Planning application
51 Calthorpe Street London WC1X 0HH
Works: New dwelling Extension Loft or dormer
Relates to 2018/1142/P
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Variation of Condition 2 (Approved Plans) granted under planning reference 2018/1142/P dated 26/01/22 for (Change of use from offices (Class B1a) to create a mixed use scheme of office use (Class B1a) and 8 self-contained flats (Class C3) (2x 1 bed, 4x 2 bed and 2x 3 bed); mansard roof extension to main building; roof extension to rear part of building; creation of internal mezzanine floors; excavation to create basement; associated works) to involve changes: consolidating the design of the mansard roof, enabling lift access at third floor level and minor changes to the layout of some of the flats in the building.
As published by the council, reference 2022/1297/P
Application record
- Reference
- 2022/1297/P
- Category
- Full applications
- Status
- Final Decision
- Decision
- Granted As published: Granted Subject to a Section 106 Legal Agreement
- Decided
- 19 Jul 2023
- Postcode
- WC1X 0HH
Site history
Applications at this address on the Camden register
This site has had 7 applications since 2018: 7 approved, 0 refused.
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2024/1245/P Granted
51 Calthorpe Street London WC1X 0HH
Variation of Condition 2 (Approved Plans) granted under planning reference 2018/1142/P dated 26/01/22 for '(Change of use from offices (Class B1a) to create a mixed use scheme of office use (Class B1a) and 8 self-contained flats (Class C3) (2x 1 bed, 4x 2 bed and 2x 3 bed); mansard roof extension to main building; roof extension to rear part of building; creation of internal mezzanine floors; excavation to create basement; associated works)'. Namely amendments to the ground and lower-ground floors to provide a surface level bin store in place of an underground store access via lift
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2023/4304/P Granted
51 Calthorpe Street London WC1X 0HH
Details pursuant to conditions 4 (materials) and 14c (remediation) of planning permission 2022/3908/P dated 19 July 2023 for the Change of use from offices (Class B1a) to create a mixed use scheme of office use (Class B1a) and 8 self-contained flats (Class C3) (2x 1 bed, 4x 2 bed and 2x 3 bed); mansard roof extension to main building; roof extension to rear part of building; creation of internal mezzanine floors; excavation to create basement; associated works.
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2022/3908/P Granted
51 Calthorpe Street London WC1X 0HH
Variation of condition 11 (privacy) of planning permission ref: 2022/1297/P dated 17 February 2023 (for the change of use from offices (Class B1a) to create a mixed use scheme of office use (Class B1a) and 8 self-contained flats (Class C3); mansard roof extension to main building; roof extension to rear part of building; creation of internal mezzanine floors; excavation to create basement; and associated works)
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2022/3907/P Granted
51 Calthorpe Street London WC1X 0HH
Details pursuant to conditions 6 (cycle storage) and 15 (mechanical ventilation system) of planning permission 2018/1142/P granted on 26 January 2022 for the change of use from offices (Class B1a) to create a mixed use scheme of office use (Class B1a) and 8 self-contained flats (Class C3); mansard roof extension to main building; roof extension to rear part of building; creation of internal mezzanine floors; excavation to create basement; associated works
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2018/1142/P Granted
51 Calthorpe Street London WC1X 0HH
Change of use from offices (Class B1a) to create a mixed use scheme of office use (Class B1a) and 8 self-contained flats (Class C3) (2x 1 bed, 4x 2 bed and 2x 3 bed); mansard roof extension to main building; roof extension to rear part of building; creation of internal mezzanine floors; excavation to create basement; associated works
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2015/3049/P Granted
51 Calthorpe Street London WC1X 0HH
Change of use from offices (Class B1a) to residential (Class C3) to create 13x self-contained flats (4x 1-bed; 4x 2-bed; 3x 3-bed; 2x 4-bed); mansard roof extension to main building; roof extension to rear part of building; creation of internal mezzanine floors; excavation to create basement; associated works
Timeline
Dates from the published record
-
19 Jul 2023
Decision issued: Granted Subject to a Section 106 Legal Agreement
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22 Jul 2026
Added to PlanIndex
Related applications
Cases linked to this one on the register
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2018/1142/P Granted
51 Calthorpe Street London WC1X 0HH
Change of use from offices (Class B1a) to create a mixed use scheme of office use (Class B1a) and 8 self-contained flats (Class C3) (2x 1 bed, 4x 2 bed and 2x 3 bed); mansard roof extension to main building; roof extension to rear part of building; creation of internal mezzanine floors; excavation to create basement; associated works
2 later applications on the register refer to this one:
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2023/3298/P Withdrawn
51 Calthorpe Street London Camden WC1X 0HH
Non material amendment to planning permission 2022/1297/P dated 19/07/2023 for Variation of Condition 2 (Approved Plans) granted under planning reference 2018/1142/P dated 26/01/22 for '(Change of use from offices (Class B1a) to create a mixed use scheme of office use (Class B1a) and 8 self-contained flats (Class C3) (2x 1 bed, 4x 2 bed and 2x 3 bed); mansard roof extension to main building; roof extension to rear part of building; creation of internal mezzanine floors; excavation to create basement; associated works)'. Namely amendments to the ground and lower-ground floors to provide a surface level bin store in place of an underground store access via lift.
