Home extensions in Newmarket
We design and build house extensions for homes in Newmarket and the surrounding Suffolk area, with guide prices adjusted for the region.
- Postcode districtsIP28
- Price regionEast of England (×1.06)
- Planning rulesEngland
- Site visitFree, no obligation
Planning rules in Newmarket
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).
Choosing the right extension in Newmarket
The East of England mixes market-town terraces, inter-war semis and modern estates. Clay soils are common in parts of the region, which can affect foundation design.
For many houses here, double-storey extensions, wraparound extensions or bungalow extensions gives the most useful space for the budget.
Where we work near Newmarket
Site visits are available across Newmarket (IP28). Nearby, we also take on projects in Haverhill (11 miles), Bury St Edmunds (13 miles), Sudbury (20 miles), Stowmarket (25 miles), Ipswich (34 miles). Just over the Cambridgeshire border, Ely is about 12 miles away.
Guide prices for Newmarket
Prices on this page use our East of England factor of ×1.06, 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) |
|---|---|---|
| Conservatory replacement extensions | 14 m² | £31,500 – £41,000 |
| Wraparound extensions | 25 m² | £60,500 – £77,000 |
| Single-storey rear extensions | 20 m² | £43,000 – £55,500 |
| Orangery extensions | 16 m² | £47,000 – £59,500 |
| Double-storey extensions | 32 m² | £61,000 – £80,000 |
| Side return extensions | 11 m² | £27,500 – £35,000 |
| Kitchen extensions | 20 m² | £44,500 – £56,500 |
Every extension type in Newmarket
- Orangery extensions · from £31,500
- Conservatory replacement extensions · from £21,000
- Single-storey rear extensions · from £22,000
- Annexe extensions · from £58,000
- Side extensions · from £23,000
- Porch extensions · from £4,200
- Kitchen extensions · from £28,500
- Glass box extensions · from £31,500
- Building regulations for extensions · from £950
- Extensions over a garage · from £25,000
- Timber frame extensions · from £22,000
- Utility and boot room extensions · from £14,500
- Pitched roof extensions · from £23,500
- Double-storey extensions · from £40,000
- Bungalow extensions · from £27,500
- Bedroom extensions · from £27,500
- Flat roof extensions · from £22,000
- Planning permission for extensions · from £350
- Wraparound extensions · from £38,000
- Side return extensions · from £19,000
- Home office extensions · from £16,500
- Extension plans and drawings · from £1,250
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
The price is fixed in writing once the design is settled, with a clear programme and payment stages.
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 Newmarket
How much does an extension cost in Newmarket?
Using our East of England factor (×1.06), a standard-spec single-storey extension of 20 m² is a guide £43,000 to £55,500 including VAT, and a 32 m² two-storey extension £61,000 to £80,000. Your written price follows the survey.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
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.
How long does an extension take in Newmarket?
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.
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.
Book a free site visit in Newmarket
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.