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Permitted24/P2425Submitted over a year agoAnnexe

122 Cannon Hill Lane Merton SW20 9ET

ERECTION OF A SINGLE STOREY OUTBUILDING WITH PATIO IN THE REAR GARDEN FOR USE AS A GRANNY ANNEXE.

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Progress

Submitted
25 Sept 2024
— completed
Validated
25 Sept 2024
— completed
Consultation
31 Oct 2024
— completed
Target date
31 Jan 2025
— completed
Decided
24 Jan 2025
— completed

Application details

Reference
24/P2425
Local authority
Merton
Postcode
SW20 9ET
Ward
Cannon Hill
Application type
Householder
Property type
House

Key dates

Submitted
25 Sept 2024
Validated
25 Sept 2024
Comments close
31 Oct 2024
Target decision
31 Jan 2025
Decided
24 Jan 2025

Estimated project value

£69k–£115k

Based on the 28.3m² of floor area stated in the application, at inner London rates (2026). Source: trade estimate, annexe £1,800-£3,000/m².

Floor area gained: 28.3

Recently sold nearby

Inside the two years most owners do their major work — kitchens, bathrooms, rewires and lofts. 3 recent sales are listed below.

Homes here go for about £599,250 — the median of the last 4 market sales in SW20 9ET, £350,000 to £775,000.

Contains HM Land Registry data © Crown copyright and database right 2025. This data is licensed under the Open Government Licence v3.0. Sales are matched by postcode, not by property, so a sale listed here may be a neighbouring address. England and Wales only.

Planning constraints

No designations recorded at this location. This is not a formal search — always confirm with the local authority before relying on it.

Designations from planning.data.gov.uk, Open Government Licence v3.0. Indicative only — not a formal local authority search.

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