Two-storey extensions in Hertford
From over-garage bedrooms to full wraparounds, we cover every kind of two-storey extension in Hertford.
Hertford at a glance
- Postcode districts
- SG13 and SG14
- Area
- Hertfordshire, England
- Price region
- East of England
- Nearest towns
- Ware (2.4 miles), Hoddesdon (3.7 miles), Broxbourne (4.2 miles), Welwyn Garden City (5.5 miles)
- Distance to Watford
- about 16.7 miles
- Approvals
- Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Side, wraparound and front: planning permission.
We cover postcode districts SG13 and SG14 in and around Hertford, along with neighbouring Ware, Hoddesdon and Broxbourne.
Extensions available in Hertford
Two-storey rear extensions
Hertford guide price from £57,500, Standard spec.
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Two-storey side extensions
Our East of England guide starts at £88,500 for this type.
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Two-storey wraparound extensions
From £124,000 in Hertford. Free visit to firm it up.
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Part single, part two-storey extensions
For homes in Hertford: typical guide from £74,000.
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Extensions over a garage
Design, approvals and build for Hertford homes. Guide from £32,500.
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First-floor extensions
From £26,000 in Hertford. Free visit to firm it up.
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Two-storey extensions for semi-detached houses
For homes in Hertford: typical guide from £57,500.
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Two-storey extensions for detached houses
From £88,500 in Hertford. Free visit to firm it up.
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Kitchen extensions with bedrooms above
From £57,500 (before kitchen units) in Hertford. Free visit to firm it up.
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Extra bedroom and en-suite extensions
Guide from £57,500 (plus en-suite) in Hertford, including VAT.
Learn moreWhich type suits your house?
The boundaries usually decide it. Two-storey work close to a neighbour needs careful design for light and privacy, so at the visit in Hertford we measure distances to every boundary before suggesting a type.
Also available in Hertfordshire
- Two-storey front extensions
- Two-storey extensions for end-of-terrace houses
- Two-storey annexe extensions
- Garage conversions with a room above
- Two-storey extension plans and drawings
- Planning permission for two-storey extensions
- Structural engineering for two-storey extensions
- Building regulations for two-storey extensions
- Party wall notices for extensions
- Design and build two-storey extensions
Rules for Hertford
Hertford is in England. Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Side, wraparound and front: planning permission. Householder planning application: £548 (or £575 for applications made from 8 December 2026). Lawful development certificate: £274 (about £288 for applications from 8 December 2026). Councils should decide householder applications within 8 weeks of validation.
The full England rules explained
Questions about extensions in Hertford
Do you cover Hertford?
Yes. We cover Hertford (SG13 and SG14) and the surrounding area, including Ware and Hoddesdon. The first site visit is free.
What does a two-storey extension cost in Hertford?
Using our East of England guide, a two-storey rear extension with a 4 m × 3.5 m footprint on two floors (28 m² of new floor space) is about £57,500–£78,000 including VAT. An extension over a garage is about £32,500–£47,500.
Which other places near Hertford do you cover?
Everywhere around it, including Ware (2.4 miles), Hoddesdon (3.7 miles) and Broxbourne (4.2 miles), and the rest of Hertfordshire.