Two-storey extensions in Mountain Ash
Need more room in Mountain Ash? Two-storey and first-floor extensions add bedrooms and living space without moving. Here's everything we offer locally.
Mountain Ash at a glance
- Postcode districts
- CF45
- Area
- Mid Glamorgan, Wales
- Price region
- Wales
- Nearest towns
- Abercanaid (2.8 miles), Ferndale (3.3 miles), Treharris (3.4 miles), Rhondda (3.4 miles)
- Distance to Rhondda
- about 3.4 miles
- Approvals
- Two-storey rear: ground floor up to 4 m, first floor up to 3 m and 10.5 m from the rear boundary. Some two-storey side extensions can be permitted development.
Around Mountain Ash we also work in Abercanaid, Ferndale and Treharris, and across the rest of Mid Glamorgan. Postcode district in and near Mountain Ash: CF45.
Extensions available in Mountain Ash
Two-storey rear extensions
From £51,500 in Mountain Ash. Free visit to firm it up.
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Two-storey side extensions
Guide from £79,000 in Mountain Ash, including VAT.
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Two-storey wraparound extensions
Design, approvals and build for Mountain Ash homes. Guide from £111,000.
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Part single, part two-storey extensions
From £66,000 in Mountain Ash. Free visit to firm it up.
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Extensions over a garage
For homes in Mountain Ash: typical guide from £29,000.
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First-floor extensions
Our Wales guide starts at £23,000 for this type.
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Two-storey extensions for semi-detached houses
From £51,500 in Mountain Ash. Free visit to firm it up.
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Two-storey extensions for detached houses
Our Wales guide starts at £79,000 for this type.
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Kitchen extensions with bedrooms above
For homes in Mountain Ash: typical guide from £51,500 (before kitchen units).
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Extra bedroom and en-suite extensions
For homes in Mountain Ash: typical guide from £51,500 (plus en-suite).
Learn moreWhich type suits your house?
Start with what you need the space for. Bedrooms and an en-suite upstairs with a bigger kitchen below is the classic two-storey brief, but in Mountain Ash we also design annexes, home offices and bedrooms over garages.
Also available in Mid Glamorgan
- Two-storey front extensions
- Two-storey extensions for end-of-terrace houses
- Two-storey annexe extensions
- Garage conversions with a room above
- Two-storey extension plans and drawings
- Planning permission for two-storey extensions
- Structural engineering for two-storey extensions
- Building regulations for two-storey extensions
- Party wall notices for extensions
- Design and build two-storey extensions
Rules for Mountain Ash
Mountain Ash is in Wales. Two-storey rear: ground floor up to 4 m, first floor up to 3 m and 10.5 m from the rear boundary. Some two-storey side extensions can be permitted development. Householder planning application: £585. Councils normally decide householder applications within 8 weeks.
The full Wales rules explained
Questions about extensions in Mountain Ash
Do you cover Mountain Ash?
Yes. We cover Mountain Ash (CF45) and the surrounding area, including Abercanaid and Ferndale. The first site visit is free.
What does a two-storey extension cost in Mountain Ash?
Using our Wales guide, a two-storey rear extension with a 4 m × 3.5 m footprint on two floors (28 m² of new floor space) is about £51,500–£69,500 including VAT. An extension over a garage is about £29,000–£42,000.
Which other places near Mountain Ash do you cover?
Everywhere around it, including Abercanaid (2.8 miles), Ferndale (3.3 miles) and Treharris (3.4 miles), and the rest of Mid Glamorgan.