Chorleywood, Hertfordshire
Bungalow rear extension in Chorleywood
Bungalow rear extension in Chorleywood: single-storey rear extensions that keep everything on one level. We measure the house, show you what the rules allow, price it in writing and build it.
We cover Chorleywood (WD3) as part of our Hertfordshire work. For bungalows in Hertfordshire, a rear extension is the usual way to add space without adding stairs.
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 bungalow rear extension cost in Chorleywood?
A bungalow rear extension in Chorleywood is priced at £1,960–£3,180 per square metre including VAT as a guide, before kitchen fit-out and fees. 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 wide × 4 m deep (12 m²) | £23,500–£38,000 |
| 4 m wide × 6 m deep (24 m²) | £47,000–£76,500 |
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 bungalow rear extension in Chorleywood?
Here is how the rules in England apply to a bungalow rear extension in Chorleywood.
Under England's householder permitted development rules you can usually add 3 metres at the back of an attached house, or 4 metres on a detached house, without a planning application, as long as the extension stays under 4 metres high and its eaves stay under 3 metres where it is within 2 metres of a boundary.
If 3 or 4 metres is not enough, England's prior approval route allows 6 metres on a terraced or semi-detached house and 8 metres on a detached house for a single-storey rear extension. Neighbours are consulted, the council decides within 42 days, and the fee is £249, rising to £310 from 8 December 2026.
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 Chorleywood like to extend?
Post-war semis and newer estates are typical of Chorleywood, 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 bungalow rear extension in Chorleywood comes together
Free site visit
We measure the house and garden, look at the back wall, drainage and boundaries, and talk through what you want from the space.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
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.
Bungalow rear extensions near Chorleywood
Neighbouring places we cover include Rickmansworth (1.9 miles) and Batchworth (2.6 miles).
- Bungalow rear extension in Rickmansworth
- Bungalow rear extension in Batchworth
- Bungalow rear extension in Croxley Green
- Bungalow rear extension in Chalfont St Peter
- Bungalow rear extension in West Watford
Other work in Chorleywood:
FAQ
Bungalow rear extension questions in Chorleywood
Is the site visit in Chorleywood 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 Chorleywood house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
How deep can I extend?
The same limits as a house: 3 or 4 metres in England, more with prior approval.
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.
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.
What postcode areas do you cover around Chorleywood?
Including WD3, and the surrounding Hertfordshire area.