Extensions in Barking: design, planning and build
We design and build house extensions for homes in Barking and the surrounding Greater London area, with guide prices adjusted for the region.
- Postcode districtsE6, E12, E20, IG1, IG3, IG11
- Price regionLondon (×1.3)
- Planning rulesEngland
- Site visitFree, no obligation
Popular extension prices in Barking
We publish guide prices so you can budget before anyone visits. For Barking they are adjusted by ×1.3, the factor we use across London.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Extensions over a garage | 12 m² | £32,500 – £42,500 |
| Double-storey extensions | 32 m² | £74,500 – £98,000 |
| Wraparound extensions | 25 m² | £74,500 – £94,500 |
| Conservatory replacement extensions | 14 m² | £39,000 – £50,500 |
| Kitchen extensions | 20 m² | £54,500 – £69,000 |
| Side return extensions | 11 m² | £34,000 – £43,000 |
| Orangery extensions | 16 m² | £58,000 – £73,000 |
Which extension suits a Barking 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 Barking are side return extensions, glass box extensions and wraparound extensions, depending on the garden and how the house is laid out.
Planning rules in Barking
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.
If the work involves a shared wall, building on the boundary, or digging foundations within 3 m (sometimes 6 m) of a neighbour's building, the Party Wall etc. Act 1996 applies and notice must be served before work starts: two months for work to a party wall, one month for new walls on the boundary and for excavations.
Applications are decided by the local planning authority (your district, borough or unitary council).
Areas we cover around Barking
Across E6, E12, E20, IG1, IG3, IG11, we can visit, measure and advise. We also work in nearby Ilford (2 miles), Manor Park (2 miles), Becontree (2 miles), Thamesmead (3 miles), West Ham (3 miles). Dartford, in Kent, is roughly 8 miles from Barking and also on our list.
Extension types and starting prices
- Extensions over a garage · from £31,000
- Extension plans and drawings · from £1,550
- Wraparound extensions · from £46,500
- Glass box extensions · from £39,000
- Building regulations for extensions · from £1,150
- Bungalow extensions · from £34,000
- Pitched roof extensions · from £28,500
- Double-storey extensions · from £49,000
- Flat roof extensions · from £27,000
- Kitchen extensions · from £35,000
- Orangery extensions · from £39,000
- Annexe extensions · from £71,500
- Home office extensions · from £20,500
- Timber frame extensions · from £27,000
- Bedroom extensions · from £33,500
- Utility and boot room extensions · from £18,000
- Side extensions · from £28,500
- Side return extensions · from £23,000
- Porch extensions · from £5,200
- Single-storey rear extensions · from £27,000
- Planning permission for extensions · from £450
- Conservatory replacement extensions · from £26,000
Free site visit
It starts with a visit to your house to measure, check access and talk through ideas and budget.
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
The build is managed from start to finish, inspected at each stage and signed off on completion.
Questions about extensions in Barking
How much does an extension cost in Barking?
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.
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.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
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 Barking
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.