Hemel Hempstead, Hertfordshire
Terraced house rear extension in Hemel Hempstead
Rear and side return extensions for terraces, with access through the house and two neighbours. We design, get the approvals for and build rear extensions for terraced houses in Hemel Hempstead and the surrounding area, with one contract from the first survey to building control sign-off.
Hemel Hempstead and its postcode districts HP1, HP2 and HP3 are part of our Hertfordshire coverage. Terraced streets make up much of the housing in parts of Hertfordshire, and most rear extensions here go in without side access.
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 Hemel Hempstead?
For Hemel Hempstead 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 Hemel Hempstead?
Whether your terraced house rear extension in Hemel Hempstead needs a planning application depends on its size, your house and any local restrictions.
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 Hemel Hempstead like to extend?
Post-war semis and newer estates are typical of Hemel Hempstead, 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 terraced house rear extension in Hemel Hempstead 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.
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.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Terraced house rear extensions near Hemel Hempstead
From Hemel Hempstead, the nearest places we also cover are Abbots Langley (3.6 miles) and Berkhamsted (5.0 miles).
- Terraced house rear extension in Abbots Langley
- Terraced house rear extension in Berkhamsted
- Terraced house rear extension in St Albans
- Terraced house rear extension in North Watford
- Terraced house rear extension in Harpenden
Other work in Hemel Hempstead:
FAQ
Terraced house rear extension questions in Hemel Hempstead
Do I need planning permission for a rear extension in Hemel Hempstead?
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.
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.
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.
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.
Do you handle building control in Hemel Hempstead?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
What postcode areas do you cover around Hemel Hempstead?
Including HP1, HP2 and HP3, and the surrounding Hertfordshire area.