Ground floor rear
Medway
· Semi Detached
· 2024
£108k
· 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
Maidstone
· Semi Detached
· 2024
£69k
· Nov '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
Bromley
· Semi Detached
· 2022
£80k
· Jan '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
Bexley
· Semi Detached
· 2024
£85k
· Feb '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
Bromley
· Semi Detached
· 2024
£154k
· Feb '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
Bexley
· Detached
· 2023
£89k
· Apr '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
Greenwich
· End Of Terrace
· 2023
£68k
· Jun '23
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Bromley
· Terrace
· 2024
£92k
· Jun '24
Ground floor rear
Bromley
· Terrace
· 2022
£64k
· Nov '22
Ground floor rear
Bromley
· Terrace
· 2023
£81k
· Oct '23
Ground floor rear
Greenwich
· Semi Detached
· 2025
£95k
· Sep '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Greenwich
· Terrace
· 2023
£82k
· May '23
Ground floor rear
Bromley
· Terrace
· 2024
£78k
· Jun '23
Ground floor rear
Greenwich
· Semi Detached
· 2024
£79k
· Jul '24
Ground floor rear
Bromley
· Detached
· 2024
£48k
· Aug '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Bromley
· Semi Detached
· 2022
£83k
· Jun '22
Ground floor rear
Greenwich
· Terrace
· 2024
£100k
· Jul '22
Ground floor rear
Castle Point
· Detached
· 2024
£122k
· Jul '24
Ground floor rear
Bromley
· Semi Detached
· 2024
£114k
· May '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Lewisham
· Terrace
· 2024
£96k
· Jul '24
Ground floor rear
Greenwich
· Semi Detached
· 2022
£80k
· Sep '22
Ground floor rear
Barking and Dagenham
· Terrace
· 2025
£122k
· Mar '24
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
· 2025
£59k
· Jan '25
Ground floor rear
Lewisham
· Semi Detached
· 2022
£77k
· Oct '22
Ground floor rear
Redbridge
· Semi Detached
· 2024
£94k
· Jan '24
Ground floor rear
Bromley
· Terrace
· 2024
£101k
· May '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Havering
· Terrace
· 2023
£115k
· Oct '22
Ground floor rear
Lewisham
· Terrace
· 2022
£82k
· Mar '22
Ground floor rear
Newham
· Terrace
· 2024
£61k
· Apr '24
Ground floor rear
Lewisham
· Semi Detached
· 2024
£89k
· Sep '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Lewisham
· Terrace
· 2025
£96k
· Sep '24
Ground floor rear
Lewisham
· Terrace
· 2023
£86k
· Aug '23
Ground floor rear
Greenwich
· Terrace
· 2024
£106k
· Sep '24
Ground floor rear
Bromley
· Semi Detached
· 2022
£94k
· Feb '22
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Bromley
· Terrace
· 2024
£74k
· Mar '24
Ground floor rear
Newham
· Terrace
· 2023
£76k
· Jun '23
Ground floor rear
Croydon
· Terrace
· 2023
£84k
· Aug '23
Ground floor rear
Lewisham
· Terrace
· 2024
£132k
· Jul '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Croydon
· End Of Terrace
· 2024
£80k
· Jun '23
Ground floor rear
Redbridge
· Terrace
· 2024
£91k
· Jul '24
Ground floor rear
Redbridge
· Terrace
· 2023
£85k
· Aug '23
Ground floor rear
Southend-on-Sea
· End Of Terrace
· 2024
£84k
· May '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Southwark
· Detached
· 2022
£95k
· Sep '22
Ground floor rear
Croydon
· Semi Detached
· 2024
£101k
· Mar '24
Ground floor rear
Tower Hamlets
· Terrace
· 2025
£45k
· Aug '24
Ground floor rear
Lambeth
· Terrace
· 2023
£55k
· Oct '23
AI images
Images are AI-generated for homeowner privacy
