Two-storey extensions in Gelligaer
We design, get approval for and build two-storey extensions in Gelligaer and the surrounding area. Choose the type of extension below or book a free site visit.
Gelligaer at a glance
- Postcode districts
- CF82
- Area
- Gwent, Wales
- Price region
- Wales
- Nearest towns
- Hengoed (1.4 miles), Nelson (Mid Glamorgan) (1.4 miles), Bargoed (1.6 miles), Blackwood (2.1 miles)
- Distance to Newport (Gwent)
- about 12.3 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 Gelligaer we also work in Hengoed, Nelson (Mid Glamorgan) and Bargoed, and across the rest of Gwent. Postcode district in and near Gelligaer: CF82.
Extensions available in Gelligaer

Two-storey rear extensions
For homes in Gelligaer: typical guide from £51,500.
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Two-storey side extensions
Guide from £79,000 in Gelligaer, including VAT.
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Two-storey wraparound extensions
Design, approvals and build for Gelligaer homes. Guide from £111,000.
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Part single, part two-storey extensions
Our Wales guide starts at £66,000 for this type.
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Extensions over a garage
Design, approvals and build for Gelligaer homes. Guide from £29,000.
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First-floor extensions
Design, approvals and build for Gelligaer homes. Guide from £23,000.
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Two-storey extensions for semi-detached houses
Our Wales guide starts at £51,500 for this type.
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Two-storey extensions for detached houses
Design, approvals and build for Gelligaer homes. Guide from £79,000.
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Kitchen extensions with bedrooms above
Our Wales guide starts at £51,500 (before kitchen units) for this type.
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Extra bedroom and en-suite extensions
From £51,500 (plus en-suite) in Gelligaer. Free visit to firm it up.
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 Gelligaer, with a rough idea of the approval route and cost for each.
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 Gelligaer
Gelligaer 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 Gelligaer
Do you cover Gelligaer?
Yes. We cover Gelligaer (CF82) and the surrounding area, including Hengoed and Nelson (Mid Glamorgan). The first site visit is free.
What does a two-storey extension cost in Gelligaer?
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 Gelligaer do you cover?
Everywhere around it, including Hengoed (1.4 miles), Nelson (Mid Glamorgan) (1.4 miles) and Bargoed (1.6 miles), and the rest of Gwent.