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AtlasWestminsterW1B 2LL
Postcode record · Westminster

W1B 2LL.

W1B 2LL has 7 known premises and 14 planning records — 7 approved of 10 decided (70%).

Postcode unitWestminster →Boundary not available
Westminster›W1B 2LL
No OS boundary is held for this postcode yet, so no shape is drawn.
At a glance · this postcodeWestminster profile →
7
Premises
known addresses (UPRNs)
14
Applications
10 decided
70%
Approval rate
7 approved · 3 refused
0
EPC records
none recorded
0
Mapped applications
shape not available
Postcode unit boundary from Ordnance Survey; premises and applications inside it. Aggregates describe the area, not any single premises.
Property

What is it?

W1B 2LL has 7 known premises and 14 planning records — 7 approved of 10 decided (70%).

Premises

Planning

What happened?

14 planning applications across the postcode; 7 approved of 10 decided (70%). Latest 14 shown.

Reference
Proposal · address
Type
Outcome
Date · distance
Details of the pre-demolition audit in accordance with section 4.6 of the GLA's adopted Circular Economy Statement guidance shall be submitted to us and approved by us in writing; pursuant to condition 25(a) of planning permission dated 17th March 2026 (RN 24/06571/FULL)
Mimosa House 12 Princes Street London W1B 2LL · premises record
Advertisement
Unknown
2026-05-11
Excavation to existing lower ground floor level to increase the floor to ceiling height and remove inconsistencies in level across the site; excavation of additional basement level under the footprint of part of the existing site; partial demolition, retrofit and single storey sheer extension to the building fronting Princes Street; infilling and extension to rear to provide a part-6, part-7 storey building above lower ground and new basement level; creation of lightwell along the Princes Street frontage with associated stair and railings; alteration to fa�ade including the installation of new shopfront, windows and altered access arrangement; installation of new plant equipment at basement and roof level with photovoltaics above; provision of a landscaped terrace at third and fifth level; new cycle parking facilities in new part basement level ; and associated works. Use of part lower ground floor and part ground floor for restaurant and/or retail (Class E) purposes with the remainder of the building being used solely for office (Class E) purposes.
Mimosa House 12 Princes Street London W1B 2LL · premises record
Applicant Not disclosed · Agent Gerald Eve LLP · Officer Damian Lavelle
Full Planning Permission Application
Approved
2024-09-20
Display of 2no internally illuminated fascia signs (1no measuring 4.45 m x 0.42 m and 1no 5.47 m 0.43 m), 1no non -illuminated projecting sign measuring 0.6 m x 0.6 m
Mimosa House 12 Princes Street London W1B 2LL · premises record
Advert Application (ADV)
Approved
2016-02-26
Display of two internally illuminated (letters only) fascia signs measuring 4.45m x 0.42m and 0.55m x 0.43m and one internally illuminated (letters only) projecting sign measuring 0.60m x 0.60m.
Mimosa House 12 Princes Street London W1B 2LL · premises record
Advert Application (ADV)
Approved
2015-02-10
Retention of four air conditioning units at roof level.
Mimosa House 12 Princes Street London W1B 2LL · premises record
Applicant Mr Edward Caton · Agent Knight Frank LLP · Officer Kathryn Moran
Full Planning Permission Application
Refused
2011-04-05
Display of non-illuminated estate agent board measuring 600mm x 900mm to be displayed at a height of between 3m and 4.6m from pavement level to the top of the board, for a temporary period of six months.
Mimosa House 12 Princes Street London W1B 2LL · premises record
—
Approved
2009-12-29
Display of non-illuminated estate agent board measuring 600mm x 900mm to be displayed at a height of between 3m and 4.6m from pavement level to the top of the board, for a temporary period of six months.
Mimosa House 12 Princes Street London W1B 2LL · premises record
—
Approved
2009-06-19
Installation of four air-conditioning units at roof level, alterations to front door to incorporate a traditional timber panel door.
Mimosa House 12 Princes Street London W1B 2LL · premises record
Applicant Mr Edward Caton · Agent Knight Frank LLP · Officer Robert Smith
Full Planning Permission Application
Approved
2009-05-08
Display for a temporary period of six months of a non-illuminated 'to let' board located at a height of between 3m x 4.6m above pavement level and measuring 0.6m x 0.9m.
