Planning application
DM2026/00147
Helena House 348 - 352 High Street Sutton SM1 1PX
Proposal
Retention and completion of part change of use of first-fifth floors to Class C3 (Residential) involving alterations to fenestrations.
As published by the council, reference DM2026/00147
Timeline
Dates from the published record
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5 Feb 2026
Received by Sutton
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12 Feb 2026
Validated
Checked as complete and ready for consideration.
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12 May 2026
Decision issued: Application Granted
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27 Jul 2026
Added to PlanIndex
What a grant of permission means
The process from here
Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.
Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.
About full applications applications
How this application type works
A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.
Nearby applications
Within 500 metres
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DM2025/01390 Awaiting decision
Helena House 348 - 352 High Street Sutton SM1 1PX
Application to vary condition 1 (Approved plans) and condition 2 (Occupation) of planning permission Ref: DM2024/00476 for the 'Prior Approval in relation to the erection of 2 new floors to provide 12 self contained residential units and parking', to allow for alterations to roof stairwell and, front and rear fenestrations.
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DM2023/00393 Granted
Helena House 348 - 352 High Street Sutton SM1 1PX
Erection of single storey rear extension, provision of cycle and refuse stores and alteration to fenestrations.
-
CLC2026/00139 Awaiting decision
Helena House 348 - 352 High Street Sutton SM1 1PX
Application to clear condition 5 (Cycle Store) of approved application DM2026/00506.
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DM2026/00375 Granted
Helena House 348 - 352 High Street Sutton SM1 1PX
Non material amendment to approved application DM2022/01530 which allowed the 'Prior Approval change of use from Class E (Office) to Class C3 (Dwellings) on the second to fifth floors providing 27 self contained units' to change informative 1 (Approved Plans) to a condition.
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DM2026/00506 Granted
Helena House 348 - 352 High Street Sutton SM1 1PX
Application to vary condition 6 of planning permission Ref: DM2022/01530 for the ''Prior Approval change of use from Class E (Office) to Class C3 (Dwellings) on the second to fifth floors providing 27 self contained units.'' to allow for alterations to the fifth floorplan.
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DM2023/01424 Granted
Helena House 348 - 352 High Street Sutton SM1 1PX
Temporary mast with associated cabinet equipment cabinet as illustrated on the enclosed drawings. (NTQ 38652)
Other full applications applications
In Sutton
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DM2026/00451 Granted
454 - 456 London Road North Cheam SM3 8JB
Demolition of the single storey rear extension and garage and erection of a single storey rear extension and garage including installation of rooflights to the extension roof and a step up to the front door of the garage.
-
DM2026/00727 Refused
Ground Floor Flat 110 Carshalton Park Road Carshalton SM5 3SG
Erection of a single storey rear extension and provision of decking. Alterations to the front fenestration.
-
DM2026/00574 Granted
81 Banstead Road Carshalton SM5 3NP
Change of use from Class Ea (Display or retail sale of goods) to Class Eb (Sale of food and drink for consumption on the premises) involving the addition of an extraction flue to the rear.
-
DM2026/00645 Granted
28 Deans Road Sutton SM1 1QP
Erection of infill dormer extensions to the front and rear.
-
DM2026/00649 Granted
St Margarets Catholic Church Fir Tree Grove Carshalton SM5 4NG
Demolition of detached garage and erection of single storey community hall with adjoining roof, access ramp, and alterations to parking and landscaping.