Potters Bar, Hertfordshire
Two-storey rear extension in Potters Bar
For homes in Potters Bar, a two-storey rear extension is often the simplest way to gain space without moving. A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. We take it from survey to completion certificate.
Potters Bar and its postcode districts EN6, WD2 and WD23 are part of our Hertfordshire coverage. Two-storey rear extensions suit semi-detached houses in Potters Bar best, where the extra bedroom matters as much as the bigger kitchen.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a two-storey rear extension cost in Potters Bar?
For Potters Bar we work from the East of England rate: £1,910–£2,860 per square metre of new floor, including VAT, standard specification. East of England prices run slightly above our West Midlands baseline; clay soils near trees are the main foundation variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m × 5 m footprint, two floors (30 m²) | £57,000–£86,000 |
| 4 m × 6 m footprint, two floors (48 m²) | £91,500–£137,500 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a two-storey rear extension in Potters Bar?
The planning route for a two-storey rear extension in Potters Bar is set by England's householder rules and your council.
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.
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?
Post-war semis and newer estates are typical of Potters Bar, 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 two-storey 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.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
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.
Two-storey rear extensions near Potters Bar
From Potters Bar, the nearest places we also cover are Hadley Wood (1.9 miles) and New Barnet (3.0 miles).
- Two-storey rear extension in Hadley Wood
- Two-storey rear extension in New Barnet
- Two-storey rear extension in Barnet
- Two-storey rear extension in East Barnet
- Two-storey rear extension in Cockfosters
Other work in Potters Bar:
FAQ
Two-storey rear extension questions in Potters Bar
Is the site visit in Potters Bar free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Can you match the brick or stone on my Potters Bar house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Will we need to move out?
Rarely. The first-floor opening is made late in the job and sealed with temporary screens.
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.
What postcode areas do you cover around Potters Bar?
Including EN6, WD2 and WD23, and the surrounding Hertfordshire area.
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.