Carmarthen, West Wales
Rear extension planning drawings in Carmarthen
For homes in Carmarthen, a rear extension is often the simplest way to gain space without moving. Measured survey, design options, planning drawings and the application, handled for you. We take it from survey to completion certificate.
Carmarthen sits in West Wales, with postcode districts including SA31. Planning applications in Carmarthen go to the local planning authority covering Carmarthen, 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 Carmarthen?
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 Carmarthen?
Here is how the rules in Wales apply to a rear extension in Carmarthen.
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 Carmarthen like to extend?
Older terraces near the centre and post-war semis further out are typical of Carmarthen. Sloping sites are common in Wales, so floor levels and retaining walls are designed at the start.
How a rear extension in Carmarthen 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.
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.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Rear extension planning drawings near Carmarthen
Neighbouring places we cover include Llanelli (13.5 miles) and Ammanford (14.2 miles).
- Rear extension planning drawings in Llanelli
- Rear extension planning drawings in Ammanford
- Rear extension planning drawings in Gorseinon
- Rear extension planning drawings in Clydach
- Rear extension planning drawings in Swansea
Other work in Carmarthen:
FAQ
Rear extension planning drawings questions in Carmarthen
What postcode areas do you cover around Carmarthen?
Including SA31, and the surrounding West Wales area.
Who will build my extension?
Vetted building teams working under contract to us. Your contract is with S&K Property Investments and Improvement Ltd for the design and the build.
Do neighbours get consulted?
Yes for a full application: the council writes to them or puts up a site notice.
Is the site visit in Carmarthen free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
How long does a rear extension take to build in Carmarthen?
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 do rear extension planning drawings cost in Carmarthen?
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.