Planning application
HGY/2026/0490
30 Mansfield Avenue, Tottenham, London, N15 4HW
Proposal
Certificate of Lawfulness for proposed rear dormer extension and front rooflights to facilitate loft conversion
As published by the council, reference HGY/2026/0490
Timeline
Dates from the published record
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23 Feb 2026
Received by Haringey
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11 Mar 2026
Decision issued: Permitted Development
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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/2026/0806 Granted
30 Mansfield Avenue, Tottenham, London, N15 4HW
Lawful Development - Proposed construction of rear extension of 3m depth and 3 metres height.
-
HGY/2025/2836 Refused
4 Bourn Avenue, Tottenham, London, N15 4HP
Change of Use from single family dwelling (class C3) to House in Multiple Occupation (Class C4) for up to 4 people.
-
HGY/2026/1385 Refused
4 Bourn Avenue, Tottenham, London, N15 4HP
Change of use from a single-dwelling house (C3) to a HMO (C4) for 4 persons
-
HGY/2026/1541 Awaiting decision
5, 7, & 9 Dorset Road, Tottenham, London, N15 5AJ
Replacing existing single-glazed timber windows at 5, 7 and 9 Dorset Road with slimline double‑glazed timber units to the front elevation and double‑glazed uPVC vertical sliding and casement windows to the rear and side elevations; Roof works at no. 7 replacing existing slate roof with new natural Welsh slate, and associated repairs to chimneys, soffits and rainwater goods.
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HGY/2026/1173 Granted
306 Philip Lane, Tottenham, London, N15 4AB
Erection of a ground floor rear extension
-
HGY/2023/0143 Granted
290 Philip Lane, Tottenham, London, N15 4AB
Meets the requirements of the GPDO: Demolition of existing dormer and construction of new rear dormer
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.
-
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.
-
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).
-
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).