site visitFree, no obligation
Guide prices for Bushey
Use these Bushey guide prices to sense-check a budget; the guide-price tool narrows them to your own size, and the site visit turns them into a written figure.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Single-storey rear extensions | 20 m² | £43,000 – £55,500 |
| Side return extensions | 11 m² | £27,500 – £35,000 |
| Conservatory replacement extensions | 14 m² | £31,500 – £41,000 |
| Orangery extensions | 16 m² | £47,000 – £59,500 |
| Extensions over a garage | 12 m² | £26,500 – £34,500 |
| Wraparound extensions | 25 m² | £60,500 – £77,000 |
Do extensions in Bushey need planning permission?
In England a single-storey rear extension can usually go up to 3 m beyond the original rear wall of a semi-detached or terraced house, or 4 m on a detached house, without a planning application, provided it is no more than 4 m high, keeps eaves to 3 m within 2 m of a boundary and, with other buildings, covers no more than half the land around the original house. The larger home extension prior approval scheme raises those depths to 6 m and 8 m, with neighbours notified and a 42-day decision.
In England a single-storey side extension can be permitted development if it is no more than 4 m high and no wider than half the width of the original house. Two-storey side extensions, and any side extension on designated land such as a conservation area, need a householder planning application.
In a conservation area, national park, National Landscape, the Broads or a World Heritage Site the permitted development limits are tighter (no side or two-storey extensions without an application). Listed homes need listed building consent, and if permitted development rights have been removed, any extension needs an application.
If the work involves a shared wall, building on the boundary, or digging foundations within 3 m (sometimes 6 m) of a neighbour's building, the Party Wall etc. Act 1996 applies and notice must be served before work starts: two months for work to a party wall, one month for new walls on the boundary and for excavations.
Applications are decided by the local planning authority (your district, borough or unitary council).
What works best for Bushey houses?
The East of England mixes market-town terraces, inter-war semis and modern estates. Clay soils are common in parts of the region, which can affect foundation design.
Start by comparing wraparound extensions, double-storey extensions and bungalow extensions: between them they cover most of the layouts we see requested for houses like these.
Covering Bushey and nearby
Our survey diary covers Bushey, including WD1, WD2, WD17, WD18, WD19, WD23. Neighbouring towns we cover include Watford (2 miles), Borehamwood (4 miles), Rickmansworth (5 miles), St Albans (7 miles), Hemel Hempstead (9 miles). For homes towards Greater London, Wealdstone is around 3 miles away.
Extension types and starting prices
- Extensions over a garage · from £25,000
- Home office extensions · from £16,500
- Building regulations for extensions · from £950
- Bungalow extensions · from £27,500
- Flat roof extensions · from £22,000
- Porch extensions · from £4,200
- Side return extensions · from £19,000
- Kitchen extensions · from £28,500
- Glass box extensions · from £31,500
- Conservatory replacement extensions · from £21,000
- Annexe extensions · from £58,000
- Wraparound extensions · from £38,000
- Bedroom extensions · from £27,500
- Side extensions · from £23,000
- Timber frame extensions · from £22,000
- Pitched roof extensions · from £23,500
- Utility and boot room extensions · from £14,500
- Single-storey rear extensions · from £22,000
- Double-storey extensions · from £40,000
- Planning permission for extensions · from £350
- Orangery extensions · from £31,500
- Extension plans and drawings · from £1,250
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
Design and approvals
Once the layout is agreed, we deal with the council: planning permission or written confirmation that none is needed, plus building control.
Fixed written price
You receive a written, itemised price and programme. Nothing starts until you are happy with it.
Build and sign-off
The build is managed from start to finish, inspected at each stage and signed off on completion.
Questions about extensions in Bushey
How much does an extension cost in Bushey?
Using our East of England factor (×1.06), a standard-spec single-storey extension of 20 m² is a guide £43,000 to £55,500 including VAT, and a 32 m² two-storey extension £61,000 to £80,000. Your written price follows the survey.
Will my neighbours need to be told?
If you apply for planning or prior approval the council notifies them, and in England party wall notices may be needed for work near a shared boundary.
Do you cover all of Bushey?
Yes, including the surrounding parts of Hertfordshire. Site visits are free and there is no obligation.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Bushey, and the guide-price tool gives a range for your own size and finish in about a minute.
Who do I contract with?
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.
Book a free site visit in Bushey
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.