Walton-on-Thames, Surrey
Two-storey rear extension in Walton-on-Thames
A larger kitchen downstairs and an extra bedroom or bathroom upstairs, under one roof. We design, get the approvals for and build two-storey rear extensions in Walton-on-Thames and the surrounding area, with one contract from the first survey to building control sign-off.
Walton-on-Thames sits in Surrey, with postcode districts including KT12, TW16 and TW17. Two-storey rear extensions suit semi-detached houses in Walton-on-Thames best, where the extra bedroom matters as much as the bigger kitchen.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a two-storey rear extension cost in Walton-on-Thames?
For Walton-on-Thames we work from the South East England rate: £2,020–£3,020 per square metre of new floor, including VAT, standard specification. South East prices run above our West Midlands baseline, mainly on labour rates and clay-soil foundations.
| Size | Guide price inc VAT |
|---|---|
| 3 m × 5 m footprint, two floors (30 m²) | £60,500–£90,500 |
| 4 m × 6 m footprint, two floors (48 m²) | £97,000–£145,000 |
We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.
Do you need planning permission for a two-storey rear extension in Walton-on-Thames?
Planning for a two-storey rear extension in Walton-on-Thames follows the English householder rules.
A two-storey rear extension can be permitted development in England only if it projects no more than 3 metres, stays at least 7 metres from the rear boundary, matches the existing roof pitch and has obscure-glazed upper side windows. In practice most double-storey rear extensions go through a householder planning application.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.
What are homes in Walton-on-Thames like to extend?
Around Walton-on-Thames the housing ranges from inter-war semis to 1960s and 1970s estates with good-sized gardens. Many of the newer estates had permitted development rights removed by condition, so we check the planning history before anything is drawn.
How a two-storey rear extension in Walton-on-Thames comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Approvals
Permitted development check, prior approval or planning application, then Building Regulations drawings and structural calculations, plus party wall notices where they apply.
Build and sign-off
We build to the approved drawings with regular updates, then hand over the building control completion certificate and any guarantees from suppliers.
Two-storey rear extensions near Walton-on-Thames
Close by, we work in Sunbury-on-Thames, about 1.2 miles away, and Shepperton, about 1.7 miles away.
- Two-storey rear extension in Sunbury-on-Thames
- Two-storey rear extension in Shepperton
- Two-storey rear extension in West Molesey
- Two-storey rear extension in Weybridge
- Two-storey rear extension in Esher
Other work in Walton-on-Thames:
FAQ
Two-storey rear extension questions in Walton-on-Thames
Can you match the brick or stone on my Walton-on-Thames house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Who will build my extension?
Vetted building teams working under contract to us. Your contract is with S&K Property Investments and Improvement Ltd for the design and the build.
Can I add an en-suite upstairs?
Yes. We plan the soil pipe route early so the bathroom sits where drainage works without boxing through the room below.
Can I get a price without a visit?
Our online guide-price tool gives a range in a couple of minutes. A written price needs a survey.
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.
Do you handle building control in Walton-on-Thames?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.