Planning application
2011/5439/P
18 TRIAD HOUSE HANWAY STREET LONDON W1T 1UF
Proposal
Erection of roof extension and change of use of part lower ground/ground floor and entire first, second and third floor from offices (Class B1) to residential (Class C3) to provide 3 x 1-bedroom and 2 x studio intermediate units and 1 x 3-bedroom market housing unit.
As published by the council, reference 2011/5439/P
Timeline
Dates from the published record
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28 Dec 2012
Decision issued: Granted Subject to a Section 106 Legal Agreement
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22 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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2013/5250/P Granted
Triad House 18 Hanway Street London W1T 1UF
Details pursuant to condition 6 (green roof) of planning permission dated 28/12/2012 (Ref: 2011/5439/P) for erection of roof extension and change of use of part lower ground/ground floor and entire first, second and third floor from offices (Class B1) to residential (Class C3)
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2013/0627/P Granted
Triad House 18 Hanway Street London W1T 1UF
Details pursant to condition 5 (cycle storage) of planning permission dated 28/12/12 (Ref:2011/5439/P) for the erection of roof extension and change of use of part lower ground/ground floor and entire first, second and third floor from offices (Class B1) to residential (Class C3) to provide 3 x 1-bedroom and 2 x studio intermediate units and 1 x 3-bedroom market housing unit.
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2020/3609/P Granted
18 Hanway Street London W1T 1UF
Replacement of front door and removal of front step.
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2013/5825/P Refused
Triad House 18 Hanway Street London W1T 1UF
Erection of mansard roof extension and change of use of the first, second and third floors from offices (Class B1) to residential (Class C3) to provide 5x1 bedroom flats and 1x3 bed flat.
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2011/2435/P Granted
8/10 Hanway Place London W1T 1HD
Change of use from offices (Class B1) to restaurant use (Class A3) at ground floor level to provide staff facilities in connection with the existing restaurant at 7-12 Hanway Place.
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2019/6184/P Granted
1st Floor Rear 20 Hanway Street London W1T 1UG
External alterations including erection of roof extension with 5 x roof windows and a lightwell, associated with change of use from ancillary A1 space to residential C3 to create a new 2 bed flat.
Other full applications applications
In Camden
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2026/0743/P Granted
34-42 Middlesex House Cleveland Street London W1T 4JE
Details pursuant to Condition 6 (Living Roof) of planning permission 2024/2020/P granted on 12/09/2024 "(Minor refurbishment and rooftop works including: upgraded entrance and reception area; new cycle storage and associated end of trip facilities; new/replaced rooftop plant and plant enclosures; creation of a rooftop amenity area with pavilion structure; hard and soft rooftop landscaping; and all associated and ancillary works)."
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2026/3202/P Awaiting decision
Flat 1 94 Goldhurst Terrace London NW6 3HS
Erection of a single storey rear extension.
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2026/0335/P Granted
216A West End Lane London NW6 1UX
Conversion of 1 x 7 bedroom flat (C3) and 1 x 2 bedroom flat (C3) to 1 x 7 bedroom House in Multiple Occupation (Sui-generis) and 1 x 1 bedroom flat (C3) and installation of four rooflights
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2026/3229/P Awaiting decision
52 Neal Street London WC2H 9PA
Alterations to the shopfront and installation of awnings.
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2026/2160/P Granted
120 College Place London NW1 0DJ
Erection of a rear roof extension, formation of a rear roof terrace and installation of 2x rooflights to front roof slope, and associated works.