Two-storey extensions in Borehamwood
Homeowners in Borehamwood can use us for the whole project or just the drawings and approvals. Start with a free visit.
Borehamwood at a glance
- Postcode districts
- WD6 and WD7
- Area
- Hertfordshire, England
- Price region
- East of England
- Nearest towns
- Edgware (2.9 miles), Barnet (3.3 miles), Bushey (3.6 miles), Totteridge (3.6 miles)
- Distance to Watford
- about 5.1 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 Borehamwood (WD6 and WD7) and the places around it, including Edgware (2.9 miles), Barnet (3.3 miles) and Bushey.
Extensions available in Borehamwood
Two-storey rear extensions
Borehamwood guide price from £57,500, Standard spec.
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Two-storey side extensions
Guide from £88,500 in Borehamwood, including VAT.
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Two-storey wraparound extensions
For homes in Borehamwood: typical guide from £124,000.
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Part single, part two-storey extensions
Borehamwood guide price from £74,000, Standard spec.
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Extensions over a garage
Design, approvals and build for Borehamwood homes. Guide from £32,500.
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First-floor extensions
Borehamwood guide price from £26,000, Standard spec.
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Two-storey extensions for semi-detached houses
Guide from £57,500 in Borehamwood, including VAT.
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Two-storey extensions for detached houses
Guide from £88,500 in Borehamwood, including VAT.
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Kitchen extensions with bedrooms above
Guide from £57,500 (before kitchen units) in Borehamwood, including VAT.
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Extra bedroom and en-suite extensions
Borehamwood guide price from £57,500 (plus en-suite), Standard spec.
Learn moreWhich type suits your house?
Which type suits your house in Borehamwood depends mostly on where you have room. A deep garden points to a rear extension; space beside the house points to a side or over-garage extension; a house that already has a single-storey extension can often take a first floor on top.
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 Borehamwood
Borehamwood 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 Borehamwood
Do you cover Borehamwood?
Yes. We cover Borehamwood (WD6 and WD7) and the surrounding area, including Edgware and Barnet. The first site visit is free.
What does a two-storey extension cost in Borehamwood?
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 Borehamwood do you cover?
Everywhere around it, including Edgware (2.9 miles), Barnet (3.3 miles) and Bushey (3.6 miles), and the rest of Hertfordshire.