Two-storey extensions in Abercynon
From over-garage bedrooms to full wraparounds, we cover every kind of two-storey extension in Abercynon.
Abercynon at a glance
- Postcode districts
- CF46
- Area
- Mid Glamorgan, Wales
- Price region
- Wales
- Nearest towns
- Treharris (1.6 miles), Nelson (Mid Glamorgan) (1.9 miles), Pontypridd (3.1 miles), Gelligaer (3.3 miles)
- Distance to Rhondda
- about 5.3 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 Abercynon we also work in Treharris, Nelson (Mid Glamorgan) and Pontypridd, and across the rest of Mid Glamorgan. Postcode district in and near Abercynon: CF46.
Extensions available in Abercynon

Two-storey rear extensions
For homes in Abercynon: typical guide from £51,500.
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Two-storey side extensions
Guide from £79,000 in Abercynon, including VAT.
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Two-storey wraparound extensions
Guide from £111,000 in Abercynon, including VAT.
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Part single, part two-storey extensions
Guide from £66,000 in Abercynon, including VAT.
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Extensions over a garage
From £29,000 in Abercynon. Free visit to firm it up.
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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
Abercynon guide price from £51,500, Standard spec.
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Two-storey extensions for detached houses
From £79,000 in Abercynon. Free visit to firm it up.
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Kitchen extensions with bedrooms above
Design, approvals and build for Abercynon homes. Guide from £51,500 (before kitchen units).
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Extra bedroom and en-suite extensions
For homes in Abercynon: typical guide from £51,500 (plus en-suite).
Learn moreWhich type suits your house?
If you're not sure which type fits, that's what the free visit is for. We'll sketch the realistic options for your house in Abercynon, with a rough idea of the approval route and cost for each.
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 Abercynon
Abercynon 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 Abercynon
Do you cover Abercynon?
Yes. We cover Abercynon (CF46) and the surrounding area, including Treharris and Nelson (Mid Glamorgan). The first site visit is free.
What does a two-storey extension cost in Abercynon?
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 Abercynon do you cover?
Everywhere around it, including Treharris (1.6 miles), Nelson (Mid Glamorgan) (1.9 miles) and Pontypridd (3.1 miles), and the rest of Mid Glamorgan.