Two-storey extensions in Berkhamsted
Everything for a two-storey extension in Berkhamsted, in one place: types, guide prices for the East of England, the approval rules in England and how to get started.
Berkhamsted at a glance
- Postcode districts
- HP4
- Area
- Hertfordshire, England
- Price region
- East of England
- Nearest towns
- Chesham (4.4 miles), Tring (4.6 miles), Hemel Hempstead (5 miles), Leverstock Green (5.7 miles)
- Distance to Watford
- about 10.3 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 district HP4 in and around Berkhamsted, along with neighbouring Chesham, Tring and Hemel Hempstead.
Extensions available in Berkhamsted
Two-storey rear extensions
From £57,500 in Berkhamsted. Free visit to firm it up.
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Two-storey side extensions
From £88,500 in Berkhamsted. Free visit to firm it up.
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Two-storey wraparound extensions
Berkhamsted guide price from £124,000, Standard spec.
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Part single, part two-storey extensions
For homes in Berkhamsted: typical guide from £74,000.
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Extensions over a garage
For homes in Berkhamsted: typical guide from £32,500.
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First-floor extensions
For homes in Berkhamsted: typical guide from £26,000.
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Two-storey extensions for semi-detached houses
Berkhamsted guide price from £57,500, Standard spec.
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Two-storey extensions for detached houses
Design, approvals and build for Berkhamsted homes. Guide from £88,500.
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Kitchen extensions with bedrooms above
For homes in Berkhamsted: typical guide from £57,500 (before kitchen units).
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Extra bedroom and en-suite extensions
Guide from £57,500 (plus en-suite) in Berkhamsted, including VAT.
Learn moreWhich type suits your house?
Rear, side, wraparound or over the garage: each adds space in a different way. For most houses in Hertfordshire, one or two of these will clearly suit the plot better than the rest, and we'll tell you which.
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 Berkhamsted
Berkhamsted 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 Berkhamsted
Do you cover Berkhamsted?
Yes. We cover Berkhamsted (HP4) and the surrounding area, including Chesham and Tring. The first site visit is free.
What does a two-storey extension cost in Berkhamsted?
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 Berkhamsted do you cover?
Everywhere around it, including Chesham (4.4 miles), Tring (4.6 miles) and Hemel Hempstead (5 miles), and the rest of Hertfordshire.