Planning application
26/00226/CPD
79 Maryland Way Sunbury-on-Thames TW16 6HW
Proposal
Erection of a single-storey detached outbuilding to the rear garden for incidental use as a gym, and conversion of an existing integral garage to habitable accommodation including replacement of the garage door with a window and wall infill.
As published by the council, reference 26/00226/CPD
Timeline
Dates from the published record
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6 Mar 2026
Received by Spelthorne
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24 Apr 2026
Validated
Checked as complete and ready for consideration.
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26 Jun 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
-
21/00951/HOU Granted
38 Maryland Way Sunbury-on-Thames TW16 6HR
The retention of a front boundary wall with a maximum height of 1.19 metres (retrospective).
-
21/01062/HOU Granted
32 Vereker Drive Sunbury-on-Thames TW16 6HF
Erection of a part two storey part first floor rear extension and the installation of a front facing dormer window. A new pitched roof over an existing single storey rear extension.
-
21/00866/HOU Withdrawn
3 Maryland Way Sunbury-on-Thames TW16 6HN
Proposed roof extension that would include front/side extension with first floor over and raising the ridge height to convert existing bungalow to a two storey house including the erection of a single storey rear extension and first floor rear facing Juliet balconies. The incorporation of integral garage (following demolition of existing garage).
-
24/01126/HOU Granted
19A Queensway Sunbury-on-Thames TW16 6HA
Erection of single storey rear extension (following demolition of existing conservatory)
-
24/01139/CPD Granted
115 Manor Lane Sunbury-on-Thames TW16 6JE
Certificate of lawfulness for the proposed development of a loft conversion to include a hip to gable extension, a rear facing dormer, three no. front facing rooflights and a side window.
-
26/00456/HOU Granted
66 Manor Lane Sunbury-on-Thames TW16 6JA
Retrospective application for an outbuilding (as shown on plans: PL1/SM/66-00; 01; 02 received 05.05.2026)
Other lawful development applications
In Spelthorne
-
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.