Mountain Ash, South Wales Valleys
Rear extension planning drawings in Mountain Ash
Rear extension planning drawings in Mountain Ash: 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.
Mountain Ash sits in the South Wales Valleys, with postcode districts including CF43 and CF45. Planning applications in Mountain Ash go to the local planning authority covering Mountain Ash, 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 Mountain Ash?
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. Ground conditions, glazing, the roof and how far the house is opened up move the final figure within the range.
Do you need planning permission for a rear extension in Mountain Ash?
Planning for a rear extension in Mountain Ash follows the Welsh householder rules.
In Wales a rear extension of more than one storey can be permitted development if the ground floor projects no more than 4 metres and the upper floor no more than 3 metres, with at least 10.5 metres to the rear boundary. It is not permitted development in conservation areas, National Parks or National Landscapes, so many double-storey schemes need a householder application.
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. 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 Mountain Ash like to extend?
Stone terraces along the valley floors and post-war semis higher up are typical of Mountain Ash. Sloping sites are common, so floor levels and retaining walls are designed at the start.
How a rear extension in Mountain Ash 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.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Paperwork handled
Planning or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
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 Mountain Ash
We also build rear extensions in nearby Treharris (3.4 miles) and Rhondda (3.4 miles).
- Rear extension planning drawings in Treharris
- Rear extension planning drawings in Rhondda
- Rear extension planning drawings in Aberdare
- Rear extension planning drawings in Merthyr Tydfil
- Rear extension planning drawings in Nelson
Other work in Mountain Ash:
FAQ
Rear extension planning drawings questions in Mountain Ash
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.
Can you match the brick or stone on my Mountain Ash house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Do I need an architect?
You need accurate drawings by someone who knows householder planning; we provide them.
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.
What postcode areas do you cover around Mountain Ash?
Including CF43 and CF45, and the surrounding South Wales Valleys area.
Do you handle building control in Mountain Ash?
Yes. We apply to the council or a registered approver under the Welsh regulations and hand over the completion certificate.