Hertford · Design & Build
House Extensions in Hertford
Looking for extension specialists in Hertford? Cheshunt Build is a local design and build team covering Hertford, Bengeo, Hertford Heath and Ware. Single storey rear extensions, side returns, wrap-arounds and double storey extensions, matched to your home and built by one team.
Get your free instant estimate- Fully insured
- Building Control approved
- 12-month guarantee
- Fixed price after a free site visit

Why house extensions work well in Hertford
Hertford blends historic period cottages and townhouses near the centre with generous Victorian villas and modern family homes on the edges, many with the plot space for extensions, garden rooms and full refurbishments. That makes Hertford a great place to extend into the garden or side return, and because we design and build in one team, your drawings are always buildable and your price is set early and honestly.
Planning and building control in Hertford
Hertford sits under East Herts Council. Many rear extensions are permitted development, though depth limits and conservation areas apply, and we handle the application either way. As a design and build team we prepare the drawings and manage the whole process for you, so there is one team accountable from first sketch to sign-off.
What it costs, and how to get a figure
A good quality single storey extension here typically runs from £2,500 to £3,000 per square metre at our standard finish, with kitchens and glazing on top. A luxury specification is priced individually after a site visit. Our online estimator gives you an itemised budget for your Hertford project in about a minute, emailed as a branded PDF, and we confirm a fixed price after a free, no-obligation site visit.
Helpful guides
Frequently asked questions
How much does an extension cost in Hertford?+
A good quality single storey extension here typically runs from £2,500 to £3,000 per square metre at our standard finish, with kitchens and glazing on top. A luxury specification is priced individually after a site visit. Use our instant estimator for a figure tailored to your specific project.
Do I need planning permission in Hertford?+
Many rear extensions are permitted development, though depth limits and conservation areas apply, and we handle the application either way. We check the position for your exact address under East Herts Council.
Which parts of Hertford do you cover?+
All of SG13 and SG14, including Hertford, Bengeo, Hertford Heath and Ware, plus the surrounding areas.
How do I get a quote?+
Use our instant estimator for an itemised budget in about a minute, then we confirm a fixed price after a free site visit.
Free instant quote
Get your itemised quote in 60 seconds
An indicative, itemised budget in about a minute, emailed straight to you as a branded PDF. We confirm a fixed price after a free, no-obligation site visit.
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