East Wing The Royal Marsden Hospital Downs Road Sutton SM2 5PT Data via plota.co.uk
Proposal
Application to vary condition 1 (approved drawings), 5 (fire safety strategy), 6 (solar PV array details) and 7 (acoustic assessment) of planning permission Ref: for the 'Erection of a part one, part two storey upwards extension from the original single storey building to provide plant rooms/enclosures housing extraction ducts/flues and rooftop ventilation, provision of external access stairs, solar panels to new flat roof and alterations to the existing ground floor internal layout' to allow for reduction to the first floor footprint of the building, altered fire escape plan and route with alterations to external staircases, alterations to number of PV panels and locations of flue enclosures, relocation of chiller plants and installation of acoustic attenuators to chiller units. Data via plota.co.uk
Application progress
Approved on 21 Sept 2026 · Delegated Decision · Last checked 22 Sept 2026
Documents 30
Decision & officer reports 2
Statements & assessments 1
Plans & drawings 17
Application forms 1
Consultation & comments 2
Other documents 7
Associated applications 2
Part of
Conditions 1, 5, 6, 7 varied
- VariationApplication to vary condition 1 (approved drawings), 5 (fire safety strategy), 6 (solar PV…This applicationDM2026/00685
Site constraints 5
Checked on 6 October 2026. Historic England, the Environment Agency, Natural England, the British Geological Survey and UK Health Security Agency (radon, contains BGS materials © UKRI), Transport for London (public transport access levels, Powered by TfL Open Data, OGL v3.0, contains OS data © Crown copyright and database right 2025) and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.
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Important details
Public comments
No public comments yet.
Last counted 22 Sept 2026
Consultation & key dates
- Comments by
- 3 Sept 2026
- Statutory expiry
- 24 Sept 2026
- Env. assessment
- No
Historical activity at this location
25 nearby applications on record - archival context, not part of the live application.
Nearby activity
Sutton is one of the fastest councils in England for householder decisions, ranking #14 out of 296. Only 13% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Householder applications are slightly more likely to be approved here (93%) than the national average (90%).
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East Wing The Royal Marsden Hospital Downs Road Sutton SM2 5PT
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Referenced application
Council archive
The Royal Marsden Hospital Downs Road Sutton SM2 5PT
Erection of a part one, part two storey upwards extension from the original single storey building to provide plant rooms/enclosures housing extraction ducts/flues and rooftop ventilation, provision of external access stairs, solar panels to new flat roof and alterations to the existing ground floor internal layout.
- Received
- 6 Aug 2024
- Decided
- 1 Oct 2024
- Outcome
- Approved