Chafford Hundred, Essex
Rear extension planning drawings in Chafford Hundred
We plan and build rear extensions for homeowners in Chafford Hundred. Measured survey, design options, planning drawings and the application, handled for you. Start with a free site visit, then a written price once the design is agreed.
Chafford Hundred is covered from our Essex round, including RM15, RM17 and RM20. For Chafford Hundred homes we start with a measured survey, then draw options before anything is submitted.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
What do rear extension planning drawings cost in Chafford Hundred?
As a guide, £1,000–£2,500 including VAT for a single-storey rear extension, or £2,000–£3,500 for a two-storey scheme. A householder planning application in England costs £548 (£575 for applications made from 8 December 2026), and a lawful development certificate for proposed work costs half the householder fee. Ground conditions, glazing, the roof and how far the house is opened up move the final figure within the range.
Do you need planning permission for a rear extension in Chafford Hundred?
The planning route for a rear extension in Chafford Hundred is set by England's householder rules and your council.
England's rules allow a rear extension of more than one storey without an application only when it is no deeper than 3 metres and at least 7 metres from the boundary opposite the rear wall, and never on designated land. Most two-storey schemes need householder planning permission.
Councils aim to decide householder applications within 8 weeks of validation, and prior approval within 42 days.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. We check your house's planning history and any conservation area before drawing, so the route is clear before you spend on plans.
What are homes in Chafford Hundred like to extend?
Post-war semis and newer estates are typical of Chafford Hundred, and many have room for a full-width extension. Shrinkable clay is common in the East of England, so foundations near trees and hedges are designed to NHBC-style depth guidance.
How a rear extension in Chafford Hundred comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
Paperwork handled
Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Rear extension planning drawings near Chafford Hundred
We also build rear extensions in nearby South Ockendon (1.4 miles) and Grays (1.6 miles).
- Rear extension planning drawings in South Ockendon
- Rear extension planning drawings in Grays
- Rear extension planning drawings in Swanscombe
- Rear extension planning drawings in Tilbury
- Rear extension planning drawings in Dartford
Other work in Chafford Hundred:
FAQ
Rear extension planning drawings questions in Chafford Hundred
Do you handle building control in Chafford Hundred?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
Do I need a party wall agreement?
In England, usually yes if the extension is on or near a shared boundary or the foundations are close to a neighbour's building. We serve the notices.
Do I need an architect?
You need accurate drawings by someone who knows householder planning; we provide them.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
How long does a rear extension take to build in Chafford Hundred?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
What postcode areas do you cover around Chafford Hundred?
Including RM15, RM17 and RM20, and the surrounding Essex area.