Barnham, West Sussex
Terraced house rear extension in Barnham
Rear and side return extensions for terraces, with access through the house and two neighbours. If you live in Barnham and want to know what a terraced house rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Barnham is covered from our West Sussex round, including BN18 and PO22. On a Barnham 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 Barnham?
A terraced house rear extension in Barnham 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 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a terraced house rear extension in Barnham?
Planning for a terraced house rear extension in Barnham follows the English householder rules.
Under England's householder permitted development rules you can usually add 3 metres at the back of an attached house, or 4 metres on a detached house, without a planning application, as long as the extension stays under 4 metres high and its eaves stay under 3 metres where it 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 Barnham like to extend?
Commuter semis and detached houses make up much of Barnham, and longer gardens make England's prior approval route for deeper rear extensions worth considering. Terraced streets make up much of the housing in parts of West Sussex, and most rear extensions here go in without side access.
How a terraced house rear extension in Barnham 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.
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 Barnham
From Barnham, the nearest places we also cover are Bognor Regis (3.9 miles) and Littlehampton (4.5 miles).
- Terraced house rear extension in Bognor Regis
- Terraced house rear extension in Littlehampton
- Terraced house rear extension in Rustington
- Terraced house rear extension in Chichester
- Terraced house rear extension in Selsey
Other work in Barnham:
FAQ
Terraced house rear extension questions in Barnham
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.
Do I need planning permission for a rear extension in Barnham?
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.
How deep can I go on a terrace?
3 metres under permitted development in England, or up to 6 metres with prior approval outside designated land.
Is the site visit in Barnham free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
How much does a terraced house rear extension cost in Barnham?
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.
What postcode areas do you cover around Barnham?
Including BN18 and PO22, and the surrounding West Sussex area.