27 Chiltern Street London W1U 7PJ Data via plota.co.uk
Proposal
Installation of three external air-conditioning condenser units within the two existing rear courtyards/lightwells at ground-floor level. Two condenser units will be located within the left-hand courtyard and enclosed within a purpose-built acoustic enclosure, while one condenser unit will be located within the right-hand courtyard and screened by a multi-panel acoustic screen. The proposed acoustic mitigation measures are intended to minimise operational noise and reduce the impact on neighbouring residential properties. The installation will include the necessary associated works to support the operation of the condenser units. No change of use is proposed as part of this application. Data via plota.co.uk
Application progress
Under consideration
No decision has been issued yet. Plota predicts a decision between 7 Dec 2026 and 17 Dec 2026, from Westminster's recent utility and infrastructure works.
Documents 12
Statements & assessments 2
Plans & drawings 5
Application forms 1
Site constraints 9
Show all 17 with distances
- 28 m28A, MANCHESTER STREET W1 (See details for further address information)Grade II
- 40 m53-55, Dorset Street W1Grade II
- 49 mFire StationGrade II
- 53 mBarley MowGrade II
- 58 m2 and 3, Dorset Street W1Grade II
- 64 m18-27, Manchester Street W1Grade II
- 97 m50-54, Blandford Street W1Grade II
- 102 m48, Blandford Street W1Grade II
- 105 m46, Blandford Street W1Grade II
- 123 m61 and 63, Blandford Street W1Grade II
- 125 m65, Blandford Street W1Grade II
- 127 m67, BLANDFORD STREET (See details for further address information)Grade II
- 128 m47A, MANCHESTER STREET W1 (See details for further address information)Grade II
- 132 m34, Baker Street W1Grade II
- 134 mFitzpatrick Family Mausoleum on East Side of the Southern Half of Public GardensGrade II
- 135 m47 and 48, Manchester Street W1Grade II
- 149 m49 and 50, Manchester Street W1Grade II
Checked on 19 October 2026. Historic England, the Environment Agency, Natural England, the Planning Inspectorate, 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
- Council
- Westminster
- Application type
- Full Planning Permission Application
- Postcode
- W1U 7PJ
- Received
- 15 Oct 2026
- Validated
- 15 Oct 2026
- Ward
- Marylebone
- Case officer
- Show
- Target decision
- 10 Dec 2026
- Applicant
- Show
- Agent
- Parallel Projects
Decision outlook
Day 5 of the 56-day target. Westminster usually decides utility and infrastructure works by day 57.
Plota live figures for utility and infrastructure works decided by Westminster in the last twelve months, from validation. Westminster decision record →
Public comments
No public comments yet.
Last counted 19 Oct 2026
Consultation & key dates
- Alt. reference
- PP-15165556
- Planning Portal ref
- PP-15165556
- Env. assessment
- No
Westminster is slower than most councils at deciding householder applications, ranking #258 out of 296. Only 28% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Westminster is also one of the strictest councils - it refuses more householder applications than almost any other, with only 81% approved vs 90% nationally.
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27 Chiltern Street London W1U 7PJ
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