Two-storey extensions in Helston
From over-garage bedrooms to full wraparounds, we cover every kind of two-storey extension in Helston.
Helston at a glance
- Postcode districts
- TR12 and TR13
- Area
- Cornwall, England
- Price region
- South West England
- Nearest towns
- Camborne (7.7 miles), Redruth (9.2 miles), Falmouth (9.5 miles), Penzance (11.9 miles)
- Distance to Truro
- about 14.7 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.
We cover postcode districts TR12 and TR13 in and around Helston, along with neighbouring Camborne, Redruth and Falmouth.
Extensions available in Helston
Two-storey rear extensions
Helston guide price from £57,500, Standard spec.
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Two-storey side extensions
Guide from £88,500 in Helston, including VAT.
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Two-storey wraparound extensions
Helston guide price from £124,000, Standard spec.
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Part single, part two-storey extensions
Design, approvals and build for Helston homes. Guide from £74,000.
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Extensions over a garage
Design, approvals and build for Helston homes. Guide from £32,500.
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First-floor extensions
Design, approvals and build for Helston homes. Guide from £26,000.
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Two-storey extensions for semi-detached houses
Design, approvals and build for Helston homes. Guide from £57,500.
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Two-storey extensions for detached houses
For homes in Helston: typical guide from £88,500.
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Kitchen extensions with bedrooms above
Design, approvals and build for Helston homes. Guide from £57,500 (before kitchen units).
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Extra bedroom and en-suite extensions
For homes in Helston: typical guide from £57,500 (plus en-suite).
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 Helston we also design annexes, home offices and bedrooms over garages.
Also available in Cornwall
- 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 Helston
Helston 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 Helston
Do you cover Helston?
Yes. We cover Helston (TR12 and TR13) and the surrounding area, including Camborne and Redruth. The first site visit is free.
What does a two-storey extension cost in Helston?
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 Helston do you cover?
Everywhere around it, including Camborne (7.7 miles), Redruth (9.2 miles) and Falmouth (9.5 miles), and the rest of Cornwall.