East Wing The Royal Marsden Hospital Downs Road Sutton SM2 5PT Data via plota.co.uk

DM2026/00685 - Section 73 Pending Consideration

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: DM2024/01127 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

View original council record ↗

Application progress

Received
4 Jun 2026
Validated
30 Jul 2026
Decision
Awaiting decision

This application is under consideration - no decision has been issued yet.

Documents 24

All documents on the council site ↗

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Important details

Council
Sutton
Application type
Section 73
Postcode
SM2 5PT
Received
4 Jun 2026
Validated
30 Jul 2026
Ward
Belmont
Applicant
Show
Agent
Ansell & Bailey Architects Ltd

Public comments

No public comments yet.

Last counted 19 Aug 2026

Read the comments on the council site ↗

Consultation & key dates

Env. assessment
No
Sutton
Planning Authority Score
8.2/10
Excellent
#23 of 296 councils
Relevant to this application:
Householder decisions

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%).

Among the fastest councils in England
for householder decisions
These figures are council-wide context, not a prediction for this application. View full council performance
Sutton decision performance
Based on MHCLG data, the year to March 2026
90%
Overall approval rate
Above avg (87%) #118 of 296
93%
Householder approved
Above avg (90%) #138 of 296
91%
Decided in 8 weeks
Above avg (63%) #14 of 296
13%
Extended time limit
Below avg (41%) #8 of 296
71%
Minor dwellings approved
85 decided (1-9 homes)
89%
Major dwellings approved
9 decided (10+ homes)
81%
Change of use approved
26 decided
891
Total decisions
93 refused in the year to March 2026