Gelligaer, South Wales Valleys
Terraced house rear extension in Gelligaer
For homes in Gelligaer, a terraced house rear extension is often the simplest way to gain space without moving. Rear and side return extensions for terraces, with access through the house and two neighbours. We take it from survey to completion certificate.
Gelligaer is covered from our South Wales Valleys round, including CF82. On a Gelligaer terrace both neighbours usually need party wall notices or agreement, so we talk to them early.
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 terraced house rear extension cost in Gelligaer?
A terraced house rear extension in Gelligaer is priced at £1,910–£3,070 per square metre including VAT as a guide, before kitchen fit-out and fees. Prices in Wales sit below our West Midlands baseline; sloping sites are the main variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4.5 m deep (13.5 m²) | £25,500–£41,500 |
| 3 m wide × 6 m deep (18 m²) | £34,500–£55,000 |
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 terraced house rear extension in Gelligaer?
The planning route for a terraced house rear extension in Gelligaer is set by Wales's householder rules and your council.
In Wales a single-storey rear extension can often be permitted development if it projects no more than 4 metres beyond the rear wall and is no more than 4 metres high. Wales has no prior approval route for deeper extensions, so anything bigger needs a householder planning application.
In Wales, as in England, the Party Wall etc. Act 1996 requires notice to neighbours before work to a shared wall or excavation near their foundations.
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 Gelligaer like to extend?
Stone terraces along the valley floors and post-war semis higher up are typical of Gelligaer. Sloping sites are common, so floor levels and retaining walls are designed at the start.
How a terraced house rear extension in Gelligaer 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.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
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.
Terraced house rear extensions near Gelligaer
Neighbouring places we cover include Nelson (1.4 miles) and Bargoed (1.6 miles).
- Terraced house rear extension in Nelson
- Terraced house rear extension in Bargoed
- Terraced house rear extension in Blackwood
- Terraced house rear extension in Treharris
- Terraced house rear extension in Abercarn
Other work in Gelligaer:
FAQ
Terraced house rear extension questions in Gelligaer
Is the site visit in Gelligaer free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Do you handle building control in Gelligaer?
Yes. We apply to the council or a registered approver under the Welsh regulations and hand over the completion certificate.
Do both neighbours need party wall notices?
Usually yes in England and Wales, because the extension often sits on or near both boundaries.
How much does a terraced house rear extension cost in Gelligaer?
As a guide, £1,910–£3,070 per square metre including VAT for a standard specification. For example, 3 m wide × 4.5 m deep (13.5 m²): about £25,500–£41,500 at that rate. Your written price follows the survey.
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.
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.