Bargoed, South Wales Valleys
Side return extension in Bargoed
Infilling the narrow passage beside a Victorian or Edwardian back addition. We design, get the approvals for and build side return extensions in Bargoed and the surrounding area, with one contract from the first survey to building control sign-off.
Bargoed is covered from our South Wales Valleys round, including CF81. In Bargoed we check the boundary line and the neighbour's gutter before drawing a side return, because a few centimetres decide whether the wall goes on or beside the boundary.
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 side return extension cost in Bargoed?
For Bargoed we work from the Wales rate: £2,140–£3,530 per square metre of new floor, including VAT, standard specification. Prices in Wales sit below our West Midlands baseline; sloping sites are the main variable.
| Size | Guide price inc VAT |
|---|---|
| 2 m wide × 6 m deep (12 m²) | £25,500–£42,500 |
| 2.5 m wide × 7 m deep (17.5 m²) | £37,500–£62,000 |
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 side return extension in Bargoed?
The planning route for a side return extension in Bargoed is set by Wales's householder rules and your council.
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. 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 Bargoed like to extend?
Bargoed is largely terraced streets on sloping ground, where back gardens step up or down from the house. Excavation, retaining walls and drainage are priced at the survey.
How a side return extension in Bargoed 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.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
Paperwork handled
Planning or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
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.
Side return extensions near Bargoed
We also build side return extensions in nearby Blackwood (1.5 miles) and Gelligaer (1.6 miles).
- Side return extension in Blackwood
- Side return extension in Gelligaer
- Side return extension in Nelson
- Side return extension in Treharris
- Side return extension in Abercarn
Other work in Bargoed:
FAQ
Side return extension questions in Bargoed
Do I need planning permission for a rear extension in Bargoed?
Often not for a single-storey rear extension of up to 4 metres under Welsh permitted development. Wales has no prior approval route for deeper extensions.
How much does a side return extension cost in Bargoed?
As a guide, £2,140–£3,530 per square metre including VAT for a standard specification. For example, 2 m wide × 6 m deep (12 m²): about £25,500–£42,500 at that rate. Your written price follows the survey.
Do I need my neighbour's permission?
Not their permission, but in England and Wales you must serve party wall notices, and a neighbour can consent in writing or ask for a surveyor's award.
Can you match the brick or stone on my Bargoed house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
How long does a rear extension take to build in Bargoed?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
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.