Penarth, Cardiff and the Vale
Rear extension planning drawings in Penarth
Rear extension planning drawings in Penarth: measured survey, design options, planning drawings and the application, handled for you. We measure the house, show you what the rules allow, price it in writing and build it.
Penarth sits in Cardiff and the Vale, with postcode districts including CF64. Planning applications in Penarth go to the local planning authority covering Penarth, and we check its local design guidance for rear extensions before drawing.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
What do rear extension planning drawings cost in Penarth?
As a guide, £1,000–£2,500 including VAT for a single-storey rear extension, or £2,000–£3,500 for a two-storey scheme. Planning fees in Wales are set by the Welsh Government; we confirm the current householder fee when we prepare the application. These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a rear extension in Penarth?
Planning for a rear extension in Penarth follows the Welsh householder rules.
Welsh rules allow a two-storey rear extension without an application only where the ground floor is no deeper than 4 metres, the upper floor no deeper than 3 metres and at least 10.5 metres remains to the rear boundary. Most homeowners still apply for householder planning permission.
Welsh councils aim to decide householder applications within 8 weeks.
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?
Penarth has Victorian terraces near the centre and semis further out. Welsh permitted development allows up to 4 metres at the rear for many houses.
How a 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.
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.
Rear extension planning drawings near Penarth
We also build rear extensions in nearby Cardiff (2.9 miles) and Whitchurch (5.4 miles).
- Rear extension planning drawings in Cardiff
- Rear extension planning drawings in Whitchurch
- Rear extension planning drawings in Barry
- Rear extension planning drawings in Rhiwbina
- Rear extension planning drawings in Caerphilly
Other work in Penarth:
FAQ
Rear extension planning drawings questions in Penarth
What do rear extension planning drawings cost in Penarth?
As a guide, £1,000–£2,500 including VAT for a single-storey rear extension and £2,000–£3,500 for a two-storey scheme, covering the measured survey, design options and the application. The council fee is extra.
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.
Can I see the design in 3D?
Yes; we produce simple 3D views so you can judge the size and light.
What postcode areas do you cover around Penarth?
Including CF64, and the surrounding Cardiff and the Vale area.
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.
Is the site visit in Penarth free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.