Extending your home in Billericay
Looking to extend your home in Billericay? Start here: extension types, guide prices for Billericay, the planning rules that apply and how a project runs.
- Postcode districtsCM11, CM12
- Price regionEast of England (×1.06)
- Planning rulesEngland
- Site visitFree, no obligation
Approvals for an extension in Billericay
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).
Billericay and surrounding towns
Our survey diary covers Billericay, including CM11, CM12. Nearby, we also take on projects in Basildon (4 miles), Wickford (5 miles), Brentwood (5 miles), Stanford-le-Hope (7 miles), Chelmsford (8 miles). Hornchurch, in Greater London, is roughly 10 miles from Billericay and also on our list.
What extensions cost in Billericay
Use these Billericay 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) |
|---|---|---|
| Wraparound extensions | 25 m² | £60,500 – £77,000 |
| Kitchen extensions | 20 m² | £44,500 – £56,500 |
| Single-storey rear extensions | 20 m² | £43,000 – £55,500 |
| Orangery extensions | 16 m² | £47,000 – £59,500 |
| Extensions over a garage | 12 m² | £26,500 – £34,500 |
| Conservatory replacement extensions | 14 m² | £31,500 – £41,000 |
| Side return extensions | 11 m² | £27,500 – £35,000 |
Which extension suits a Billericay home?
Across the East of England many houses sit on generous plots, and single-storey and wraparound extensions are a natural fit.
For many houses here, double-storey extensions, single-storey rear extensions or bungalow extensions gives the most useful space for the budget.
All extension types we build in Billericay
- Flat roof extensions · from £22,000
- Orangery extensions · from £31,500
- Utility and boot room extensions · from £14,500
- Kitchen extensions · from £28,500
- Building regulations for extensions · from £950
- Wraparound extensions · from £38,000
- Porch extensions · from £4,200
- Double-storey extensions · from £40,000
- Pitched roof extensions · from £23,500
- Home office extensions · from £16,500
- Side return extensions · from £19,000
- Bungalow extensions · from £27,500
- Glass box extensions · from £31,500
- Annexe extensions · from £58,000
- Extensions over a garage · from £25,000
- Bedroom extensions · from £27,500
- Conservatory replacement extensions · from £21,000
- Side extensions · from £23,000
- Planning permission for extensions · from £350
- Timber frame extensions · from £22,000
- Single-storey rear extensions · from £22,000
- Extension plans and drawings · from £1,250
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
Design and approvals
We produce the drawings and structural design, and manage the approvals so they are in place before work starts.
Fixed written price
You receive a written, itemised price and programme. Nothing starts until you are happy with it.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Questions about extensions in Billericay
How much does an extension cost in Billericay?
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 cover all of Billericay?
Yes, including the surrounding parts of Essex. Site visits are free and there is no obligation.
Do I need planning permission for an extension in Billericay?
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.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Billericay, and the guide-price tool gives a range for your own size and finish in about a minute.
Book a free site visit in Billericay
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.