Planning application
26/00499/CPD
8 Allen Close Sunbury-on-Thames TW16 5LT
Proposal
Certificate of Lawfulness for the proposed single storey side extension, and single storey rear extension.
As published by the council, reference 26/00499/CPD
Timeline
Dates from the published record
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15 May 2026
Received by Spelthorne
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8 Jul 2026
Decision issued: Grant Cert Lawful Prop Use/Dev
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30 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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26/00749/HOU Awaiting decision
8 Allen Close Sunbury-on-Thames TW16 5LT
Erection of a single storey side/rear wraparound extension with part two-storey rear extension.
-
21/00944/TPO Granted
132 The Avenue Sunbury-on-Thames TW16 5EA
TPO030SUN - T164 (T1 on received plan) - Horse Chestnut - Reduce crown as a whole to previous management points (approx. 2.5m), leaving as natural shape as possible
-
26/00068/HOU Awaiting decision
144 The Avenue Sunbury-on-Thames TW16 5EA
Installation of 3no. external air conditioning units (retrospective)
-
21/01020/CPD Granted
174 Staines Road East Sunbury-on-Thames TW16 5AY
Certificate of Lawfulness for the proposed development of loft alterations to include a hip to gable alteration, a rear facing dormer with and 2 no. roof lights within the front roof slope.
-
23/00204/HOU Granted
139 The Avenue Sunbury-on-Thames TW16 5EQ
Replacement of the existing garage doors with new brick wall, window and door
-
23/00175/PDH Granted
23 Sunna Gardens Sunbury-on-Thames TW16 5EE
Prior Approval Notification for a single storey rear extension extending 3.6 metres beyond the rear wall of the original house, with a maximum height of 3.4 metres and a height of 2.55 metres to the eaves (As shown on plans: PL01; 02; 03; 04; 05)
Other lawful development applications
In Spelthorne
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26/00604/CPD Granted
13 Lucie Avenue Ashford TW15 2BH
Certificate of lawfulness for proposed rear dormer loft conversion with 3 front roof windows
-
26/00585/CPD Granted
55 Gordon Close Staines-upon-Thames TW18 1AP
Certificate of lawfulness for proposed dormer in rear roof and hip to gable extension and two rooflights within the front roof slope
-
26/00563/CPD Granted
141 Gaston Way Shepperton TW17 8ET
Certificate of lawfulness for loft conversion with rear flat roof dormer
-
26/00571/CPD Granted
21 Arnold Road Laleham Staines-upon-Thames TW18 1LY
Certificate of Lawfulness for proposed hip to gable roof alteration with rear facing dormer and 2 no. roof lights on front roof plane (As shown on Location plan and plans no's MATTHEW/PLAN/001, /002, /003, /004 rec'd 01.06.2026.)
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26/00787/CPD Awaiting decision
91 Metcalf Road Ashford TW15 1HB
Certificate of Lawfulness for the proposed erection of a front porch.