Two-storey extensions in Croxley Green
Planning a bigger home in Croxley Green? Compare extension types and guide prices below, then book a free site visit.
Croxley Green at a glance
- Postcode districts
- WD3
- Area
- Hertfordshire, England
- Price region
- East of England
- Nearest towns
- Batchworth (0.6 miles), Rickmansworth (1.2 miles), Holywell (Hertfordshire) (1.4 miles), Northwood (1.9 miles)
- Distance to Watford
- about 2.8 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.
Around Croxley Green we also work in Batchworth, Rickmansworth and Holywell (Hertfordshire), and across the rest of Hertfordshire. Postcode district in and near Croxley Green: WD3.
Extensions available in Croxley Green
Two-storey rear extensions
Guide from £57,500 in Croxley Green, including VAT.
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Two-storey side extensions
Design, approvals and build for Croxley Green homes. Guide from £88,500.
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Two-storey wraparound extensions
Design, approvals and build for Croxley Green homes. Guide from £124,000.
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Part single, part two-storey extensions
Croxley Green guide price from £74,000, Standard spec.
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Extensions over a garage
Guide from £32,500 in Croxley Green, including VAT.
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First-floor extensions
Croxley Green guide price from £26,000, Standard spec.
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Two-storey extensions for semi-detached houses
From £57,500 in Croxley Green. Free visit to firm it up.
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Two-storey extensions for detached houses
Design, approvals and build for Croxley Green homes. Guide from £88,500.
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Kitchen extensions with bedrooms above
Design, approvals and build for Croxley Green homes. Guide from £57,500 (before kitchen units).
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Extra bedroom and en-suite extensions
Croxley Green guide price from £57,500 (plus en-suite), Standard spec.
Learn moreWhich type suits your house?
Start with what you need the space for. Bedrooms and an en-suite upstairs with a bigger kitchen below is the classic two-storey brief, but in Croxley Green we also design annexes, home offices and bedrooms over garages.
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 Croxley Green
Croxley Green 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 Croxley Green
Do you cover Croxley Green?
Yes. We cover Croxley Green (WD3) and the surrounding area, including Batchworth and Rickmansworth. The first site visit is free.
What does a two-storey extension cost in Croxley Green?
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 Croxley Green do you cover?
Everywhere around it, including Batchworth (0.6 miles), Rickmansworth (1.2 miles) and Holywell (Hertfordshire) (1.4 miles), and the rest of Hertfordshire.