Croxley Green, Hertfordshire
Terraced house rear extension in Croxley Green
Rear and side return extensions for terraces, with access through the house and two neighbours. If you live in Croxley Green and want to know what a terraced house rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Croxley Green and its postcode districts WD1, WD3 and WD18 are part of our Hertfordshire coverage. In Croxley Green we plan the delivery route through the house and the skip licence before anything else.
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 terraced house rear extension cost in Croxley Green?
For Croxley Green we work from the East of England rate: £2,170–£3,500 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 wide × 4.5 m deep (13.5 m²) | £29,500–£47,000 |
| 3 m wide × 6 m deep (18 m²) | £39,000–£63,000 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a terraced house rear extension in Croxley Green?
Here is how the rules in England apply to a terraced house rear extension in Croxley Green.
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.
The Party Wall etc. Act 1996 applies in England: you serve notice two months before work to a shared wall, and one month before digging foundations within 3 metres (or 6 metres for deeper foundations) of a neighbour's building. Neighbours can agree in writing; if they dissent, surveyors agree an award.
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 Croxley Green like to extend?
Croxley Green mixes Victorian terraces with 1930s semis, so both side returns and full-width kitchen extensions suit houses here.
How a terraced house rear extension in Croxley Green 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.
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.
Terraced house rear extensions near Croxley Green
Neighbouring places we cover include Batchworth (0.6 miles) and Rickmansworth (1.2 miles).
- Terraced house rear extension in Batchworth
- Terraced house rear extension in Rickmansworth
- Terraced house rear extension in Northwood
- Terraced house rear extension in West Watford
- Terraced house rear extension in Watford
Other work in Croxley Green:
FAQ
Terraced house rear extension questions in Croxley Green
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.
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.
How deep can I go on a terrace?
3 metres under permitted development in England, or up to 6 metres with prior approval outside designated land.
Is the site visit in Croxley Green free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Do you handle building control in Croxley Green?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
How long does a rear extension take to build in Croxley Green?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.