Two-storey extensions in Longfield
Homeowners in Longfield can use us for the whole project or just the drawings and approvals. Start with a free visit.
Longfield at a glance
- Postcode districts
- DA3
- Area
- Kent, England
- Price region
- South East England
- Nearest towns
- Hartley (0.7 miles), Swanscombe (3.5 miles), Gravesend (4.3 miles), Dartford (5.1 miles)
- Distance to Maidstone
- about 12.9 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 Longfield (DA3) and the places around it, including Hartley (0.7 miles), Swanscombe (3.5 miles) and Gravesend.
Extensions available in Longfield
Two-storey rear extensions
For homes in Longfield: typical guide from £61,500.
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Two-storey side extensions
From £94,500 in Longfield. Free visit to firm it up.
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Two-storey wraparound extensions
From £132,500 in Longfield. Free visit to firm it up.
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Part single, part two-storey extensions
From £79,000 in Longfield. Free visit to firm it up.
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Extensions over a garage
For homes in Longfield: typical guide from £34,500.
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First-floor extensions
From £27,500 in Longfield. Free visit to firm it up.
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Two-storey extensions for semi-detached houses
For homes in Longfield: typical guide from £61,500.
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Two-storey extensions for detached houses
Longfield guide price from £94,500, Standard spec.
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Kitchen extensions with bedrooms above
Design, approvals and build for Longfield homes. Guide from £61,500 (before kitchen units).
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Extra bedroom and en-suite extensions
Design, approvals and build for Longfield homes. Guide from £61,500 (plus en-suite).
Learn moreWhich type suits your house?
Which type suits your house in Longfield depends mostly on where you have room. A deep garden points to a rear extension; space beside the house points to a side or over-garage extension; a house that already has a single-storey extension can often take a first floor on top.
Also available in Kent
- 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 Longfield
Longfield 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 Longfield
Do you cover Longfield?
Yes. We cover Longfield (DA3) and the surrounding area, including Hartley and Swanscombe. The first site visit is free.
What does a two-storey extension cost in Longfield?
Using our South East 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 £61,500–£83,000 including VAT. An extension over a garage is about £34,500–£50,500.
Which other places near Longfield do you cover?
Everywhere around it, including Hartley (0.7 miles), Swanscombe (3.5 miles) and Gravesend (4.3 miles), and the rest of Kent.