House extensions in South Ockendon
From a small utility to a two-storey addition, we take on house extensions throughout South Ockendon, starting with a free visit and a planning check.
- Postcode districtsRM15, RM20
- Price regionEast of England (×1.06)
- Planning rulesEngland
- Site visitFree, no obligation
Popular extension prices in South Ockendon
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) |
|---|---|---|
| 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 |
| Kitchen extensions | 20 m² | £44,500 – £56,500 |
South Ockendon and surrounding towns
Our survey diary covers South Ockendon, including RM15, RM20. We also work in nearby Grays (3 miles), Stanford-le-Hope (7 miles), Brentwood (8 miles), Basildon (9 miles), Billericay (10 miles). Just over the Greater London border, Hornchurch is about 4 miles away.
Which extension suits a South Ockendon home?
Across the East of England many houses sit on generous plots, and single-storey and wraparound extensions are a natural fit.
The types we would usually look at first for a home in South Ockendon are double-storey extensions, bungalow extensions and single-storey rear extensions, depending on the garden and how the house is laid out.
Planning and building control in South Ockendon
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.
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).
Extension types and starting prices
- Building regulations for extensions · from £950
- Bungalow extensions · from £27,500
- Side return extensions · from £19,000
- Timber frame extensions · from £22,000
- Kitchen extensions · from £28,500
- Glass box extensions · from £31,500
- Single-storey rear extensions · from £22,000
- Planning permission for extensions · from £350
- Orangery extensions · from £31,500
- Side extensions · from £23,000
- Porch extensions · from £4,200
- Pitched roof extensions · from £23,500
- Annexe extensions · from £58,000
- Extensions over a garage · from £25,000
- Extension plans and drawings · from £1,250
- Bedroom extensions · from £27,500
- Double-storey extensions · from £40,000
- Flat roof extensions · from £22,000
- Conservatory replacement extensions · from £21,000
- Utility and boot room extensions · from £14,500
- Home office extensions · from £16,500
- Wraparound extensions · from £38,000
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
Design and approvals
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
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
The build is managed from start to finish, inspected at each stage and signed off on completion.
Questions about extensions in South Ockendon
How much does an extension cost in South Ockendon?
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.
Do you cover all of South Ockendon?
Yes, including the surrounding parts of Essex. Site visits are free and there is no obligation.
How long does an extension take in South Ockendon?
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 I need planning permission for an extension in South Ockendon?
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.
Book a free site visit in South Ockendon
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.