Penarth, Cardiff and the Vale
Bungalow rear extension in Penarth
For homes in Penarth, a bungalow rear extension is often the simplest way to gain space without moving. Single-storey rear extensions that keep everything on one level. We take it from survey to completion certificate.
Penarth sits in Cardiff and the Vale, with postcode districts including CF64. For bungalows in Cardiff and the Vale, 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 Penarth?
For Penarth we work from the Wales rate: £1,720–£2,790 per square metre of new floor, including VAT, standard specification. 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 |
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 bungalow rear extension in Penarth?
Whether your bungalow rear extension in Penarth needs a planning application depends on its size, your house and any local restrictions.
In Wales a single-storey rear extension can often be permitted development if it projects no more than 4 metres beyond the rear wall and is no more than 4 metres high. Wales has no prior approval route for deeper extensions, so anything bigger needs a householder planning application.
Conservation areas, National Parks and National Landscapes restrict permitted development in Wales, and listed buildings 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 Penarth like to extend?
Older terraces near the centre and post-war semis further out are typical of Penarth. Sloping sites are common in Wales, so floor levels and retaining walls are designed at the start.
How a bungalow rear extension in Penarth 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.
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 or householder planning application, then Building Regulations drawings to the Welsh Approved Documents and structural calculations, plus party wall notices where they apply.
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 Penarth
We also build rear extensions for bungalows in nearby Cardiff (2.9 miles) and Whitchurch (5.4 miles).
- Bungalow rear extension in Cardiff
- Bungalow rear extension in Whitchurch
- Bungalow rear extension in Barry
- Bungalow rear extension in Rhiwbina
- Bungalow rear extension in Caerphilly
Other work in Penarth:
FAQ
Bungalow rear extension questions in Penarth
What postcode areas do you cover around Penarth?
Including CF64, and the surrounding Cardiff and the Vale area.
How long does a rear extension take to build in Penarth?
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 I need to move out?
Rarely; the opening into the bungalow is made late in the build.
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.
How much does a bungalow rear extension cost in Penarth?
As a guide, £1,720–£2,790 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £20,500–£33,500 at that rate. Your written price follows the survey.
Do you handle building control in Penarth?
Yes. We apply to the council or a registered approver under the Welsh regulations and hand over the completion certificate.