Sunbury-on-Thames, Surrey
Terraced house rear extension in Sunbury-on-Thames
Terraced house rear extension in Sunbury-on-Thames: rear and side return extensions for terraces, with access through the house and two neighbours. We measure the house, show you what the rules allow, price it in writing and build it.
Sunbury-on-Thames sits in Surrey, with postcode districts including KT12, TW16 and TW17. On a Sunbury-on-Thames terrace both neighbours usually need party wall notices or agreement, so we talk to them early.
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 terraced house rear extension cost in Sunbury-on-Thames?
A terraced house rear extension in Sunbury-on-Thames is priced at £2,300–£3,700 per square metre including VAT as a guide, before kitchen fit-out and fees. South East prices run above our West Midlands baseline, mainly on labour rates and clay-soil foundations.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4.5 m deep (13.5 m²) | £31,000–£50,000 |
| 3 m wide × 6 m deep (18 m²) | £41,500–£66,500 |
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 terraced house rear extension in Sunbury-on-Thames?
Planning for a terraced house rear extension in Sunbury-on-Thames follows the English householder rules.
In England a single-storey rear extension can often be built under permitted development: up to 3 metres beyond the original rear wall of an attached house, or 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres if any part is within 2 metres of a boundary.
The Party Wall etc. Act 1996 applies in England: you serve notice two months before work to a shared wall, and one month before digging foundations within 3 metres (or 6 metres for deeper foundations) of a neighbour's building. Neighbours can agree in writing; if they dissent, surveyors agree an award.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. We check your house's planning history and any conservation area before drawing, so the route is clear before you spend on plans.
What are homes in Sunbury-on-Thames like to extend?
Commuter semis and detached houses make up much of Sunbury-on-Thames, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a terraced house rear extension in Sunbury-on-Thames comes together
Free site visit
We measure the house and garden, look at the back wall, drainage and boundaries, and talk through what you want from the space.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Paperwork handled
Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Terraced house rear extensions near Sunbury-on-Thames
Neighbouring places we cover include Walton-on-Thames (1.2 miles) and Shepperton (1.5 miles).
- Terraced house rear extension in Walton-on-Thames
- Terraced house rear extension in Shepperton
- Terraced house rear extension in West Molesey
- Terraced house rear extension in Hampton
- Terraced house rear extension in Hanworth
Other work in Sunbury-on-Thames:
FAQ
Terraced house rear extension questions in Sunbury-on-Thames
Do I need a party wall agreement?
In England, usually yes if the extension is on or near a shared boundary or the foundations are close to a neighbour's building. We serve the notices.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
Do both neighbours need party wall notices?
Usually yes in England and Wales, because the extension often sits on or near both boundaries.
Do I need planning permission for a rear extension in Sunbury-on-Thames?
Often not for a single-storey rear extension of up to 3 metres (4 metres on a detached house) under permitted development, or up to 6 or 8 metres with prior approval, unless the house is in a conservation area or its rights have been removed.
Can you match the brick or stone on my Sunbury-on-Thames house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
How much does a terraced house rear extension cost in Sunbury-on-Thames?
As a guide, £2,300–£3,700 per square metre including VAT for a standard specification. For example, 3 m wide × 4.5 m deep (13.5 m²): about £31,000–£50,000 at that rate. Your written price follows the survey.