Swanscombe, Kent
Rear extension planning drawings in Swanscombe
We plan and build rear extensions for homeowners in Swanscombe. 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.
We cover Swanscombe (DA10) as part of our Kent work. Rear extension applications in Kent are householder applications, which councils aim to decide within about eight weeks.
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 Swanscombe?
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 Swanscombe?
Whether your rear extension in Swanscombe needs a planning application depends on its size, your house and any local restrictions.
A two-storey rear extension can be permitted development in England only if it projects no more than 3 metres, stays at least 7 metres from the rear boundary, matches the existing roof pitch and has obscure-glazed upper side windows. In practice most double-storey rear extensions go through a householder planning application.
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. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.
What are homes in Swanscombe like to extend?
Commuter semis and detached houses make up much of Swanscombe, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a rear extension in Swanscombe 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.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Paperwork handled
Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
Build and sign-off
We build to the approved drawings with regular updates, then hand over the building control completion certificate and any guarantees from suppliers.
Rear extension planning drawings near Swanscombe
Close by, we work in Grays, about 2.1 miles away, and Tilbury, about 2.3 miles away.
- Rear extension planning drawings in Grays
- Rear extension planning drawings in Tilbury
- Rear extension planning drawings in Gravesend
- Rear extension planning drawings in Chafford Hundred
- Rear extension planning drawings in Longfield
Other work in Swanscombe:
FAQ
Rear extension planning drawings questions in Swanscombe
Who will build my extension?
Vetted building teams working under contract to us. Your contract is with S&K Property Investments and Improvement Ltd for the design and the build.
Do I need planning permission for a rear extension in Swanscombe?
Often not for a single-storey rear extension of up to 3 metres (4 metres on a detached house) under permitted development, or up to 6 or 8 metres with prior approval, unless the house is in a conservation area or its rights have been removed.
Can planning conditions affect the build?
Yes, for example matching materials or obscure glazing. We plan for them.
What do rear extension planning drawings cost in Swanscombe?
As a guide, £1,000–£2,500 including VAT for a single-storey rear extension and £2,000–£3,500 for a two-storey scheme, covering the measured survey, design options and the application. The council fee is extra.
Do you handle building control in Swanscombe?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
Can you match the brick or stone on my Swanscombe house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.