Planning application
P2026/0543/FUL
27 St Thomas's Road, London, N4 2QH
Proposal
Erection of a mansard roof extension and lower ground floor rear extension
As published by the council, reference P2026/0543/FUL
Timeline
Dates from the published record
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25 Feb 2026
Received by Islington
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10 Mar 2026
Validated
Checked as complete and ready for consideration.
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17 Jun 2026
Decision issued: Approve with conditions
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25 Jul 2026
Added to PlanIndex
What a grant of permission means
The process from here
Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.
Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.
About full applications applications
How this application type works
A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.
Nearby applications
Within 500 metres
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P2026/0008/FUL Granted
Park Gate House, 250 - 252 Seven Sisters Road, London
Removal and replacement of existing metal cladding with facing brickwork to match existing, and conversion of an existing communal store to be incorporated into Unit 7 to provide an additional bedroom for flat 7.
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P2026/1480/NMA Decided
9, Prah Road, London, N4 2RA
Non-material amendment to planning permission ref: P2025/2916/FUL and allowed appeal (6002884) dated 27/04/2026 comprising alterations to the approved rear extension, including replacement of the timber glazing system with metal double-glazed doors and windows with low-level brick detailing; replacement of the approved corrugated metal pitched roof with a single-ply flat roof; amendment of the previously approved shallow-pitched roof to a flat roof (retaining the approved height); replacement of the approved rooflight with a high-level fanlight window; reduction in height of the curved roof element; omission of brick detailing beneath first and second floor windows to the partial-width extension; and alteration of front elevation glazing to stained glass within the existing opening.
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P2026/0993/FUL Granted
9 Prah Road, London, N4 2RA
Erection of a hip to gable roof extension and rear dormer roof extension clad in slate, alterations to existing side extension3 front rooflights and installation of A/C condenser unit on roof of side extension with associated works.
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P2024/0069/FUL Granted
2 Romilly Road, London, N4 2QZ
Erection of single storey first floor side extension and erection of a rear second floor extension.
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P2026/0060/FUL Granted
3 Plimsoll Road, London, N4 2EW
Erection of part single, part two storey rear extension
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P2024/0801 Withdrawn
6 - 9 Station Place, London, N4 2DH
Signage to advertise the proposed new store in an existing GF unit. 01 - Asda Letters 03 - Entrance Posts 04 - Service panel 05 - Various Vinyls
Other full applications applications
In Islington
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P2026/1970/FUL Awaiting decision
Garages G12 - 13, Brooksby Mews, London, N1 1EZ
External refurbishment of Garages G12 and G13, comprising: replacement of existing roof with new flat asphalt roof with three rooflights; replacement of existing front entrance doors with new painted timber bi-fold and tri-fold doors; replacement of existing front clerestory windows with full-width painted timber-framed glazing; replacement of existing rear clerestory windows on a like-for-like basis with timber-framed heritage glazing; and reinstatement of gateway to east elevation of G13.
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P2025/1883/FUL Granted
68 - 70 and 60 Goswell Road, London, EC1M 7AD
Comprehensive refurbishment of two existing buildings, comprising façade alterations, roof extensions incorporating new terrace space with metal balustrades, installation of photovoltaic (PV) panels, provision of new plant areas with screening, installation of new shopfronts and associated alterations.
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P2026/1227/FUL Refused
Flat C, 80 Birnam Road, London, N4 3LQ
Erection of L shaped rear dormer roof extension, installation of 2 front rooflights and new windows to rear elevation
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P2026/1352/FUL Granted
7-13 & 15-21 Wakeham Street, London, N1 3HP
Replacement of single glazed crittal windows with double glazed steel windows to front, side and rear elevations.
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P2026/1910/FUL Awaiting decision
25 Amwell Street, London, EC1R 1UN
Change of use of the building from an education use (Use Class F1) to a new office, training and collaborative spaces and networking areas (Sui Generis) along with the provision of cycle parking, external plant and other associated works. Removal of modern finishings and fittings; new flooring, lighting and finishes; repair and restoration of historic partitions; refurbishment of joinery and other historic features; overhaul and upgrading of windows and installation of secondary glazing; redecoration; new power lighting and ventilation; retention of historic plaque (internal); minor works to garden including cycle shed and lighting; install M and E and loft insulation, internal lift, ramped access at front [Listed Building Consent P2026/1911/LBC also submitted].