Planning application
HGY/2026/1056
Dyne House, Highgate School, Southwood Lane, London, N6 5EE
Proposal
Certificate of lawfulness for the replacement of the existing single glazed windows on Dyne House building with double glazed windows.
As published by the council, reference HGY/2026/1056
Timeline
Dates from the published record
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16 Jun 2026
Received by Haringey
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29 Jun 2026
Decision issued: Withdrawn
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25 Jul 2026
Added to PlanIndex
What withdrawal means
The process from here
The applicant withdrew this application before the council decided it, so it carries no planning weight and no fee refund is automatic. Withdrawal often follows officer feedback that a refusal was likely.
The applicant is free to submit a revised application at any time, and many withdrawn schemes return in amended form, so the site is worth watching if the proposal affected you.
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/2024/2130 Granted
Dyne House, 14 Southwood Lane, Hornsey, London, N6 5EE
Works to trees protected by an Area TPO. G1: 5 x Sycamore (16m): Crown thin by 30% and crown lift to 5m to allow more light into 17-19 Kingsley Place, to keep tree at a size suitable for its location and as part of regular maintenance. Trees are located on land adjacent to the Parade Ground behind 17-19 Kingsley Place
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HGY/2026/0168 Granted
22 Southwood Lane, Hornsey, London, N6 5EE
Oak + Maple - Crown reduce the height and spread back to the most historical pruning points (approx. 1.8m height and 1.5m spread) Crown thin/remove smaller branches in the inner canopy Reduce the extremities of branches growing towards the lamppost to give a clearance of 1.0m respectively Remove dead wood 2 x Lime - Crown reduce the height and spread back to the previous pollard points (approx. 2m height and 1.5m spread) leave growth growing laterally along boundary fence to act as screening up to a height of 4.0m-4.5m Remove basal growth Maintenance works in line with good arboricultural practice
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2012/6754/P Granted
Highgate School North Road N6 4AY
Observations to the adjoining borough of Haringey for the demolition of Chomeley House and ancillary residential unit, Tuck Shop building and substantial demolition of Five Courts. Erection of a new part 2 storey, part 3 storey Junior School building with link attachments to retained Ingleholme Building. External alterations to retained Ingleholme Building. External alterations to retained Ingleholme Building. Associated car and cycle parking, landscaping, games and play areas and altered pedestrian accesses.
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2011/2205/L Granted
Highgate Reservoir Highgate West Hill London
Repairs to existing railings and plinth around the perimeter of the site.
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2012/6878/C Refused
69 Highgate High Street London N6 5JX
Demolition of single storey buildings.
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2016/0529/P Granted
69 Highgate High Street London N6 5JX
Details of all new external windows and doors as required by condition 2, privacy screening as required by condition 7 and sedum roof as required by condition 8 of planning permission 2012/6826/P allowed on appeal on 11/12/2013 for; the erection of four storey building comprising commercial (Class B1a) at lower ground (Pond Square level), retail (Class A1) at ground (Highgate High Street level) and 1 x 3 bed self-contained maisonette (Class C3) at first and second floor levels following demolition of existing single storey buildings.
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).