Two-storey extensions in Llanidloes
Planning a bigger home in Llanidloes? Compare extension types and guide prices below, then book a free site visit.
Llanidloes at a glance
- Postcode districts
- SY17, SY18 and SY19
- Area
- Powys, Wales
- Price region
- Wales
- Nearest towns
- Newtown (11.1 miles), Llandrindod Wells (15.9 miles), Builth Wells (21.5 miles), Welshpool (22 miles)
- Distance to Newtown
- about 11.1 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 Llanidloes we also work in Newtown, Llandrindod Wells and Builth Wells, and across the rest of Powys. Postcode districts in and near Llanidloes: SY17, SY18 and SY19.
Extensions available in Llanidloes

Two-storey rear extensions
For homes in Llanidloes: typical guide from £51,500.
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Two-storey side extensions
Guide from £79,000 in Llanidloes, including VAT.
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Two-storey wraparound extensions
For homes in Llanidloes: typical guide from £111,000.
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Part single, part two-storey extensions
Llanidloes guide price from £66,000, Standard spec.
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Extensions over a garage
Design, approvals and build for Llanidloes homes. 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
Llanidloes guide price from £51,500, Standard spec.
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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
Llanidloes guide price from £51,500 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
Design, approvals and build for Llanidloes homes. Guide from £51,500 (plus en-suite).
Learn moreWhich type suits your house?
Rear and side extensions suit most semi-detached and detached houses with room around them. Terraced and town-centre homes can take a two-storey extension too, with more care over neighbours, light and access.
Also available in Powys
- 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 Llanidloes
Llanidloes 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 Llanidloes
Do you cover Llanidloes?
Yes. We cover Llanidloes (SY17, SY18 and SY19) and the surrounding area, including Newtown and Llandrindod Wells. The first site visit is free.
What does a two-storey extension cost in Llanidloes?
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 Llanidloes do you cover?
Everywhere around it, including Newtown (11.1 miles), Llandrindod Wells (15.9 miles) and Builth Wells (21.5 miles), and the rest of Powys.