Ground floor rear
Greenwich
· Semi Detached
· 2022
£77k
· Sep '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
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
188,198
The number of applications approved in the last 2 years.
Ground floor rear
Greenwich
· Semi Detached
· 2024
£76k
· 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
188,198
The number of applications approved in the last 2 years.
Ground floor rear
Greenwich
· Semi Detached
· 2025
£91k
· Sep '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
188,198
The number of applications approved in the last 2 years.
Ground floor rear
Greenwich
· Terrace
· 2024
£97k
· Jul '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
188,198
The number of applications approved in the last 2 years.
Ground floor rear
Greenwich
· Terrace
· 2024
£102k
· Sep '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
188,198
The number of applications approved in the last 2 years.
Ground floor rear
Newham
· Terrace
· 2024
£59k
· Apr '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
188,198
The number of applications approved in the last 2 years.
Ground floor rear
Greenwich
· Terrace
· 2023
£82k
· May '23
Ground floor rear
Lewisham
· Semi Detached
· 2023
£97k
· Sep '23
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Lewisham
· Semi Detached
· 2024
£89k
· Sep '24
Ground floor rear
Lewisham
· Semi Detached
· 2025
£57k
· Jan '25
Ground floor rear
Lewisham
· Terrace
· 2025
£92k
· Sep '24
Ground floor rear
Greenwich
· End Of Terrace
· 2023
£65k
· Jun '23
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Southwark
· Detached
· 2022
£91k
· Sep '22
Ground floor rear
Lewisham
· Semi Detached
· 2022
£74k
· Oct '22
Ground floor rear
Lewisham
· Terrace
· 2024
£127k
· Jul '24
Ground floor rear
Tower Hamlets
· Terrace
· 2025
£43k
· Aug '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Bromley
· Terrace
· 2022
£64k
· Nov '22
Ground floor rear
Lewisham
· Terrace
· 2024
£92k
· Jul '24
Ground floor rear
Lewisham
· Terrace
· 2023
£83k
· Aug '23
Ground floor rear
Bromley
· Terrace
· 2023
£81k
· Oct '23
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Bexley
· Detached
· 2023
£89k
· Apr '23
Ground floor rear
Lewisham
· Terrace
· 2022
£79k
· Mar '22
Ground floor rear
Bromley
· Detached
· 2024
£46k
· Aug '24
Ground floor rear
Newham
· Terrace
· 2023
£73k
· Jun '23
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Bexley
· Semi Detached
· 2024
£82k
· Feb '24
Ground floor rear
Southwark
· Terrace
· 2025
£85k
· Sep '23
Ground floor rear
Southwark
· Semi Detached
· 2023
£67k
· Jul '23
Ground floor rear
Barking and Dagenham
· Terrace
· 2025
£117k
· Mar '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Redbridge
· Terrace
· 2023
£81k
· Aug '23
Ground floor rear
Bromley
· Terrace
· 2024
£75k
· Jun '23
Ground floor rear
Waltham Forest
· Terrace
· 2023
£69k
· May '23
Ground floor rear
Bromley
· Semi Detached
· 2024
£154k
· Feb '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Lambeth
· Semi Detached
· 2024
£119k
· Jan '24
Ground floor rear
Southwark
· Terrace
· 2024
£96k
· Nov '23
Ground floor rear
Bromley
· Semi Detached
· 2022
£80k
· Jun '22
Ground floor rear
Bromley
· Terrace
· 2024
£71k
· Mar '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Bromley
· Semi Detached
· 2024
£109k
· May '24
Ground floor rear
Waltham Forest
· Terrace
· 2024
£56k
· May '24
Ground floor rear
Lambeth
· End Of Terrace
· 2024
£95k
· Aug '24
Ground floor rear
Bromley
· Terrace
· 2024
£97k
· May '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Redbridge
· End Of Terrace
· 2023
£69k
· Jul '23
Ground floor rear
Redbridge
· Semi Detached
· 2024
£91k
· Jan '24
Ground floor rear
Bromley
· Semi Detached
· 2022
£91k
· Feb '22
Ground floor rear
Bromley
· Terrace
· 2024
£89k
· Jun '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Lambeth
· Semi Detached
· 2024
£92k
· Feb '24
Ground floor rear
Lambeth
· Terrace
· 2023
£55k
· Oct '23
Ground floor rear
Waltham Forest
· Terrace
· 2022
£72k
· Mar '22
Ground floor rear
Lambeth
· Terrace
· 2022
£70k
· Jul '22
AI images
Images are AI-generated for homeowner privacy
