Planning application
St Mary Abchurch House 123 - 127 Cannon Street London EC4N 5AU
Works: Windows or glazing
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Installation of internal secondary glazing to the existing windows at first to fifth-floor levels
As published by the council, reference 26/01212/LBC
Application record
- Reference
- 26/01212/LBC
- Category
- Heritage and listed buildings
- Status
- Under Consideration
- Received
- 26 Aug 2026
- Validated
- 26 Aug 2026
- Postcode
- EC4N 5AU
Site history
Applications at this address on the City of London register
This site has had 9 applications since 2022: 4 approved, 0 refused.
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26/01134/NMA Awaiting decision
St Mary Abchurch House 123 - 127 Cannon Street London EC4N 5AU
Non-material amendment under Section 96A of the Town and Country Planning Act 1990 (as amended) to planning permission 24/00995/FULL dated 23 December 2024 to: (i) revise the ground floor entrance arrangement, maintenance requirements, ventilation louvres and (ii) revise the sixth floor layout to include staff WC, increase the plant area, amend fire escape access.
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26/00109/NMA Awaiting decision
St Mary Abchurch House 123 - 127 Cannon Street London EC4N 5AU
Non material amendments under section 96A of the Town and Country Planning Act 1990 (as amended) to planning permission ref 24/00995/FULL (dated 12/09/2024), to: (i) accommodate a revised smoke vent.
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26/00024/ADVT Awaiting decision
St Mary Abchurch House 123 - 127 Cannon Street London EC4N 5AU
Installation and display of externally illuminated banner advertising on temporary hoarding, including: (i) one PVC banner measuring 700mm x 1075mm at a height of 3.5m on the southern elevation, (ii) one PVC banner measuring 700mm x 3000mm at a height of 3.5m on the southern elevation, (iii) two PVC banners measuring 700mm x 3000mm at a height of 3.5m on the southern elevation, (iv) two PVC banners measuring 650mm x 1380mm at a height of 5.7m, on the eastern and western elevations (v) two PVC banners measuring 700mm x 2200mm at a height of 4.3m on the eastern elevation (Abchurch Yard).
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25/01703/LBC Awaiting decision
St Mary Abchurch House 123 - 127 Cannon Street London EC4N 5AU
Amendment to the ground floor Cannon Street elevation to accommodate a revised smoke vent; Spatial reconfiguration of the ground floor lobby including installation of a dropped ceiling
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24/00995/FULL Granted
St Mary Abchurch House 123 - 127 Cannon Street London EC4N 5AU
The conversion of the existing commercial accommodation (Class E) at first to fifth floors into 30 x serviced apartments (Class C1), internal alterations associated with the change of use, the creation a new lobby space with waste and bicycle storage space at ground floor level, installation of a partition to the rear of the ground floor commercial (Class E) unit (retrospective consent), installation of mechanical plant and machinery at ground to the rear of the ground floor commercial (Class E) unit with access from a new door to Abchurch Yard, alterations to the existing ground floor entrance door, alterations at roof level including the provision of replacement plant and machinery, and other associated works.
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24/00996/LBC Granted
St Mary Abchurch House 123 - 127 Cannon Street London EC4N 5AU
The conversion of the existing commercial accommodation (Class E) at first to fifth floors into 30 x serviced apartments (Class C1), internal alterations associated with the change of use, the creation a new lobby space with waste and bicycle storage space at ground floor level, installation of a partition to the rear of the ground floor commercial (Class E) unit (retrospective consent), installation of mechanical plant and machinery at ground to the rear of the ground floor commercial (Class E) unit with access from a new door to Abchurch Yard, alterations to the existing ground floor entrance door, alterations at roof level including the provision of replacement plant and machinery, and other associated works.
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22/01031/LBC Granted
St Mary Abchurch House 123 - 127 Cannon Street London EC4N 5AU
The conversion of the existing commercial accommodation (Class E) at first to fifth floors into 20 x serviced apartments (Class C1), internal alterations associated with the change of use, the creation a new lobby space with waste and bicycle storage space at ground floor level, alterations to the existing ground floor entrance door, alterations at roof level including the provision of replacement plant and machinery and a single storey lounge area with associated terrace space, and other associated works.
