Two-storey extensions in Chorleywood
Planning a bigger home in Chorleywood? Compare extension types and guide prices below, then book a free site visit.
Chorleywood at a glance
- Postcode districts
- WD3
- Area
- Hertfordshire, England
- Price region
- East of England
- Nearest towns
- Rickmansworth (1.9 miles), Batchworth (2.6 miles), Croxley Green (3.1 miles), Chalfont Saint Peter (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 Chorleywood (WD3) and the places around it, including Rickmansworth (1.9 miles), Batchworth (2.6 miles) and Croxley Green.
Extensions available in Chorleywood
Two-storey rear extensions
Design, approvals and build for Chorleywood homes. Guide from £57,500.
Learn more
Two-storey side extensions
Design, approvals and build for Chorleywood homes. Guide from £88,500.
Learn more
Two-storey wraparound extensions
For homes in Chorleywood: typical guide from £124,000.
Learn more
Part single, part two-storey extensions
Our East of England guide starts at £74,000 for this type.
Learn more
Extensions over a garage
Guide from £32,500 in Chorleywood, including VAT.
Learn more
First-floor extensions
Design, approvals and build for Chorleywood homes. Guide from £26,000.
Learn more
Two-storey extensions for semi-detached houses
From £57,500 in Chorleywood. Free visit to firm it up.
Learn more
Two-storey extensions for detached houses
Design, approvals and build for Chorleywood homes. Guide from £88,500.
Learn more
Kitchen extensions with bedrooms above
Chorleywood guide price from £57,500 (before kitchen units), Standard spec.
Learn more
Extra bedroom and en-suite extensions
From £57,500 (plus en-suite) in Chorleywood. Free visit to firm it up.
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 Chorleywood 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 Chorleywood
Chorleywood 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 Chorleywood
Do you cover Chorleywood?
Yes. We cover Chorleywood (WD3) and the surrounding area, including Rickmansworth and Batchworth. The first site visit is free.
What does a two-storey extension cost in Chorleywood?
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 Chorleywood do you cover?
Everywhere around it, including Rickmansworth (1.9 miles), Batchworth (2.6 miles) and Croxley Green (3.1 miles), and the rest of Hertfordshire.