Ground floor rear
Braintree
· Semi Detached
· 2022
£152k
· Apr '22
Average build cost for a ground floor rear extension is £80k - £100k
Build cost
£80k - £100k
The average cost of a project in the last 2 years.
Value-add
7-9%
The average value uplift of a project in the last 2 years.
Project length
8-9 months
The average time taken to complete a project in the last 2 years.
Planning approval
91%
The average approval rate of projects in the last 2 years.
Time to approval
57 days
The average number of days taken to approve a project in the last 2 years.
Number approved
88,468
The number of applications approved in the last 2 years.
Ground floor rear
Chelmsford
· Bungalow
· 2022
£75k
· Oct '23
Average build cost for a ground floor rear extension is £80k - £100k
Build cost
£80k - £100k
The average cost of a project in the last 2 years.
Value-add
7-9%
The average value uplift of a project in the last 2 years.
Project length
8-9 months
The average time taken to complete a project in the last 2 years.
Planning approval
91%
The average approval rate of projects in the last 2 years.
Time to approval
57 days
The average number of days taken to approve a project in the last 2 years.
Number approved
88,468
The number of applications approved in the last 2 years.
Ground floor rear
Southend-on-Sea
· End Of Terrace
· 2024
£84k
· May '24
Average build cost for a ground floor rear extension is £80k - £100k
Build cost
£80k - £100k
The average cost of a project in the last 2 years.
Value-add
7-9%
The average value uplift of a project in the last 2 years.
Project length
8-9 months
The average time taken to complete a project in the last 2 years.
Planning approval
91%
The average approval rate of projects in the last 2 years.
Time to approval
57 days
The average number of days taken to approve a project in the last 2 years.
Number approved
88,468
The number of applications approved in the last 2 years.
Ground floor rear
Cambridge
· Semi Detached
· 2024
£147k
· Sep '24
AI images
Images are AI-generated for homeowner privacy
Average build cost for a ground floor rear extension is £80k - £100k
Build cost
£80k - £100k
The average cost of a project in the last 2 years.
Value-add
7-9%
The average value uplift of a project in the last 2 years.
Project length
8-9 months
The average time taken to complete a project in the last 2 years.
Planning approval
91%
The average approval rate of projects in the last 2 years.
Time to approval
57 days
The average number of days taken to approve a project in the last 2 years.
Number approved
88,468
The number of applications approved in the last 2 years.
Ground floor rear
Castle Point
· Detached
· 2024
£122k
· Jul '24
Average build cost for a ground floor rear extension is £80k - £100k
Build cost
£80k - £100k
The average cost of a project in the last 2 years.
Value-add
7-9%
The average value uplift of a project in the last 2 years.
Project length
8-9 months
The average time taken to complete a project in the last 2 years.
Planning approval
91%
The average approval rate of projects in the last 2 years.
Time to approval
57 days
The average number of days taken to approve a project in the last 2 years.
Number approved
88,468
The number of applications approved in the last 2 years.
Ground floor rear
Epping Forest
· Terrace
· 2023
£81k
· Jul '23
Average build cost for a ground floor rear extension is £80k - £100k
Build cost
£80k - £100k
The average cost of a project in the last 2 years.
Value-add
7-9%
The average value uplift of a project in the last 2 years.
Project length
8-9 months
The average time taken to complete a project in the last 2 years.
Planning approval
91%
The average approval rate of projects in the last 2 years.
Time to approval
57 days
The average number of days taken to approve a project in the last 2 years.
Number approved
88,468
The number of applications approved in the last 2 years.
Ground floor rear
Havering
· Semi Detached
· 2024
£130k
· May '24
Ground floor rear
Epping Forest
· Terrace
· 2023
£92k
· Mar '23
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Epping Forest
· Detached
· 2024
£93k
· Aug '24
Ground floor rear
East Hertfordshire
· Detached
· 2024
£92k
· Nov '23
Ground floor rear
Havering
· Terrace
· 2023
£115k
· Oct '22
Ground floor rear
East Hertfordshire
· Terrace
· 2025
£74k
· Jun '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Redbridge
· Terrace
· 2024
£91k
· Jul '24
Ground floor rear
Epping Forest
· Detached
· 2024
£365k
· Jul '24
Ground floor rear
Redbridge
· Semi Detached
· 2024
£94k
· Jan '24
Ground floor rear
Redbridge
· Semi Detached
· 2025
£93k
· Jan '25
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Barking and Dagenham
· Terrace
· 2025
£122k
· Mar '24
Ground floor rear
Waltham Forest
· Semi Detached
· 2023
£100k
· Feb '23
Ground floor rear
Waltham Forest
· Terrace
· 2024
£75k
· Mar '24
Ground floor rear
Waltham Forest
· Terrace
· 2022
£90k
· Feb '22
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Waltham Forest
· End Of Terrace
· 2024
£108k
· Mar '24
Ground floor rear
Waltham Forest
· Terrace
· 2026
£98k
· Jun '26
Ground floor rear
Redbridge
· End Of Terrace
· 2023
£69k
· Jul '23
Ground floor rear
North Hertfordshire
· End Of Terrace
· 2024
£94k
· Dec '23
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Enfield
· Semi Detached
· 2023
£33k
· Jun '23
Ground floor rear
Waltham Forest
· Terrace
· 2024
£96k
· May '22
Ground floor rear
Redbridge
· Terrace
· 2023
£85k
· Aug '23
Ground floor rear
Waltham Forest
· Terrace
· 2023
£64k
· Sep '23
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Waltham Forest
· Semi Detached
· 2025
£95k
· Dec '24
Ground floor rear
Newham
· Terrace
· 2023
£76k
· Jun '23
Ground floor rear
Medway
· Semi Detached
· 2024
£108k
· Jul '24
Ground floor rear
Waltham Forest
· Terrace
· 2024
£59k
· May '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Waltham Forest
· Terrace
· 2024
£96k
· Sep '24
Ground floor rear
Waltham Forest
· Terrace
· 2024
£69k
· Jun '24
Ground floor rear
Enfield
· Semi Detached
· 2024
£94k
· Dec '23
Ground floor rear
Waltham Forest
· Terrace
· 2024
£86k
· Jan '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Waltham Forest
· Terrace
· 2022
£75k
· Mar '22
Ground floor rear
Waltham Forest
· Terrace
· 2023
£72k
· May '23
Ground floor rear
Greenwich
· End Of Terrace
· 2023
£68k
· Jun '23
Ground floor rear
Enfield
· Terrace
· 2023
£85k
· Jan '23
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Haringey
· Terrace
· 2024
£78k
· Jul '22
Ground floor rear
Newham
· Terrace
· 2024
£61k
· Apr '24
Ground floor rear
Enfield
· Terrace
· 2022
£94k
· Apr '26
Ground floor rear
Bexley
· Semi Detached
· 2024
£85k
· Feb '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Tower Hamlets
· Terrace
· 2025
£45k
· Aug '24
Ground floor rear
Greenwich
· Semi Detached
· 2025
£95k
· Sep '24
Ground floor rear
Bexley
· Detached
· 2023
£89k
· Apr '23
Ground floor rear
Greenwich
· Semi Detached
· 2024
£79k
· Jul '24
AI images
Images are AI-generated for homeowner privacy
