Llantrisant, South Wales Valleys
Bungalow rear extension in Llantrisant
Single-storey rear extensions that keep everything on one level. We design, get the approvals for and build rear extensions for bungalows in Llantrisant and the surrounding area, with one contract from the first survey to building control sign-off.
Llantrisant is covered from our South Wales Valleys round, including CF38 and CF72. For Llantrisant bungalows we design the roof first, because the low eaves decide the height of the new room.
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 Llantrisant?
For Llantrisant 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 |
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 Llantrisant?
Planning for a bungalow rear extension in Llantrisant follows the Welsh householder rules.
Welsh permitted development allows a single-storey rear extension of up to 4 metres in depth and 4 metres in height, subject to boundary and garden-coverage limits. There is no larger-extension prior approval scheme in Wales.
Conservation areas, National Parks and National Landscapes restrict permitted development in Wales, and listed buildings 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 Llantrisant like to extend?
Llantrisant is largely terraced streets on sloping ground, where back gardens step up or down from the house. Excavation, retaining walls and drainage are priced at the survey.
How a bungalow rear extension in Llantrisant comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
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.
Bungalow rear extensions near Llantrisant
We also build rear extensions for bungalows in nearby Pontypridd (4.5 miles) and Tonypandy (6.6 miles).
- Bungalow rear extension in Pontypridd
- Bungalow rear extension in Tonypandy
- Bungalow rear extension in Whitchurch
- Bungalow rear extension in Rhiwbina
- Bungalow rear extension in Caerphilly
Other work in Llantrisant:
FAQ
Bungalow rear extension questions in Llantrisant
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 I need planning permission for a rear extension in Llantrisant?
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.
Will the roof look odd?
Not if the pitch and tiles match. Where the eaves are low, a flat-roofed section with a lantern is an alternative.
How long does a rear extension take to build in Llantrisant?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
What postcode areas do you cover around Llantrisant?
Including CF38 and CF72, and the surrounding South Wales Valleys area.
Do you handle building control in Llantrisant?
Yes. We apply to the council or a registered approver under the Welsh regulations and hand over the completion certificate.