Two-storey extensions in Frome
From over-garage bedrooms to full wraparounds, we cover every kind of two-storey extension in Frome.
Frome at a glance
- Postcode districts
- BA11
- Area
- Somerset, England
- Price region
- South West England
- Nearest towns
- Westbury (6.2 miles), Warminster (6.4 miles), Trowbridge (8 miles), Midsomer Norton (8.1 miles)
- Distance to Bath
- about 10.3 miles
- Approvals
- Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Side, wraparound and front: planning permission.
Around Frome we also work in Westbury, Warminster and Trowbridge, and across the rest of Somerset. Postcode district in and near Frome: BA11.
Extensions available in Frome
Two-storey rear extensions
For homes in Frome: typical guide from £57,500.
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Two-storey side extensions
Guide from £88,500 in Frome, including VAT.
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Two-storey wraparound extensions
Our South West England guide starts at £124,000 for this type.
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Part single, part two-storey extensions
Our South West England guide starts at £74,000 for this type.
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Extensions over a garage
Design, approvals and build for Frome homes. Guide from £32,500.
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First-floor extensions
Our South West England guide starts at £26,000 for this type.
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Two-storey extensions for semi-detached houses
Guide from £57,500 in Frome, including VAT.
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Two-storey extensions for detached houses
Frome guide price from £88,500, Standard spec.
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Kitchen extensions with bedrooms above
From £57,500 (before kitchen units) in Frome. Free visit to firm it up.
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Extra bedroom and en-suite extensions
Our South West England guide starts at £57,500 (plus en-suite) for this type.
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 Frome we also design annexes, home offices and bedrooms over garages.
Also available in Somerset
- 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 Frome
Frome is in England. Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Side, wraparound and front: planning permission. Householder planning application: £548 (or £575 for applications made from 8 December 2026). Lawful development certificate: £274 (about £288 for applications from 8 December 2026). Councils should decide householder applications within 8 weeks of validation.
The full England rules explained
Questions about extensions in Frome
Do you cover Frome?
Yes. We cover Frome (BA11) and the surrounding area, including Westbury and Warminster. The first site visit is free.
What does a two-storey extension cost in Frome?
Using our South West England 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 £57,500–£78,000 including VAT. An extension over a garage is about £32,500–£47,500.
Which other places near Frome do you cover?
Everywhere around it, including Westbury (6.2 miles), Warminster (6.4 miles) and Trowbridge (8 miles), and the rest of Somerset.