Home extensions in Witham
Every type of house extension in Witham, from single-storey kitchen extensions to two-storey additions, side returns and orangeries. We design, handle the approvals and build.
- Postcode districtsCM8
- Price regionEast of England (×1.06)
- Planning rulesEngland
- Site visitFree, no obligation
Planning and building control in Witham
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 extension can be permitted development if it is no more than 4 m high and no wider than half the width of the original house. Two-storey side extensions, and any side extension on designated land such as a conservation area, need a householder planning application.
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).
What extensions cost in Witham
Use these Witham guide prices to sense-check a budget; the guide-price tool narrows them to your own size, and the site visit turns them into a written figure.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| 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 |
| Wraparound extensions | 25 m² | £60,500 – £77,000 |
| Conservatory replacement extensions | 14 m² | £31,500 – £41,000 |
| Kitchen extensions | 20 m² | £44,500 – £56,500 |
| Extensions over a garage | 12 m² | £26,500 – £34,500 |
Where we work near Witham
Our survey diary covers Witham, including CM8. Nearby, we also take on projects in Maldon (5 miles), Braintree (7 miles), Chelmsford (9 miles), Colchester (13 miles), Wickford (14 miles). For homes towards Suffolk, Sudbury is around 17 miles away.
What works best for Witham houses?
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.
The types we would usually look at first for a home in Witham are double-storey extensions, single-storey rear extensions and wraparound extensions, depending on the garden and how the house is laid out.
Extension types and starting prices
- Single-storey rear extensions · from £22,000
- Utility and boot room extensions · from £14,500
- Kitchen extensions · from £28,500
- Conservatory replacement extensions · from £21,000
- Flat roof extensions · from £22,000
- Side return extensions · from £19,000
- Planning permission for extensions · from £350
- Bungalow extensions · from £27,500
- Porch extensions · from £4,200
- Pitched roof extensions · from £23,500
- Extension plans and drawings · from £1,250
- Glass box extensions · from £31,500
- Orangery extensions · from £31,500
- Building regulations for extensions · from £950
- Double-storey extensions · from £40,000
- Annexe extensions · from £58,000
- Side extensions · from £23,000
- Wraparound extensions · from £38,000
- Bedroom extensions · from £27,500
- Timber frame extensions · from £22,000
- Extensions over a garage · from £25,000
- Home office extensions · from £16,500
Free site visit
It starts with a visit to your house to measure, check access and talk through ideas and budget.
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
We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Questions about extensions in Witham
How much does an extension cost in Witham?
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 I need planning permission for an extension in Witham?
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 Witham?
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.
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 Witham
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.