Hythe house extensions
From a small utility to a two-storey addition, we take on house extensions throughout Hythe, starting with a free visit and a planning check.
- Postcode districtsSO45
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
Do extensions in Hythe 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 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.
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).
Popular extension prices in Hythe
Every figure below is a guide for Hythe, 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) |
|---|---|---|
| Single-storey rear extensions | 20 m² | £45,500 – £58,500 |
| Orangery extensions | 16 m² | £50,000 – £63,000 |
| Extensions over a garage | 12 m² | £28,000 – £36,500 |
| Kitchen extensions | 20 m² | £47,000 – £59,500 |
| Wraparound extensions | 25 m² | £64,000 – £81,500 |
What works best for Hythe houses?
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.
Start by comparing wraparound extensions, double-storey extensions and orangery extensions: between them they cover most of the layouts we see requested for houses like these.
Where we work near Hythe
Across SO45, we can visit, measure and advise. Nearby, we also take on projects in Southampton (3 miles), Totton (6 miles), Eastleigh (8 miles), Fareham (10 miles), Gosport (13 miles). Just over the Isle of Wight border, Cowes is about 8 miles away.
Choose an extension type
- Home office extensions · from £17,500
- Orangery extensions · from £33,500
- Annexe extensions · from £61,500
- Side extensions · from £24,500
- Side return extensions · from £20,000
- Extensions over a garage · from £26,500
- Utility and boot room extensions · from £15,500
- Flat roof extensions · from £23,500
- Porch extensions · from £4,450
- Wraparound extensions · from £40,000
- Glass box extensions · from £33,500
- Planning permission for extensions · from £350
- Bungalow extensions · from £29,000
- Building regulations for extensions · from £1,000
- Conservatory replacement extensions · from £22,000
- Extension plans and drawings · from £1,300
- Timber frame extensions · from £23,500
- Bedroom extensions · from £29,000
- Double-storey extensions · from £42,500
- Single-storey rear extensions · from £23,500
- Pitched roof extensions · from £24,500
- Kitchen extensions · from £30,000
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
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
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 Hythe
How much does an extension cost in Hythe?
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.
Do you cover all of Hythe?
Yes, including the surrounding parts of Hampshire. 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 Hythe, 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 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 Hythe
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.