Two-storey extensions in Colchester
Need more room in Colchester? Two-storey and first-floor extensions add bedrooms and living space without moving. Here's everything we offer locally.
Colchester at a glance
- Postcode districts
- CO1, CO2, CO3, CO4, CO5 and CO6
- Area
- Essex, England
- Price region
- East of England
- Nearest towns
- Wivenhoe (3.3 miles), Halstead (11.9 miles), Sudbury (Suffolk) (12.7 miles), Clacton-on-Sea (12.8 miles)
- Distance to Southend-on-Sea
- about 25.6 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.
Colchester sits about 25.6 miles from Southend-on-Sea. Closer to home, Wivenhoe is 3.3 miles away and Halstead 11.9 miles.
Extensions available in Colchester
Two-storey rear extensions
Colchester guide price from £57,500, Standard spec.
Learn more
Two-storey side extensions
Guide from £88,500 in Colchester, including VAT.
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
For homes in Colchester: typical guide from £74,000.
Learn more
Extensions over a garage
Guide from £32,500 in Colchester, including VAT.
Learn more
First-floor extensions
Colchester guide price from £26,000, Standard spec.
Learn more
Two-storey extensions for semi-detached houses
From £57,500 in Colchester. Free visit to firm it up.
Learn more
Two-storey extensions for detached houses
Colchester guide price from £88,500, Standard spec.
Learn more
Kitchen extensions with bedrooms above
For homes in Colchester: typical guide from £57,500 (before kitchen units).
Learn more
Extra bedroom and en-suite extensions
For homes in Colchester: typical guide from £57,500 (plus en-suite).
Learn moreWhich type suits your house?
Which type suits your house in Colchester 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 Colchester
Colchester 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 Colchester
Do you cover Colchester?
Yes. We cover Colchester (CO1, CO2, CO3, CO4, CO5 and CO6) and the surrounding area, including Wivenhoe and Halstead. The first site visit is free.
What does a two-storey extension cost in Colchester?
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 Colchester do you cover?
Everywhere around it, including Wivenhoe (3.3 miles), Halstead (11.9 miles) and Sudbury (Suffolk) (12.7 miles), and the rest of Essex.