Planning application
HGY/2026/0469
15A Cholmeley Park, Hornsey, London, N6 5ET
Proposal
Certificate of lawfulness for proposed use or development, to carry out internal works to the property to remove unauthorised annexe flat, to revert the use solely to as a one single family dwellinghouse (C3).
As published by the council, reference HGY/2026/0469
Timeline
Dates from the published record
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20 Feb 2026
Received by Haringey
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10 Apr 2026
Decision issued: Approve
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24 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 lawful development applications
How this application type works
A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.
Nearby applications
Within 500 metres
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HGY/2025/3338 Granted
15a, Cholmeley Park, Hornsey, London, N6 5ET
Variation of condition 2 (approved plans) of planning permission HGY/2023/2705 for Demolition of existing rear extension, erection of single-storey rear extension, enlargement of existing side extension, replacement of rear dormer roof extension to main roof, replacement of windows in front elevation to match existing in appearance, replacement of front door, changes to fenestration in side and rear elevations. Proposed changes to the fenestration on the side/rear elevations, and alterations to design and height of the side extension. Alterations to rear elevation treatment of rear dormer, increase in height of rear dormer by 0.2 metres.
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HGY/2026/0148 Granted
Annexe 15a, Cholmeley Park, Hornsey, London, N6 5ET
T1, T1 T3 Leyland cypress - remove and stump grind. (Trees form part of an old hedge) client plans ro remove overgrown trees and replant suitable hedge
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HGY/2025/3442 Granted
Annexe 15a, Cholmeley Park, Hornsey, London, N6 5ET
T1 Monterrey Cypress - reduce from 10m to 7m remove dead
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HGY/2026/1940 Awaiting decision
24 Cholmeley Park, Hornsey, London, N6 5EU
The application seeks planning permission for alterations to the front and rear elevations. These include the replacement of the internal glazed frame of one existing front window while retaining and restoring its external historic frame, the replacement of six existing front windows, and the replacement of four existing rear windows, together with the installation of an air conditioning unit positioned on the roof of the ground floor rear extension.
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HGY/2026/0650 Withdrawn
24 Cholmeley Park, Hornsey, London, N6 5EU
Approval of details pursuant by condition 3 (Window details) attached to ref: HGY/2024/3143
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HGY/2026/1886 Awaiting decision
24 Cholmeley Park, Hornsey, London, N6 5EU
Non-Material Amendment to permission ref: HGY/2024/3143 to changed description to '‘Erection of a rear ground floor and first floor extension following the demolition of the existing back additions and change two front windows (amended description)"
Other lawful development applications
In Haringey
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HGY/2026/2104 Granted
17 Sperling Road, Tottenham, London, N17 6UQ
Certificate of lawfulness for proposed use: Loft conversion with erection of rear L-shaped dormer and insertion of 2no. front rooflights.
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HGY/2026/1307 Granted
49 Lordsmead Road, Tottenham, London, N17 6EX
Certificate of lawfulness for the existing use of the property as five separate self-contained flats.
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HGY/2026/1885 Granted
6, Grainger Road, London, N22 5LT
Certificate of Lawfulness: Proposed alterations to the roof comprising the installation of 3no. rooflights (2no. front facing and 1no. rear facing).
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HGY/2026/1375 Granted
Flats 1, 2, & 3 149 Crescent Road, Wood Green, London, N22 7RU
Certificate of lawfulness for the existing use of the property as 3 self-contained flats (comprising of ground floor 2 bed, first floor 2 bed, second floor 1 bed) for more than 4 years.
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HGY/2026/1409 Granted
492 Archway Road, Hornsey, London, N6 4NA
Certificate of Lawfulness Existing Use. Use of lower ground floor as two flats (Use Class C3).