Ground floor rear
Castle Point
· Detached
· 2024
£117k
· 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
88%
The average approval rate of projects in the last 2 years.
Time to approval
61 days
The average number of days taken to approve a project in the last 2 years.
Number approved
184,063
The number of applications approved in the last 2 years.
Ground floor rear
Havering
· Semi Detached
· 2024
£125k
· 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
88%
The average approval rate of projects in the last 2 years.
Time to approval
61 days
The average number of days taken to approve a project in the last 2 years.
Number approved
184,063
The number of applications approved in the last 2 years.
Ground floor rear
Chelmsford
· Bungalow
· 2022
£72k
· 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
88%
The average approval rate of projects in the last 2 years.
Time to approval
61 days
The average number of days taken to approve a project in the last 2 years.
Number approved
184,063
The number of applications approved in the last 2 years.
Ground floor rear
Havering
· Terrace
· 2023
£111k
· Oct '22
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
88%
The average approval rate of projects in the last 2 years.
Time to approval
61 days
The average number of days taken to approve a project in the last 2 years.
Number approved
184,063
The number of applications approved in the last 2 years.
Ground floor rear
Southend-on-Sea
· End Of Terrace
· 2024
£80k
· 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
88%
The average approval rate of projects in the last 2 years.
Time to approval
61 days
The average number of days taken to approve a project in the last 2 years.
Number approved
184,063
The number of applications approved in the last 2 years.
Ground floor rear
Redbridge
· Semi Detached
· 2024
£91k
· Jan '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
88%
The average approval rate of projects in the last 2 years.
Time to approval
61 days
The average number of days taken to approve a project in the last 2 years.
Number approved
184,063
The number of applications approved in the last 2 years.
Ground floor rear
Braintree
· Semi Detached
· 2022
£147k
· Apr '22
Ground floor rear
Barking and Dagenham
· Terrace
· 2025
£117k
· Mar '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Epping Forest
· Terrace
· 2023
£78k
· Jul '23
Ground floor rear
Redbridge
· Terrace
· 2024
£88k
· Jul '24
Ground floor rear
Epping Forest
· Terrace
· 2023
£88k
· Mar '23
Ground floor rear
Epping Forest
· Detached
· 2024
£93k
· Aug '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Greenwich
· End Of Terrace
· 2023
£65k
· Jun '23
Ground floor rear
Redbridge
· Terrace
· 2023
£81k
· Aug '23
Ground floor rear
Newham
· Terrace
· 2023
£73k
· Jun '23
Ground floor rear
Redbridge
· End Of Terrace
· 2023
£69k
· Jul '23
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Redbridge
· Semi Detached
· 2025
£89k
· Jan '25
Ground floor rear
Bexley
· Semi Detached
· 2024
£82k
· Feb '24
Ground floor rear
Waltham Forest
· Terrace
· 2024
£56k
· May '24
Ground floor rear
Epping Forest
· Detached
· 2024
£351k
· Jul '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Waltham Forest
· Terrace
· 2024
£72k
· Mar '24
Ground floor rear
Waltham Forest
· Semi Detached
· 2025
£92k
· Dec '24
Ground floor rear
Waltham Forest
· Semi Detached
· 2023
£96k
· Feb '23
Ground floor rear
Waltham Forest
· Terrace
· 2022
£86k
· Feb '22
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Waltham Forest
· Terrace
· 2024
£92k
· May '22
Ground floor rear
Waltham Forest
· Terrace
· 2023
£69k
· May '23
Ground floor rear
Bexley
· Detached
· 2023
£89k
· Apr '23
Ground floor rear
Newham
· Terrace
· 2024
£59k
· Apr '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Greenwich
· Semi Detached
· 2025
£91k
· Sep '24
Ground floor rear
Waltham Forest
· End Of Terrace
· 2024
£104k
· Mar '24
Ground floor rear
Waltham Forest
· Terrace
· 2025
£89k
· Jul '24
Ground floor rear
Waltham Forest
· Terrace
· 2022
£72k
· Mar '22
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Greenwich
· Semi Detached
· 2024
£76k
· Jul '24
Ground floor rear
Waltham Forest
· Terrace
· 2023
£61k
· Sep '23
Ground floor rear
Waltham Forest
· Terrace
· 2024
£83k
· Jan '24
Ground floor rear
Waltham Forest
· Terrace
· 2024
£92k
· Sep '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Waltham Forest
· Terrace
· 2024
£66k
· Jun '24
Ground floor rear
Greenwich
· Terrace
· 2023
£78k
· May '23
Ground floor rear
Greenwich
· Semi Detached
· 2022
£77k
· Sep '22
Ground floor rear
Medway
· Semi Detached
· 2024
£104k
· Jul '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Tower Hamlets
· Terrace
· 2025
£43k
· Aug '24
Ground floor rear
Greenwich
· Terrace
· 2024
£97k
· Jul '22
Ground floor rear
Bromley
· Semi Detached
· 2024
£149k
· Feb '24
Ground floor rear
Bromley
· Terrace
· 2022
£62k
· Nov '22
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Bromley
· Terrace
· 2023
£81k
· Oct '23
Ground floor rear
Greenwich
· Terrace
· 2024
£102k
· Sep '24
Ground floor rear
Enfield
· Semi Detached
· 2023
£32k
· Jun '23
Ground floor rear
Enfield
· Semi Detached
· 2024
£90k
· Dec '23
AI images
Images are AI-generated for homeowner privacy