Mimosa House 12 Princes Street London W1B 2LL · premises record
—
Unknown
2008-12-05
Display of an internally illuminated projecting sign
Mimosa House 12 Princes Street London W1B 2LL · premises record
Applicant Not disclosed · Agent Pentangie Design Group · Officer Ken Powell
Advert Application (ADV)
Approved
2008-09-22
Details of the pre-demolition audit in accordance with section 4.6 of the GLA's adopted Circular Economy Statement guidance shall be submitted to us and approved by us in writing; pursuant to condition 25(a) of planning permission dated 17th March 2026 (RN 24/06571/FULL)
Mimosa House 12 Princes Street London W1B 2LL · premises record
Unknown
2026-05-11
More
Advertisement
Excavation to existing lower ground floor level to increase the floor to ceiling height and remove inconsistencies in level across the site; excavation of additional basement level under the footprint of part of the existing site; partial demolition, retrofit and single storey sheer extension to the building fronting Princes Street; infilling and extension to rear to provide a part-6, part-7 storey building above lower ground and new basement level; creation of lightwell along the Princes Street frontage with associated stair and railings; alteration to fa�ade including the installation of new shopfront, windows and altered access arrangement; installation of new plant equipment at basement and roof level with photovoltaics above; provision of a landscaped terrace at third and fifth level; new cycle parking facilities in new part basement level ; and associated works. Use of part lower ground floor and part ground floor for restaurant and/or retail (Class E) purposes with the remainder of the building being used solely for office (Class E) purposes.
Mimosa House 12 Princes Street London W1B 2LL · premises record
Applicant Not disclosed · Agent Gerald Eve LLP · Officer Damian Lavelle
Approved
2024-09-20
More
Full Planning Permission Application
Display of 2no internally illuminated fascia signs (1no measuring 4.45 m x 0.42 m and 1no 5.47 m 0.43 m), 1no non -illuminated projecting sign measuring 0.6 m x 0.6 m
Mimosa House 12 Princes Street London W1B 2LL · premises record
Approved
2016-02-26
More
Advert Application (ADV)
Show all 10 rows
Display of two internally illuminated (letters only) fascia signs measuring 4.45m x 0.42m and 0.55m x 0.43m and one internally illuminated (letters only) projecting sign measuring 0.60m x 0.60m.
Mimosa House 12 Princes Street London W1B 2LL · premises record
Approved
2015-02-10
More
Advert Application (ADV)
Retention of four air conditioning units at roof level.
Mimosa House 12 Princes Street London W1B 2LL · premises record
Applicant Mr Edward Caton · Agent Knight Frank LLP · Officer Kathryn Moran
Refused
2011-04-05
More
Full Planning Permission Application
Display of non-illuminated estate agent board measuring 600mm x 900mm to be displayed at a height of between 3m and 4.6m from pavement level to the top of the board, for a temporary period of six months.
Mimosa House 12 Princes Street London W1B 2LL · premises record
Approved
2009-12-29
More
—
Display of non-illuminated estate agent board measuring 600mm x 900mm to be displayed at a height of between 3m and 4.6m from pavement level to the top of the board, for a temporary period of six months.
Mimosa House 12 Princes Street London W1B 2LL · premises record
Approved
2009-06-19
More
—
Installation of four air-conditioning units at roof level, alterations to front door to incorporate a traditional timber panel door.
Mimosa House 12 Princes Street London W1B 2LL · premises record
Applicant Mr Edward Caton · Agent Knight Frank LLP · Officer Robert Smith
Approved
2009-05-08
More
Full Planning Permission Application
Display for a temporary period of six months of a non-illuminated 'to let' board located at a height of between 3m x 4.6m above pavement level and measuring 0.6m x 0.9m.
Mimosa House 12 Princes Street London W1B 2LL · premises record
Unknown
2008-12-05
More
—
Display of an internally illuminated projecting sign
Mimosa House 12 Princes Street London W1B 2LL · premises record
Applicant Not disclosed · Agent Pentangie Design Group · Officer Ken Powell
Approved
2008-09-22
More
Advert Application (ADV)

Building control

Building-control records are not yet collected for Westminster — the register is being gathered borough by borough (held so far: Lambeth, Brent, Ealing, Westminster, City and others).

