Romford house extensions
We design and build house extensions for homes in Romford and the surrounding Greater London area, with guide prices adjusted for the region.
- Postcode districtsRM1, RM2, RM5, RM7, RM11, RM12
- Price regionLondon (×1.3)
- Planning rulesEngland
- Site visitFree, no obligation

Areas we cover around Romford
Site visits are available across Romford (RM1, RM2, RM5, RM7, RM11, RM12). Neighbouring towns we cover include Hornchurch (2 miles), Dagenham (2 miles), Becontree (3 miles), Ilford (5 miles), Barking (5 miles). Brentwood, in Essex, is roughly 6 miles from Romford and also on our list.
Approvals for an extension in Romford
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).
Guide prices for Romford
Use these Romford 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 | £58,000 – £73,000 |
| Wraparound extensions | 25 m² | £74,500 – £94,500 |
| Kitchen extensions | 20 m² | £54,500 – £69,000 |
| Side return extensions | 11 m² | £34,000 – £43,000 |
| Extensions over a garage | 12 m² | £32,500 – £42,500 |
| Single-storey rear extensions | 20 m² | £53,000 – £68,000 |
| Double-storey extensions | 32 m² | £74,500 – £98,000 |
Which extension suits a Romford home?
In London, space is at a premium and gardens are often short, so side returns, wraparounds and carefully planned rear extensions tend to make the most of every metre.
The types we would usually look at first for a home in Romford are side return extensions, kitchen extensions and wraparound extensions, depending on the garden and how the house is laid out.
All extension types we build in Romford
- Single-storey rear extensions · from £27,000
- Extension plans and drawings · from £1,550
- Planning permission for extensions · from £450
- Flat roof extensions · from £27,000
- Double-storey extensions · from £49,000
- Bungalow extensions · from £34,000
- Building regulations for extensions · from £1,150
- Pitched roof extensions · from £28,500
- Side extensions · from £28,500
- Porch extensions · from £5,200
- Extensions over a garage · from £31,000
- Bedroom extensions · from £33,500
- Timber frame extensions · from £27,000
- Annexe extensions · from £71,500
- Wraparound extensions · from £46,500
- Orangery extensions · from £39,000
- Side return extensions · from £23,000
- Kitchen extensions · from £35,000
- Glass box extensions · from £39,000
- Conservatory replacement extensions · from £26,000
- Home office extensions · from £20,500
- Utility and boot room extensions · from £18,000
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
With the design and specification agreed, you get a fixed written price and a start date.
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 Romford
How much does an extension cost in Romford?
Using our London factor (×1.3), a standard-spec single-storey extension of 20 m² is a guide £53,000 to £68,000 including VAT, and a 32 m² two-storey extension £74,500 to £98,000. Your written price follows the survey.
Do you cover all of Romford?
Yes, including the surrounding parts of Greater London. Site visits are free and there is no obligation.
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.
Book a free site visit in Romford
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.