Merthyr Tydfil, South Wales Valleys
Wraparound extension in Merthyr Tydfil
For homes in Merthyr Tydfil, a wraparound extension is often the simplest way to gain space without moving. An L-shaped extension that fills the side return and runs across the back. We take it from survey to completion certificate.
Merthyr Tydfil sits in the South Wales Valleys, with postcode districts including CF47 and CF48. Wraparounds are the natural next step for the end-of-terrace and Victorian houses in the South Wales Valleys where a side return alone would leave the room too narrow.
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 wraparound extension cost in Merthyr Tydfil?
Guide prices for a wraparound extension in Merthyr Tydfil start from our Wales rate of £2,050–£3,350 per square metre, including VAT. Prices in Wales sit below our West Midlands baseline; sloping sites are the main variable.
| Size | Guide price inc VAT |
|---|---|
| L-shaped, about 22 m² of new floor | £45,000–£73,500 |
| L-shaped, about 30 m² of new floor | £61,500–£100,500 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a wraparound extension in Merthyr Tydfil?
Here is how the rules in Wales apply to a wraparound extension in Merthyr Tydfil.
In Wales a single-storey side extension can be permitted development if it is no more than 4 metres high and the house ends up no more than 50% wider than the original. Many side return infills on terraced streets, and most wraparounds, go through a householder application.
The Party Wall etc. Act 1996 also applies in Wales: two months' notice for work to a shared wall and one month for foundations dug close to a neighbour's building.
Conservation areas, National Parks and National Landscapes restrict permitted development in Wales, and listed buildings need listed building consent. At the first visit we measure what is there now and tell you which route fits: permitted development or a householder planning application.
What are homes in Merthyr Tydfil like to extend?
Stone terraces along the valley floors and post-war semis higher up are typical of Merthyr Tydfil. Sloping sites are common, so floor levels and retaining walls are designed at the start.
How a wraparound extension in Merthyr Tydfil 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.
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.
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.
Wraparound extensions near Merthyr Tydfil
From Merthyr Tydfil, the nearest places we also cover are Aberdare (3.8 miles) and Mountain Ash (4.4 miles).
- Wraparound extension in Aberdare
- Wraparound extension in Mountain Ash
- Wraparound extension in Tredegar
- Wraparound extension in Treharris
- Wraparound extension in Rhondda
Other work in Merthyr Tydfil:
FAQ
Wraparound extension questions in Merthyr Tydfil
Is the site visit in Merthyr Tydfil free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Can you match the brick or stone on my Merthyr Tydfil house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
Is it worth it over a side return alone?
If you want a dining table and a sofa as well as the kitchen, usually yes.
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 long does a rear extension take to build in Merthyr Tydfil?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
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.