Maidenhead house extensions
Every type of house extension in Maidenhead, from single-storey kitchen extensions to two-storey additions, side returns and orangeries. We design, handle the approvals and build.
- Postcode districtsSL6
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
Approvals for an extension in Maidenhead
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).
Which extension suits a Maidenhead home?
Homes across the South East range from Victorian terraces in the older town centres to large detached houses on the edges, so the right extension type varies street by street.
The types we would usually look at first for a home in Maidenhead are wraparound extensions, orangery extensions and double-storey extensions, depending on the garden and how the house is laid out.
Areas we cover around Maidenhead
Postcode districts we cover around Maidenhead include SL6. Nearby, we also take on projects in Slough (5 miles), Windsor (6 miles), Bracknell (8 miles), Wokingham (9 miles), Earley (11 miles). Marlow, in Buckinghamshire, is roughly 4 miles from Maidenhead and also on our list.
Popular extension prices in Maidenhead
Every figure below is a guide for Maidenhead, adjusted for South East England build costs (×1.12) and including VAT. Design and council fees are shown separately on each page.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Double-storey extensions | 32 m² | £64,500 – £84,500 |
| Single-storey rear extensions | 20 m² | £45,500 – £58,500 |
| Kitchen extensions | 20 m² | £47,000 – £59,500 |
| Extensions over a garage | 12 m² | £28,000 – £36,500 |
| Conservatory replacement extensions | 14 m² | £33,500 – £43,500 |
| Side return extensions | 11 m² | £29,500 – £37,000 |
All extension types we build in Maidenhead
- Side return extensions · from £20,000
- Orangery extensions · from £33,500
- Extensions over a garage · from £26,500
- Wraparound extensions · from £40,000
- Timber frame extensions · from £23,500
- Home office extensions · from £17,500
- Side extensions · from £24,500
- Pitched roof extensions · from £24,500
- Extension plans and drawings · from £1,300
- Glass box extensions · from £33,500
- Planning permission for extensions · from £350
- Bedroom extensions · from £29,000
- Double-storey extensions · from £42,500
- Single-storey rear extensions · from £23,500
- Annexe extensions · from £61,500
- Bungalow extensions · from £29,000
- Building regulations for extensions · from £1,000
- Utility and boot room extensions · from £15,500
- Conservatory replacement extensions · from £22,000
- Flat roof extensions · from £23,500
- Kitchen extensions · from £30,000
- Porch extensions · from £4,450
Free site visit
First, a site visit: we look at the house, garden, access and drains and listen to what you need.
Design and approvals
We produce the drawings and structural design, and manage the approvals so they are in place before work starts.
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
We build it with one project manager, book the building control inspections and hand over the completion certificate.
Questions about extensions in Maidenhead
How much does an extension cost in Maidenhead?
Using our South East England factor (×1.12), a standard-spec single-storey extension of 20 m² is a guide £45,500 to £58,500 including VAT, and a 32 m² two-storey extension £64,500 to £84,500. 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.
Do I need planning permission for an extension in Maidenhead?
Not always. It depends on the size, position and your property's history. Many single-storey rear extensions in England are permitted development or can use prior approval.
Do you cover all of Maidenhead?
Yes, including the surrounding parts of Berkshire. Site visits are free and there is no obligation.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Book a free site visit in Maidenhead
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.