Ground floor rear
Wealden
· Semi Detached
· 2023
£74k
· Aug '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
59 days
The average number of days taken to approve a project in the last 2 years.
Number approved
136,072
The number of applications approved in the last 2 years.
Ground floor rear
Horsham
· Semi Detached
· 2024
£91k
· Jun '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
59 days
The average number of days taken to approve a project in the last 2 years.
Number approved
136,072
The number of applications approved in the last 2 years.
Ground floor rear
Maidstone
· Semi Detached
· 2024
£66k
· 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
59 days
The average number of days taken to approve a project in the last 2 years.
Number approved
136,072
The number of applications approved in the last 2 years.
Ground floor rear
Ashford
· Detached
· 2024
£206k
· Jun '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
59 days
The average number of days taken to approve a project in the last 2 years.
Number approved
136,072
The number of applications approved in the last 2 years.
Ground floor rear
Reigate and Banstead
· Detached
· 2022
£83k
· May '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
59 days
The average number of days taken to approve a project in the last 2 years.
Number approved
136,072
The number of applications approved in the last 2 years.
Ground floor rear
Reigate and Banstead
· Semi Detached
· 2024
£123k
· 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
59 days
The average number of days taken to approve a project in the last 2 years.
Number approved
136,072
The number of applications approved in the last 2 years.
Ground floor rear
Reigate and Banstead
· Terrace
· 2024
£80k
· Feb '24
Ground floor rear
Medway
· Semi Detached
· 2024
£104k
· Jul '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Reigate and Banstead
· Semi Detached
· 2024
£77k
· May '24
Ground floor rear
Bromley
· Semi Detached
· 2022
£77k
· Jan '22
Ground floor rear
Croydon
· Detached
· 2024
£68k
· Mar '24
Ground floor rear
Croydon
· Terrace
· 2022
£77k
· Jun '22
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Croydon
· End Of Terrace
· 2024
£61k
· May '24
Ground floor rear
Bromley
· Terrace
· 2024
£89k
· Jun '24
Ground floor rear
Croydon
· Semi Detached
· 2024
£97k
· Mar '24
Ground floor rear
Bromley
· Semi Detached
· 2024
£154k
· Feb '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Sutton
· Semi Detached
· 2024
£164k
· Aug '23
Ground floor rear
Bromley
· Terrace
· 2024
£75k
· Jun '23
Ground floor rear
Bromley
· Semi Detached
· 2024
£109k
· May '24
Ground floor rear
Bromley
· Semi Detached
· 2022
£83k
· Jun '22
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Sutton
· Semi Detached
· 2024
£101k
· Apr '24
Ground floor rear
Bromley
· Detached
· 2024
£46k
· Aug '24
Ground floor rear
Bromley
· Terrace
· 2024
£97k
· May '24
Ground floor rear
Bromley
· Terrace
· 2023
£81k
· Oct '23
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Croydon
· Terrace
· 2023
£84k
· Aug '23
Ground floor rear
Sutton
· Semi Detached
· 2025
£61k
· Jan '25
Ground floor rear
Bromley
· Terrace
· 2022
£64k
· Nov '22
Ground floor rear
Epsom and Ewell
· Semi Detached
· 2022
£31k
· Mar '23
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Bexley
· Detached
· 2023
£89k
· Apr '23
Ground floor rear
Bromley
· Semi Detached
· 2022
£91k
· Feb '22
Ground floor rear
Croydon
· End Of Terrace
· 2024
£77k
· Jun '23
Ground floor rear
Bexley
· Semi Detached
· 2024
£82k
· Feb '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Lewisham
· Terrace
· 2024
£92k
· Jul '24
Ground floor rear
Mole Valley
· Semi Detached
· 2024
£74k
· May '24
Ground floor rear
Croydon
· Terrace
· 2023
£54k
· Apr '23
Ground floor rear
Bromley
· Terrace
· 2024
£71k
· Mar '24
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Merton
· Terrace
· 2023
£86k
· Oct '23
Ground floor rear
Epsom and Ewell
· Detached
· 2024
£64k
· Nov '24
Ground floor rear
Lewisham
· Terrace
· 2022
£79k
· Mar '22
Ground floor rear
Epsom and Ewell
· End Of Terrace
· 2022
£49k
· Jul '22
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Epsom and Ewell
· Detached
· 2024
£89k
· May '24
Ground floor rear
Epsom and Ewell
· Terrace
· 2023
£46k
· Jun '23
Ground floor rear
Greenwich
· Terrace
· 2023
£82k
· May '23
Ground floor rear
Lambeth
· Terrace
· 2023
£55k
· Oct '23
AI images
Images are AI-generated for homeowner privacy
Ground floor rear
Lewisham
· Semi Detached
· 2022
£74k
· Oct '22
Ground floor rear
Lewisham
· Semi Detached
· 2025
£57k
· Jan '25
Ground floor rear
Lambeth
· Terrace
· 2022
£70k
· Jul '22
Ground floor rear
Merton
· End Of Terrace
· 2024
£81k
· Apr '24
AI images
Images are AI-generated for homeowner privacy
