Two-storey extensions in Crumlin (Gwent)
From over-garage bedrooms to full wraparounds, we cover every kind of two-storey extension in Crumlin (Gwent).
Crumlin (Gwent) at a glance
- Postcode districts
- NP11
- Area
- Gwent, Wales
- Price region
- Wales
- Nearest towns
- Newbridge (0.8 miles), Abercarn (2.1 miles), Blackwood (3.2 miles), Abertillery (3.6 miles)
- Distance to Newport (Gwent)
- about 8.6 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.
We cover Crumlin (Gwent) (NP11) and the places around it, including Newbridge (0.8 miles), Abercarn (2.1 miles) and Blackwood.
Extensions available in Crumlin (Gwent)

Two-storey rear extensions
Crumlin (Gwent) guide price from £51,500, Standard spec.
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Two-storey side extensions
Design, approvals and build for Crumlin (Gwent) homes. Guide from £79,000.
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Two-storey wraparound extensions
Crumlin (Gwent) guide price from £111,000, Standard spec.
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Part single, part two-storey extensions
From £66,000 in Crumlin (Gwent). Free visit to firm it up.
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Extensions over a garage
From £29,000 in Crumlin (Gwent). Free visit to firm it up.
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First-floor extensions
For homes in Crumlin (Gwent): typical guide from £23,000.
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Two-storey extensions for semi-detached houses
Crumlin (Gwent) guide price from £51,500, Standard spec.
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Two-storey extensions for detached houses
From £79,000 in Crumlin (Gwent). Free visit to firm it up.
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Kitchen extensions with bedrooms above
Crumlin (Gwent) guide price from £51,500 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
Guide from £51,500 (plus en-suite) in Crumlin (Gwent), including VAT.
Learn moreWhich type suits your house?
Which type suits your house in Crumlin (Gwent) depends mostly on where you have room. A deep garden points to a rear extension; space beside the house points to a side or over-garage extension; a house that already has a single-storey extension can often take a first floor on top.
Also available in Gwent
- 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 Crumlin (Gwent)
Crumlin (Gwent) 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 Crumlin (Gwent)
Do you cover Crumlin (Gwent)?
Yes. We cover Crumlin (Gwent) (NP11) and the surrounding area, including Newbridge and Abercarn. The first site visit is free.
What does a two-storey extension cost in Crumlin (Gwent)?
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 Crumlin (Gwent) do you cover?
Everywhere around it, including Newbridge (0.8 miles), Abercarn (2.1 miles) and Blackwood (3.2 miles), and the rest of Gwent.