Potters Bar, Hertfordshire
Rear extension planning drawings in Potters Bar
For homes in Potters Bar, a rear extension is often the simplest way to gain space without moving. Measured survey, design options, planning drawings and the application, handled for you. We take it from survey to completion certificate.
Potters Bar is covered from our Hertfordshire round, including EN6, WD2 and WD23. Planning applications in Potters Bar go to the local planning authority covering Potters Bar, and we check its local design guidance for rear extensions before drawing.
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 Potters Bar?
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 Potters Bar?
Whether your rear extension in Potters Bar needs a planning application depends on its size, your house and any local restrictions.
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. At the first visit we measure what is there now and tell you which route fits: permitted development, prior approval or a planning application.
What are homes in Potters Bar like to extend?
Potters Bar mixes Victorian terraces with 1930s semis, so both side returns and full-width kitchen extensions suit houses here.
How a rear extension in Potters Bar 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.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
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 Potters Bar
Neighbouring places we cover include Hadley Wood (1.9 miles) and New Barnet (3.0 miles).
- Rear extension planning drawings in Hadley Wood
- Rear extension planning drawings in New Barnet
- Rear extension planning drawings in Barnet
- Rear extension planning drawings in East Barnet
- Rear extension planning drawings in Cockfosters
Other work in Potters Bar:
FAQ
Rear extension planning drawings questions in Potters Bar
What postcode areas do you cover around Potters Bar?
Including EN6, WD2 and WD23, and the surrounding Hertfordshire area.
How long does a rear extension take to build in Potters Bar?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Can planning conditions affect the build?
Yes, for example matching materials or obscure glazing. We plan for them.
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.
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.
What do rear extension planning drawings cost in Potters Bar?
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.