Two-storey extensions in Baldock
We design, get approval for and build two-storey extensions in Baldock and the surrounding area. Choose the type of extension below or book a free site visit.
Baldock at a glance
- Postcode districts
- SG7
- Area
- Hertfordshire, England
- Price region
- East of England
- Nearest towns
- Letchworth Garden City (1.7 miles), Hitchin (4.9 miles), Henlow (5.1 miles), Stevenage (5.9 miles)
- Distance to Watford
- about 24.6 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.
Baldock sits about 24.6 miles from Watford. Closer to home, Letchworth Garden City is 1.7 miles away and Hitchin 4.9 miles.
Extensions available in Baldock
Two-storey rear extensions
For homes in Baldock: typical guide from £57,500.
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Two-storey side extensions
Baldock guide price from £88,500, Standard spec.
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Two-storey wraparound extensions
Guide from £124,000 in Baldock, including VAT.
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Part single, part two-storey extensions
For homes in Baldock: typical guide from £74,000.
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Extensions over a garage
Baldock guide price from £32,500, Standard spec.
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First-floor extensions
From £26,000 in Baldock. Free visit to firm it up.
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Two-storey extensions for semi-detached houses
Our East of England guide starts at £57,500 for this type.
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Two-storey extensions for detached houses
From £88,500 in Baldock. Free visit to firm it up.
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Kitchen extensions with bedrooms above
Baldock guide price from £57,500 (before kitchen units), Standard spec.
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Extra bedroom and en-suite extensions
Guide from £57,500 (plus en-suite) in Baldock, including VAT.
Learn moreWhich type suits your house?
The boundaries usually decide it. Two-storey work close to a neighbour needs careful design for light and privacy, so at the visit in Baldock we measure distances to every boundary before suggesting a type.
Also available in Hertfordshire
- 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 Baldock
Baldock 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 Baldock
Do you cover Baldock?
Yes. We cover Baldock (SG7) and the surrounding area, including Letchworth Garden City and Hitchin. The first site visit is free.
What does a two-storey extension cost in Baldock?
Using our East of 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 Baldock do you cover?
Everywhere around it, including Letchworth Garden City (1.7 miles), Hitchin (4.9 miles) and Henlow (5.1 miles), and the rest of Hertfordshire.