Extending your home in South Ruislip
Looking to extend your home in South Ruislip? Start here: extension types, guide prices for South Ruislip, the planning rules that apply and how a project runs.
- Postcode districtsHA4, UB5
- Price regionLondon (×1.3)
- Planning rulesEngland
- Site visitFree, no obligation
What extensions cost in South Ruislip
Prices on this page use our London factor of ×1.3, include VAT at 20% and cover the build; your written price follows a survey and agreed drawings.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Side return extensions | 11 m² | £34,000 – £43,000 |
| Single-storey rear extensions | 20 m² | £53,000 – £68,000 |
| Kitchen extensions | 20 m² | £54,500 – £69,000 |
| Extensions over a garage | 12 m² | £32,500 – £42,500 |
| Conservatory replacement extensions | 14 m² | £39,000 – £50,500 |
Approvals for an extension in South 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).
What works best for South Ruislip houses?
In London, space is at a premium and gardens are often short, so side returns, wraparounds and carefully planned rear extensions tend to make the most of every metre.
Depending on the plot, kitchen extensions and wraparound extensions are often the strongest options, with glass box extensions worth considering where there is room.
South Ruislip and surrounding towns
Site visits are available across South Ruislip (HA4, UB5). Nearby, we also take on projects in Ruislip (1 mile), Northolt (2 miles), Hayes (Hillingdon) (3 miles), Pinner (3 miles), Greenford (3 miles). For homes towards Hertfordshire, Bushey is around 6 miles away.
Choose an extension type
- Utility and boot room extensions · from £18,000
- Side extensions · from £28,500
- Orangery extensions · from £39,000
- Building regulations for extensions · from £1,150
- Double-storey extensions · from £49,000
- Bedroom extensions · from £33,500
- Glass box extensions · from £39,000
- Side return extensions · from £23,000
- Wraparound extensions · from £46,500
- Porch extensions · from £5,200
- Pitched roof extensions · from £28,500
- Extension plans and drawings · from £1,550
- Bungalow extensions · from £34,000
- Annexe extensions · from £71,500
- Timber frame extensions · from £27,000
- Extensions over a garage · from £31,000
- Planning permission for extensions · from £450
- Home office extensions · from £20,500
- Flat roof extensions · from £27,000
- Conservatory replacement extensions · from £26,000
- Single-storey rear extensions · from £27,000
- Kitchen extensions · from £35,000
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
Work is carried out to the agreed programme, inspected by building control and signed off at the end.
Questions about extensions in South Ruislip
How much does an extension cost in South 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.
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.
How long does an extension take in South Ruislip?
Usually 2 to 4 months of design and approvals, then 10 to 16 weeks on site for a single-storey extension or 16 to 24 weeks for two storeys.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for South Ruislip, and the guide-price tool gives a range for your own size and finish in about a minute.
Book a free site visit in South 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.