Extending your home in Ruislip
Looking to extend your home in Ruislip? Start here: extension types, guide prices for Ruislip, the planning rules that apply and how a project runs.
- Postcode districtsHA4, HA5, UB10
- Price regionLondon (×1.3)
- Planning rulesEngland
- Site visitFree, no obligation
Which extension suits a Ruislip home?
London's housing is dominated by Victorian and Edwardian terraces, many with a rear outrigger and a side return, and 1930s semis in the outer boroughs. Conservation areas are common, so the planning check comes first.
Start by comparing wraparound extensions, kitchen extensions and glass box extensions: between them they cover most of the layouts we see requested for houses like these.
Where we work near Ruislip
Postcode districts we cover around Ruislip include HA4, HA5, UB10. Neighbouring towns we cover include South Ruislip (1 mile), Pinner (2 miles), Northolt (3 miles), Uxbridge (3 miles), Harrow (4 miles). For homes towards Hertfordshire, Rickmansworth is around 5 miles away.
Ruislip extension prices at a glance
Every figure below is a guide for Ruislip, adjusted for London build costs (×1.3) and including VAT. Design and council fees are shown separately on each page.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Kitchen extensions | 20 m² | £54,500 – £69,000 |
| Double-storey extensions | 32 m² | £74,500 – £98,000 |
| Conservatory replacement extensions | 14 m² | £39,000 – £50,500 |
| Wraparound extensions | 25 m² | £74,500 – £94,500 |
| Side return extensions | 11 m² | £34,000 – £43,000 |
| Orangery extensions | 16 m² | £58,000 – £73,000 |
Planning and building control in Ruislip
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 return infill is often permitted development if it stays within the height limits and is no wider than half the width of the original house. Conservation areas, listed buildings and flats always need an application, and the boundary wall usually brings in the Party Wall Act.
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.
Building regulations approval is separate from planning. In England you can use the council's building control team or a registered building control approver; a full plans application gets the drawings checked before work starts, and the inspector signs the work off with a completion certificate.
Applications are decided by the local planning authority (your district, borough or unitary council).
Every extension type in Ruislip
- Extension plans and drawings · from £1,550
- Side return extensions · from £23,000
- Side extensions · from £28,500
- Annexe extensions · from £71,500
- Building regulations for extensions · from £1,150
- Porch extensions · from £5,200
- Extensions over a garage · from £31,000
- Glass box extensions · from £39,000
- Pitched roof extensions · from £28,500
- Single-storey rear extensions · from £27,000
- Timber frame extensions · from £27,000
- Kitchen extensions · from £35,000
- Flat roof extensions · from £27,000
- Bungalow extensions · from £34,000
- Wraparound extensions · from £46,500
- Home office extensions · from £20,500
- Double-storey extensions · from £49,000
- Planning permission for extensions · from £450
- Orangery extensions · from £39,000
- Bedroom extensions · from £33,500
- Utility and boot room extensions · from £18,000
- Conservatory replacement extensions · from £26,000
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
Design and approvals
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
Fixed written price
We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Questions about extensions in Ruislip
How much does an extension cost in Ruislip?
Using our London factor (×1.3), a standard-spec single-storey extension of 20 m² is a guide £53,000 to £68,000 including VAT, and a 32 m² two-storey extension £74,500 to £98,000. Your written price follows the survey.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Ruislip, and the guide-price tool gives a range for your own size and finish in about a minute.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Do you cover all of Ruislip?
Yes, including the surrounding parts of Greater London. Site visits are free and there is no obligation.
Book a free site visit in Ruislip
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.