Two-storey extensions in Bishops Stortford
We design, get approval for and build two-storey extensions in Bishops Stortford and the surrounding area. Choose the type of extension below or book a free site visit.
Bishops Stortford at a glance
- Postcode districts
- CM23, SG10 and SG11
- Area
- Hertfordshire, England
- Price region
- East of England
- Nearest towns
- Harlow (6.8 miles), Ware (9 miles), Hoddesdon (10.5 miles), Saffron Walden (11.1 miles)
- Distance to Watford
- about 28 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 Bishops Stortford (CM23, SG10 and SG11) and the places around it, including Harlow (6.8 miles), Ware (9.0 miles) and Hoddesdon.
Extensions available in Bishops Stortford
Two-storey rear extensions
Our East of England guide starts at £57,500 for this type.
Learn more
Two-storey side extensions
From £88,500 in Bishops Stortford. Free visit to firm it up.
Learn more
Two-storey wraparound extensions
Our East of England guide starts at £124,000 for this type.
Learn more
Part single, part two-storey extensions
From £74,000 in Bishops Stortford. Free visit to firm it up.
Learn more
Extensions over a garage
From £32,500 in Bishops Stortford. Free visit to firm it up.
Learn more
First-floor extensions
For homes in Bishops Stortford: typical guide from £26,000.
Learn more
Two-storey extensions for semi-detached houses
Our East of England guide starts at £57,500 for this type.
Learn more
Two-storey extensions for detached houses
For homes in Bishops Stortford: typical guide from £88,500.
Learn more
Kitchen extensions with bedrooms above
For homes in Bishops Stortford: typical guide from £57,500 (before kitchen units).
Learn more
Extra bedroom and en-suite extensions
Guide from £57,500 (plus en-suite) in Bishops Stortford, 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 Bishops Stortford 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 Bishops Stortford
Bishops Stortford 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 Bishops Stortford
Do you cover Bishops Stortford?
Yes. We cover Bishops Stortford (CM23, SG10 and SG11) and the surrounding area, including Harlow and Ware. The first site visit is free.
What does a two-storey extension cost in Bishops Stortford?
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 Bishops Stortford do you cover?
Everywhere around it, including Harlow (6.8 miles), Ware (9 miles) and Hoddesdon (10.5 miles), and the rest of Hertfordshire.