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Permitted25/P2164Submitted over a year agoLoft conversion

Cannon Hill Lane Merton SW20 9DB

Demolition of an existing single storey rear extension. Construction of a new full width single storey rear extension. Loft conversion including a hip to gable roof extension, the construction of a new roof dormer to the rear elevation and the addition of 4No Velux windows to the front elevation of the roof. Enlargement of 1No Ground Floor side facing window. Addition of external wall insulation to the side and rear elevations. Removal of two chimneys and adaptation of another. Internal alterations to improve layout.

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Map of the site

Progress

Submitted
21 Jul 2025
— completed
Validated
21 Jul 2025
— completed
Consultation
5 Sept 2025
— completed
Target date
10 Oct 2025
— completed
Decided
8 Oct 2025
— completed

Application details

Reference
25/P2164
Local authority
Merton
Postcode
SW20 9DB
Ward
Cannon Hill
Application type
Householder
Property type
House

Key dates

Submitted
21 Jul 2025
Validated
21 Jul 2025
Comments close
5 Sept 2025
Target decision
10 Oct 2025
Decided
8 Oct 2025

Estimated project value

£75k–£155k

Based on the 46.3m² of floor area stated in the application, at inner London rates (2026). Source: Checkatrade 2026, loft conversion £1,200-£2,500/m².

Floor area gained: 46.3

Recently sold nearby

Inside the two years most owners do their major work — kitchens, bathrooms, rewires and lofts. 2 recent sales are listed below.

Homes here go for about £800,000 — the median of the last 7 market sales in SW20 9DB, £700,000 to £985,000.

Contains HM Land Registry data © Crown copyright and database right 2024. 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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