Planning application
51 Calthorpe Street London WC1X 0HH
Works: New dwelling Extension Loft or dormer
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
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
As published by the council, reference 2015/3049/P
Application record
- Reference
- 2015/3049/P
- Category
- Full applications
- Status
- Final Decision
- Decision
- Granted Subject to a Section 106 Legal Agreement
- Decided
- 16 Feb 2018
- 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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2022/1297/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) 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.
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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
Timeline
Dates from the published record
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16 Feb 2018
Decision issued: Granted Subject to a Section 106 Legal Agreement
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22 Jul 2026
Added to PlanIndex
What this grant of permission means
Camden granted permission on 16 February 2018, 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 500 metres
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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
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.
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
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
Other full applications
In Camden
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2026/2516/P Withdrawn
31 Loveridge Road London Camden NW6 2DU
Amalgamation of the existing three self-contained one-bedroom flats into a single-family dwelling house; demolition and replacement of existing outrigger; erection of a single-storey rear wrap-around extension; erection of a rear dormer extension; creation of a roof terrace above outrigger; replacement of existing windows with timber double glazed units; installation of rooflights to front roofslope; and installation of an air source heat pump in rear garden.
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2026/3830/P Awaiting decision
Euston Tower 286 Euston Road London NW1 3DP
Deed of variation to allow more flexibility with Affordable housing payments for redevelopment of Euston Tower comprising retention of parts of the existing building (including central core, basement and foundations) and erection of a new building incorporating these retained elements, to provide a 32-storey mixed-use building providing offices and research and development floorspace (Class E(g)) and office, retail, café and restaurant space (Class E) and Enterprise Space (Class E/F) at ground and first floors, and associated external terraces; public realm enhancements, including new landscaping and provision of new publicly accessible steps and ramp; short and long stay cycle storage; servicing; refuse storage; plant and other ancillary and associated work.
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2026/3282/P Granted
5 Berkley Road London NW1 8XX
Installation of 1no. above ground gas riser from the basement flat to the meter box at first floor (retrospective)
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2026/0483/P Granted
100 Avenue Road London NW3 3HF
Discharge of details for condition 47 (surface water run off details) of planning permission 2026/0404/P granted on 19/06/2026 for " Variation of conditions (2 plan numbers); 8 (quantum of commercial space); 13 (commercial windows); 15 (Wind Microclimate); 19 (commercial windows); 24 (Air quality); 34 (development quantum); 40 (Circular Economy); 44 (designing out crime); 45 (Fire Strategy); 46 (SuDS); 48 (Community facility removed), 48 (wheelchair units), 49 (TfL health and safety) to planning permission ref. 2025/0852/P (for demolition of building and provision of a mixed-use residential-led development) to secure alterations to the external appearance; internal residential and commercial space layouts; omission of community floorspace and increased affordable housing provision; cycle and car parking; hard and soft landscaping, and other associated amendments”
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2026/2697/P Awaiting decision
Flat 1, 73 Eton Avenue London NW3 3EU
Replacement of existing defective rear lean-to conservatory with a new slimline powder-coated aluminium framed conservatory with clear double glazing, on the exact same footprint as existing.