Two-storey extensions in Wealdstone
Need more room in Wealdstone? Two-storey and first-floor extensions add bedrooms and living space without moving. Here's everything we offer locally.
Wealdstone at a glance
- Postcode districts
- HA3
- Area
- Greater London, England
- Price region
- London
- Nearest towns
- Harrow Weald (0.8 miles), Harrow (1.5 miles), Hatch End (1.7 miles), Harrow on the Hill (2 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 HA3 in and around Wealdstone, along with neighbouring Harrow Weald, Harrow and Hatch End.
Extensions available in Wealdstone
Two-storey rear extensions
Design, approvals and build for Wealdstone homes. Guide from £67,000.
Learn more
Two-storey side extensions
From £103,500 in Wealdstone. Free visit to firm it up.
Learn more
Two-storey wraparound extensions
From £144,500 in Wealdstone. Free visit to firm it up.
Learn more
Part single, part two-storey extensions
Design, approvals and build for Wealdstone homes. Guide from £86,500.
Learn more
Extensions over a garage
From £38,000 in Wealdstone. Free visit to firm it up.
Learn more
First-floor extensions
Wealdstone guide price from £30,000, Standard spec.
Learn more
Two-storey extensions for semi-detached houses
Design, approvals and build for Wealdstone homes. Guide from £67,000.
Learn more
Two-storey extensions for detached houses
Wealdstone guide price from £103,500, Standard spec.
Learn more
Kitchen extensions with bedrooms above
For homes in Wealdstone: typical guide from £67,000 (before kitchen units).
Learn more
Extra bedroom and en-suite extensions
Our London guide starts at £67,000 (plus en-suite) for this type.
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 Wealdstone we measure distances to every boundary before suggesting a type.
Also available in Greater London
- 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 Wealdstone
Wealdstone 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 Wealdstone
Do you cover Wealdstone?
Yes. We cover Wealdstone (HA3) and the surrounding area, including Harrow Weald and Harrow. The first site visit is free.
What does a two-storey extension cost in Wealdstone?
Using our London 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 £67,000–£90,500 including VAT. An extension over a garage is about £38,000–£55,000.
Which other places near Wealdstone do you cover?
Everywhere around it, including Harrow Weald (0.8 miles), Harrow (1.5 miles) and Hatch End (1.7 miles), and the rest of Greater London.