Caerphilly, South Wales Valleys
Bungalow rear extension in Caerphilly
Single-storey rear extensions that keep everything on one level. If you live in Caerphilly and want to know what a bungalow rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Caerphilly sits in the South Wales Valleys, with postcode districts including CF83. For bungalows in the South Wales Valleys, a rear extension is the usual way to add space without adding stairs.
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 bungalow rear extension cost in Caerphilly?
Guide prices for a bungalow rear extension in Caerphilly start from our Wales rate of £1,720–£2,790 per square metre, including VAT. Prices in Wales sit below our West Midlands baseline; sloping sites are the main variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £20,500–£33,500 |
| 4 m wide × 6 m deep (24 m²) | £41,500–£67,000 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a bungalow rear extension in Caerphilly?
The planning route for a bungalow rear extension in Caerphilly is set by Wales's householder rules and your council.
The Welsh Government's householder rules let many homes add a single-storey rear extension up to 4 metres deep and 4 metres high without a planning application. Deeper projects go through a householder application, because Wales has no prior approval route.
Conservation areas, National Parks and National Landscapes restrict permitted development in Wales, and listed buildings need listed building consent. At the first visit we measure what is there now and tell you which route fits: permitted development or a householder planning application.
What are homes in Caerphilly like to extend?
Stone terraces along the valley floors and post-war semis higher up are typical of Caerphilly. Sloping sites are common, so floor levels and retaining walls are designed at the start.
How a bungalow rear extension in Caerphilly 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 or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Bungalow rear extensions near Caerphilly
We also build rear extensions for bungalows in nearby Rhiwbina (3.2 miles) and Whitchurch (4.3 miles).
- Bungalow rear extension in Rhiwbina
- Bungalow rear extension in Whitchurch
- Bungalow rear extension in Risca
- Bungalow rear extension in Pontypridd
- Bungalow rear extension in Nelson
Other work in Caerphilly:
FAQ
Bungalow rear extension questions in Caerphilly
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 Caerphilly?
Often not for a single-storey rear extension of up to 4 metres under Welsh permitted development. Wales has no prior approval route for deeper extensions.
Can I extend the loft as well?
Sometimes, but that is a different project; a rear extension keeps everything on one level.
How long does a rear extension take to build in Caerphilly?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Do you handle building control in Caerphilly?
Yes. We apply to the council or a registered approver under the Welsh regulations and hand over the completion certificate.
Do I need a party wall agreement?
In Wales, usually yes if the extension is on or near a shared boundary or close to a neighbour's foundations. We serve the notices.