House extensions in West Molesey
Looking to extend your home in West Molesey? Start here: extension types, guide prices for West Molesey, the planning rules that apply and how a project runs.
- Postcode districtsKT8, KT12, TW16
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
Planning rules in West Molesey
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).
West Molesey extension prices at a glance
We publish guide prices so you can budget before anyone visits. For West Molesey they are adjusted by ×1.12, the factor we use across South East England.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Orangery extensions | 16 m² | £50,000 – £63,000 |
| Extensions over a garage | 12 m² | £28,000 – £36,500 |
| Side return extensions | 11 m² | £29,500 – £37,000 |
| Double-storey extensions | 32 m² | £64,500 – £84,500 |
| Kitchen extensions | 20 m² | £47,000 – £59,500 |
Which extension suits a West Molesey 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 West Molesey are orangery extensions, wraparound extensions and double-storey extensions, depending on the garden and how the house is laid out.
West Molesey and surrounding towns
Our survey diary covers West Molesey, including KT8, KT12, TW16. The same team covers East Molesey (1 mile), Sunbury-on-Thames (2 miles), Walton-on-Thames (2 miles), Esher (2 miles), Weybridge (4 miles), all within easy reach. Just over the Greater London border, Hampton is about 1 mile away.
Extension types and starting prices
- Annexe extensions · from £61,500
- Glass box extensions · from £33,500
- Side return extensions · from £20,000
- Conservatory replacement extensions · from £22,000
- Side extensions · from £24,500
- Porch extensions · from £4,450
- Extension plans and drawings · from £1,300
- Planning permission for extensions · from £350
- Extensions over a garage · from £26,500
- Bungalow extensions · from £29,000
- Timber frame extensions · from £23,500
- Orangery extensions · from £33,500
- Utility and boot room extensions · from £15,500
- Bedroom extensions · from £29,000
- Flat roof extensions · from £23,500
- Kitchen extensions · from £30,000
- Home office extensions · from £17,500
- Pitched roof extensions · from £24,500
- Double-storey extensions · from £42,500
- Building regulations for extensions · from £1,000
- Wraparound extensions · from £40,000
- Single-storey rear extensions · from £23,500
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
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
Fixed written price
With the design and specification agreed, you get a fixed written price and a start date.
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 West Molesey
How much does an extension cost in West Molesey?
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.
How long does an extension take in West Molesey?
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 West Molesey, and the guide-price tool gives a range for your own size and finish in about a minute.
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 I need planning permission for an extension in West Molesey?
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.
Book a free site visit in West Molesey
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.