Letchworth Garden City, Hertfordshire
Terraced house rear extension in Letchworth Garden City
Thinking about a terraced house rear extension in Letchworth Garden City? Rear and side return extensions for terraces, with access through the house and two neighbours. Our team handles the drawings, the planning route and the build, and your contract is with one company throughout.
We cover Letchworth Garden City (SG5, SG6 and SG7) as part of our Hertfordshire work. In Letchworth Garden City 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 Letchworth Garden City?
In Letchworth Garden City, our guide for a terraced house rear extension is £2,170–£3,500 per square metre including VAT for a 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 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a terraced house rear extension in Letchworth Garden City?
The planning route for a terraced house rear extension in Letchworth Garden City is set by England's householder rules and your council.
In England a single-storey rear extension can often be built under permitted development: up to 3 metres beyond the original rear wall of an attached house, or 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres if any part 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 Letchworth Garden City like to extend?
Letchworth Garden City mixes Victorian terraces with 1930s semis, so both side returns and full-width kitchen extensions suit houses here. On a Letchworth Garden City terrace both neighbours usually need party wall notices or agreement, so we talk to them early.
How a terraced house rear extension in Letchworth Garden City comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
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.
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.
Terraced house rear extensions near Letchworth Garden City
Close by, we work in Baldock, about 1.7 miles away, and Hitchin, about 3.2 miles away.
- Terraced house rear extension in Baldock
- Terraced house rear extension in Hitchin
- Terraced house rear extension in Henlow
- Terraced house rear extension in Stevenage
- Terraced house rear extension in Biggleswade
Other work in Letchworth Garden City:
FAQ
Terraced house rear extension questions in Letchworth Garden City
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.
Is the site visit in Letchworth Garden City free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Do both neighbours need party wall notices?
Usually yes in England and Wales, because the extension often sits on or near both boundaries.
Do I need planning permission for a rear extension in Letchworth Garden City?
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.
How long does a rear extension take to build in Letchworth Garden City?
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 you match the brick or stone on my Letchworth Garden City house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.