Aberdare, South Wales Valleys
Side return extension in Aberdare
Infilling the narrow passage beside a Victorian or Edwardian back addition. We design, get the approvals for and build side return extensions in Aberdare and the surrounding area, with one contract from the first survey to building control sign-off.
Aberdare and its postcode districts CF44 are part of our South Wales Valleys coverage. Side return projects in Aberdare usually start with a drainage survey of the side passage.
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 Aberdare?
For Aberdare 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 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a side return extension in Aberdare?
Planning for a side return extension in Aberdare follows the Welsh householder rules.
Welsh side-extension rules limit a single-storey side addition to 4 metres high and a 50% increase in the width of the original house, with tighter limits in conservation areas. Wraparounds usually need a 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. 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 Aberdare like to extend?
Stone terraces along the valley floors and post-war semis higher up are typical of Aberdare. Sloping sites are common, so floor levels and retaining walls are designed at the start.
How a side return extension in Aberdare 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.
Paperwork handled
Planning or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Side return extensions near Aberdare
Close by, we work in Mountain Ash, about 3.6 miles away, and Rhondda, about 3.8 miles away.
- Side return extension in Mountain Ash
- Side return extension in Rhondda
- Side return extension in Merthyr Tydfil
- Side return extension in Tonypandy
- Side return extension in Treharris
Other work in Aberdare:
FAQ
Side return extension questions in Aberdare
What postcode areas do you cover around Aberdare?
Including CF44, and the surrounding South Wales Valleys area.
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.
Glass roof or solid roof with rooflights?
A glass roof gives the most light; a solid roof with long rooflights is warmer and quieter in rain. Both work.
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.
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 Aberdare house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.