Two-storey extensions in Harlow
From over-garage bedrooms to full wraparounds, we cover every kind of two-storey extension in Harlow.
Harlow at a glance
- Postcode districts
- CM17, CM18, CM19 and CM20
- Area
- Essex, England
- Price region
- East of England
- Nearest towns
- Hoddesdon (5.4 miles), Epping (5.4 miles), Broxbourne (6 miles), Ware (6.4 miles)
- Distance to Southend-on-Sea
- about 30.7 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.
Harlow sits about 30.7 miles from Southend-on-Sea. Closer to home, Hoddesdon is 5.4 miles away and Epping 5.4 miles.
Extensions available in Harlow
Two-storey rear extensions
Our East of England guide starts at £57,500 for this type.
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Two-storey side extensions
Design, approvals and build for Harlow homes. Guide from £88,500.
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Two-storey wraparound extensions
From £124,000 in Harlow. Free visit to firm it up.
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Part single, part two-storey extensions
From £74,000 in Harlow. Free visit to firm it up.
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Extensions over a garage
From £32,500 in Harlow. Free visit to firm it up.
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First-floor extensions
Guide from £26,000 in Harlow, including VAT.
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Two-storey extensions for semi-detached houses
Guide from £57,500 in Harlow, including VAT.
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Two-storey extensions for detached houses
Guide from £88,500 in Harlow, including VAT.
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Kitchen extensions with bedrooms above
Guide from £57,500 (before kitchen units) in Harlow, including VAT.
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Extra bedroom and en-suite extensions
Harlow guide price from £57,500 (plus en-suite), Standard spec.
Learn moreWhich type suits your house?
Which type suits your house in Harlow 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 Essex
- 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 Harlow
Harlow 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 Harlow
Do you cover Harlow?
Yes. We cover Harlow (CM17, CM18, CM19 and CM20) and the surrounding area, including Hoddesdon and Epping. The first site visit is free.
What does a two-storey extension cost in Harlow?
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 Harlow do you cover?
Everywhere around it, including Hoddesdon (5.4 miles), Epping (5.4 miles) and Broxbourne (6 miles), and the rest of Essex.