Havant house extensions
More space without moving: we plan and build extensions across Havant, with one team for the drawings, the council and the build.
- Postcode districtsPO7, PO9
- Price regionSouth East England (×1.12)
- Planning rulesEngland
- Site visitFree, no obligation
What extensions cost in Havant
We publish guide prices so you can budget before anyone visits. For Havant they are adjusted by ×1.12, the factor we use across South East England.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Extensions over a garage | 12 m² | £28,000 – £36,500 |
| Kitchen extensions | 20 m² | £47,000 – £59,500 |
| Side return extensions | 11 m² | £29,500 – £37,000 |
| Conservatory replacement extensions | 14 m² | £33,500 – £43,500 |
| Orangery extensions | 16 m² | £50,000 – £63,000 |
| Single-storey rear extensions | 20 m² | £45,500 – £58,500 |
| Wraparound extensions | 25 m² | £64,000 – £81,500 |
Areas we cover around Havant
Across PO7, PO9, we can visit, measure and advise. Nearby, we also take on projects in Waterlooville (3 miles), Portsmouth (6 miles), Gosport (8 miles), Fareham (8 miles), Eastleigh (18 miles). Just over the West Sussex border, Emsworth is about 2 miles away.
Which extension suits a Havant home?
The South East has a broad mix of 1930s semis, post-war estates, newer developments and period cottages, and many houses have enough garden for a generous rear extension.
Depending on the plot, orangery extensions and wraparound extensions are often the strongest options, with single-storey rear extensions worth considering where there is room.
Approvals for an extension in Havant
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 two-storey rear extension is permitted development only if it projects no more than 3 m from the original rear wall, sits at least 7 m from the rear boundary, matches the roof pitch and uses obscure, non-opening side windows upstairs. Most two-storey extensions therefore go through a householder planning application, which costs £548 from 1 April 2026 and normally takes about 8 weeks.
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).
All extension types we build in Havant
- Side extensions · from £24,500
- Double-storey extensions · from £42,500
- Conservatory replacement extensions · from £22,000
- Building regulations for extensions · from £1,000
- Wraparound extensions · from £40,000
- Porch extensions · from £4,450
- Orangery extensions · from £33,500
- Extension plans and drawings · from £1,300
- Glass box extensions · from £33,500
- Planning permission for extensions · from £350
- Utility and boot room extensions · from £15,500
- Timber frame extensions · from £23,500
- Side return extensions · from £20,000
- Pitched roof extensions · from £24,500
- Bedroom extensions · from £29,000
- Bungalow extensions · from £29,000
- Annexe extensions · from £61,500
- Extensions over a garage · from £26,500
- Home office extensions · from £17,500
- Kitchen extensions · from £30,000
- Single-storey rear extensions · from £23,500
- Flat roof 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
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
Fixed written price
With the design and specification agreed, you get a fixed written price and a start date.
Build and sign-off
The build is managed from start to finish, inspected at each stage and signed off on completion.
Questions about extensions in Havant
How much does an extension cost in Havant?
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 Havant?
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.
How long does an extension take in Havant?
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.
Book a free site visit in Havant
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.