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2022/3908/P Granted
51 Calthorpe Street London WC1X 0HH
Variation of condition 11 (privacy) of planning permission ref: 2022/1297/P dated 17 February 2023 (for the change of use from offices (Class B1a) to create a mixed use scheme of office use (Class B1a) and 8 self-contained flats (Class C3); mansard roof extension to main building; roof extension to rear part of building; creation of internal mezzanine floors; excavation to create basement; and associated works)
What this grant of permission means
Camden granted permission on 19 July 2023, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.
About full applications
A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.
Nearby applications
Within 0.3 miles
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51 Calthorpe Street London WC1X 0HH
Details pursuant to conditions 4 (materials) and 14c (remediation) of planning permission 2022/3908/P dated 19 July 2023 for the Change of use from offices (Class B1a) to create a mixed use scheme of office use (Class B1a) and 8 self-contained flats (Class C3) (2x 1 bed, 4x 2 bed and 2x 3 bed); mansard roof extension to main building; roof extension to rear part of building; creation of internal mezzanine floors; excavation to create basement; associated works.
Granted Full applications New dwelling Extension +1 3 docs -
51 Calthorpe Street London WC1X 0HH
Change of use from offices (Class B1a) to residential (Class C3) to create 13x self-contained flats (4x 1-bed; 4x 2-bed; 3x 3-bed; 2x 4-bed); mansard roof extension to main building; roof extension to rear part of building; creation of internal mezzanine floors; excavation to create basement; associated works
Granted Full applications New dwelling Extension +1 -
51 Unit A Calthorpe Street London Camden WC1X 0HH
Details pursuant to Condition 5 (Hard and soft landscape details), 9 (Green roof details), 10 (Chartered engineer details), 14A & 14B (Preliminary risk assessment) & (Site investigation scheme) granted under planning permission reference 2018/1142/P dated 26/01/22 for Change of use from offices (Class B1a) to create a mixed use scheme of office use (Class B1a) and 8 self-contained flats (Class C3) (2x 1 bed, 4x 2 bed and 2x 3 bed); mansard roof extension to main building; roof extension to rear part of building; creation of internal mezzanine floors; excavation to create basement; associated works
Granted Full applications New dwelling Extension +1 -
51 Calthorpe Street London WC1X 0HH
Details pursuant to conditions 6 (cycle storage) and 15 (mechanical ventilation system) of planning permission 2018/1142/P granted on 26 January 2022 for the change of use from offices (Class B1a) to create a mixed use scheme of office use (Class B1a) and 8 self-contained flats (Class C3); mansard roof extension to main building; roof extension to rear part of building; creation of internal mezzanine floors; excavation to create basement; associated works
Granted Full applications New dwelling Extension +1 -
51 Calthorpe Street London WC1X 0HH
Variation of condition 11 (privacy) of planning permission ref: 2022/1297/P dated 17 February 2023 (for the change of use from offices (Class B1a) to create a mixed use scheme of office use (Class B1a) and 8 self-contained flats (Class C3); mansard roof extension to main building; roof extension to rear part of building; creation of internal mezzanine floors; excavation to create basement; and associated works)
Granted Full applications New dwelling Extension +1 -
John Stewart House 51 Calthorpe Street London WC1X 0HH
Erection of an additional storey, a three storey rear extension, roof extension, the creation of a new front basement and the excavation of an existing basement, in connection with the change of use of the property from offices (Class B1) and storage (Class B8) to create 17 new dwellings (Class C3).
Refused Full applications New dwelling ExtensionMajor scheme
Other full applications
In Camden
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2026/0990/P Refused
1 Bleeding Heart Yard & 19 Greville Street London EC1N 8SJ
Change of use from office space and restaurant use (Class E) and members club (Sui Generis) to affordable workspace and restaurant use (Class E) and 1 x residential unit on the third and fourth floors (Class C3). Erection of a two-storey roof extension across 19 Greville Street and 1 Bleeding Heart Yard, including alterations at second-floor level to the interior courtyard elevation, ground-floor fenestration changes, and a roof terrace for the associated residential unit.
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2026/3044/P Granted
London Irish Centre 50-52 Camden Square London NW1 9XB
Details to discharge Condition 25 Part A (Air Quality Monitoring) of planning permission ref. 2020/1481/P dated 17/05/24 for 'Redevelopment of site to provide new and reconfigured community centre and ancillary residential accommodation (Class D1/ D2) involving alterations to retained buildings at No's. 50, 51 and 52 Camden Square including replacement of two storey 'link' building; demolition of Murray Street and Murray Mews buildings and replacement with part-three / part-four storey building (plus basement level) with second and third floor terraces and new entrance; associated landscaping and cycle parking'.
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2026/4338/P Awaiting decision
32 Willoughby Road London NW3 1RU
Details to discharge condition 6 (tree protection methods) of planning permission 2025/4186/P granted 13/11/2025 for 'Demolition of existing two storey outrigger and replacement with part two-storey, part single storey rear extension, loft conversion with dormer and roof light to main roof at rear, new windows to flanking wall, replacement of existing windows and installation of a gate and fence to side'.
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2026/4141/P Awaiting decision
24 Endell Street London WC2H 9HQ
Relocation of three air conditioning condenser units to first floor roof, construction of an acoustic enclosure and other associated works.
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2026/3907/P Awaiting decision
Flat 1 16 Lyndhurst Road London NW3 5NL
External renovations to the front of the property, including works to the entry porch, steps, replacment front door, installation of metal railings to boundary wall and paving to front garden and erection of a glass roof to the side passage to create a bike shelter.