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22/01030/FULL Granted
St Mary Abchurch House 123 - 127 Cannon Street London EC4N 5AU
The conversion of the existing commercial accommodation (Class E) at first to fifth floors into 20 x serviced apartments (Class C1), internal alterations associated with the change of use, the creation a new lobby space with waste and bicycle storage space at ground floor level, alterations to the existing ground floor entrance door, alterations at roof level including the provision of replacement plant and machinery and a single storey lounge area with associated terrace space, and other associated works.
Timeline
Dates from the published record
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26 Aug 2026
Received by City of London
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8 Sep 2026
Added to PlanIndex
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Decision
Awaiting decision
Decision expected by 21 October 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.
City of London took a median of 85 days over the applications it decided in the last year.
What happens while it is decided
This application is with City of London for determination, against a statutory target of eight weeks. Over the last year City of London decided heritage and listed building applications in a median of 101 days. More in our guide to how long planning decisions take.
About heritage and listed building applications
Listed building consent is needed for works that affect the special interest of a listed building, and carrying out such works without it is a criminal offence. More in our guide to planning application types.
Nearby applications
Within 500 metres
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St Mary Abchurch House 123 - 127 Cannon Street London EC4N 5AU
100% historically approved · decision due ~1 Oct
Non-material amendment under Section 96A of the Town and Country Planning Act 1990 (as amended) to planning permission 24/00995/FULL dated 23 December 2024 to: (i) revise the ground floor entrance arrangement, maintenance requirements, ventilation louvres and (ii) revise the sixth floor layout to include staff WC, increase the plant area, amend fire escape access.
Awaiting decision Amendments 14 docs -
131 - 133 Cannon Street London EC4N 5AX
Change of use from Class E at basement and ground floor to cafe/bar Class E(b) and from office Class E(gi) to residential C3 at first to fifth floor for 1 x studio flat and 2 x maisonette flats with shared amenity space at sixth floor, external alterations, cycle store, refuse storage, plant room and other works associated with the proposed development.
Refused Full applications New dwelling 43 docs -
St Mary Abchurch House 123 - 127 Cannon Street London EC4N 5AU
100% historically approved · decision due ~23 Mar
Non material amendments under section 96A of the Town and Country Planning Act 1990 (as amended) to planning permission ref 24/00995/FULL (dated 12/09/2024), to: (i) accommodate a revised smoke vent.
Awaiting decision Amendments 16 docs -
St Mary Abchurch House 123 - 127 Cannon Street London EC4N 5AU
100% historically approved · decision due ~29 Jan
Amendment to the ground floor Cannon Street elevation to accommodate a revised smoke vent; Spatial reconfiguration of the ground floor lobby including installation of a dropped ceiling
Awaiting decision Heritage and listed buildings 17 docs -
St Mary Abchurch House 123 - 127 Cannon Street London EC4N 5AU
The conversion of the existing commercial accommodation (Class E) at first to fifth floors into 30 x serviced apartments (Class C1), internal alterations associated with the change of use, the creation a new lobby space with waste and bicycle storage space at ground floor level, installation of a partition to the rear of the ground floor commercial (Class E) unit (retrospective consent), installation of mechanical plant and machinery at ground to the rear of the ground floor commercial (Class E) unit with access from a new door to Abchurch Yard, alterations to the existing ground floor entrance door, alterations at roof level including the provision of replacement plant and machinery, and other associated works.
Granted Full applications New dwelling 74 docs -
St Mary Abchurch House 123 - 127 Cannon Street London EC4N 5AU
The conversion of the existing commercial accommodation (Class E) at first to fifth floors into 30 x serviced apartments (Class C1), internal alterations associated with the change of use, the creation a new lobby space with waste and bicycle storage space at ground floor level, installation of a partition to the rear of the ground floor commercial (Class E) unit (retrospective consent), installation of mechanical plant and machinery at ground to the rear of the ground floor commercial (Class E) unit with access from a new door to Abchurch Yard, alterations to the existing ground floor entrance door, alterations at roof level including the provision of replacement plant and machinery, and other associated works.
Granted Heritage and listed buildings New dwelling 68 docs
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