House extensions in Dunstable
Every type of house extension in Dunstable, from single-storey kitchen extensions to two-storey additions, side returns and orangeries. We design, handle the approvals and build.
- Postcode districtsLU4, LU5, LU6
- Price regionEast of England (×1.06)
- Planning rulesEngland
- Site visitFree, no obligation
Covering Dunstable and nearby
We cover Dunstable and the postcode districts LU4, LU5, LU6. The same team covers Luton (5 miles), Leighton Buzzard (6 miles), Ampthill (10 miles), Kempston (16 miles), Bedford (17 miles), all within easy reach. For homes towards Hertfordshire, Harpenden is around 9 miles away.
Planning and building control in Dunstable
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).
Popular extension prices in Dunstable
We publish guide prices so you can budget before anyone visits. For Dunstable they are adjusted by ×1.06, the factor we use across East of England.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Wraparound extensions | 25 m² | £60,500 – £77,000 |
| Extensions over a garage | 12 m² | £26,500 – £34,500 |
| Double-storey extensions | 32 m² | £61,000 – £80,000 |
| Single-storey rear extensions | 20 m² | £43,000 – £55,500 |
| Orangery extensions | 16 m² | £47,000 – £59,500 |
| Side return extensions | 11 m² | £27,500 – £35,000 |
| Kitchen extensions | 20 m² | £44,500 – £56,500 |
Which extension suits a Dunstable home?
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.
Depending on the plot, single-storey rear extensions and double-storey extensions are often the strongest options, with bungalow extensions worth considering where there is room.
Every extension type in Dunstable
- Kitchen extensions · from £28,500
- Glass box extensions · from £31,500
- Extensions over a garage · from £25,000
- Home office extensions · from £16,500
- Side return extensions · from £19,000
- Timber frame extensions · from £22,000
- Conservatory replacement extensions · from £21,000
- Bungalow extensions · from £27,500
- Orangery extensions · from £31,500
- Pitched roof extensions · from £23,500
- Utility and boot room extensions · from £14,500
- Building regulations for extensions · from £950
- Flat roof extensions · from £22,000
- Double-storey extensions · from £40,000
- Planning permission for extensions · from £350
- Annexe extensions · from £58,000
- Side extensions · from £23,000
- Single-storey rear extensions · from £22,000
- Bedroom extensions · from £27,500
- Wraparound extensions · from £38,000
- Porch extensions · from £4,200
- 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
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
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
Work is carried out to the agreed programme, inspected by building control and signed off at the end.
Questions about extensions in Dunstable
How much does an extension cost in Dunstable?
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.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Dunstable, and the guide-price tool gives a range for your own size and finish in about a minute.
Do you cover all of Dunstable?
Yes, including the surrounding parts of Bedfordshire. Site visits are free and there is no obligation.
Do I need planning permission for an extension in Dunstable?
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.
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 Dunstable
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.