Place

What affects it?

Every mapped designation touching a premises in this postcode, with how many of its 7 premises each one covers.

Designation
Coverage
Archaeological Priority Area
City of Westminster APA 2.5: Great Estates Summary and Definition The Great Estates APA covers an area bounded by Park Lane to the west, Green Park and St James’s Park to the south, Haymarket, Shaftesbury Avenue, Charing Cross Road and t · reference 76098 · covers 7 of 7 premises. Groundworks may require archaeological assessment or investigation.
Article 4 Direction Area
Article 4 Basement Development Permitted Rights Removed · reference 23/00006/REG_4 · covers 7 of 7 premises. Some normally permitted changes may require planning permission.
Article 4 Direction Area
Article 4 Direction Class E To C3 In Central Activities Zone · reference 23/00004/REG_4 · covers 7 of 7 premises. Some normally permitted changes may require planning permission.
Central Activities Zone
Named designation not supplied · reference CAZ00000005 · covers 7 of 7 premises. London Plan policies for the Central Activities Zone may apply.
Conservation Area
Mayfair · reference CONARA/1270 · covers 7 of 7 premises. Demolition, alterations, trees and design are subject to additional heritage controls.
Archaeological Priority Area
City of Westminster APA 2.5: Great Estates Summary and Definition The Great Estates APA covers an area bounded by Park Lane to the west, Green Park and St James’s Park to the south, Haymarket, Shaftesbury Avenue, Charing Cross Road and t · reference 76098 · covers 7 of 7 premises. Groundworks may require archaeological assessment or investigation.
Article 4 Direction Area
Article 4 Basement Development Permitted Rights Removed · reference 23/00006/REG_4 · covers 7 of 7 premises. Some normally permitted changes may require planning permission.
Article 4 Direction Area
Article 4 Direction Class E To C3 In Central Activities Zone · reference 23/00004/REG_4 · covers 7 of 7 premises. Some normally permitted changes may require planning permission.
Show all 5 rows
Central Activities Zone
Named designation not supplied · reference CAZ00000005 · covers 7 of 7 premises. London Plan policies for the Central Activities Zone may apply.
Conservation Area
Mayfair · reference CONARA/1270 · covers 7 of 7 premises. Demolition, alterations, trees and design are subject to additional heritage controls.
People

Who is involved?

Named on the latest 14 applications in this postcode — the party who applied, not the owner or occupier.

Name
Details
Applicant on 2 applications
Applicant on 2 applications
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Agent on 2 applications
Agent on 2 applications
Agent on 1 application
Agent on 1 application
Applicant on 2 applications
Applicant on 2 applications
Applicant on 1 application
Show all 10 rows
Applicant on 1 application
Applicant on 1 application
Applicant on 1 application
Agent on 2 applications
Agent on 2 applications
Agent on 1 application
Agent on 1 application
Development

What could it become?

Planning precedent14 applications and 0 mapped decisions in this postcode — precedent for what has been permitted and refused here.
EnergyNo EPC records joined yet.
What is not assertedNo capacity, value or ownership claim is made at area level; those belong to individual premises records and their evidence.

Intent signals

Planning Atlas Pro

Ownership, finance and market signals recorded at addresses in this postcode — each with date and source. Signals are evidence of change, not a prediction.

2 intent signals recorded in this postcode
Ageing director · Company dissolving
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Planning records: canonical stage2. EPC: EPC register. Premises: OS AddressBase / UPRN.
W1B 2LL, Westminster: Planning and Property History | Planning Atlas