Planning application
26/00249/CPD
Heathfield House Heathfield Avenue Ascot SL5 0AL
Proposal
Certificate of lawfulness to determine whether the proposed all-weather tennis court and associated chain-link perimeter incidental to the main dwelling is lawful.
As published by the council, reference 26/00249/CPD
Timeline
Dates from the published record
-
29 Jan 2026
Received by Windsor and Maidenhead
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24 Feb 2026
Decision issued: Permitted Development
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25 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
-
22/03239/TPO Granted
Pinewood Heathfield Avenue Ascot SL5 0AL
T2 - 1 x Pine - tip reduce lateral branches to give up to 2.5m clearance to the house. G3 - 3 x Douglas Fir - remove major deadwood (019/2006/TPO).
-
26/01421/FULL Awaiting decision
Flat 1 Larchwood Lodge Larch Avenue Ascot SL5 0AR
Single storey extension to south facing elevation.
-
22/02845/TPO Granted
Habibah Heathfield Avenue Ascot SL5 0AL
T1 - Oak - Raise canopy up to 5m from ground level to allow a 3m clearance to annexe building. (060/2005/TPO)
-
26/01435/CPD Awaiting decision
Shutt End Larch Avenue Ascot SL5 0AP
Certificate of lawfulness to determine whether the proposed single storey side extension, two story rear extension and alterations to fenestration are lawful.
-
26/01221/VAR Granted
House In The Wood Larch Avenue Ascot SL5 0AP
Variation (under Section 73a) of Condition 3 to substitute those plans approved under 24/01752/FULL for a Front canopy with balcony above, single storey infill extension, new enclosed courtyard, enlargement of existing conservatory, first floor rear infill extension, enlargement of existing second floor with 1no. rear balcony, enlargement and alterations to existing raised patio and alterations to fenestration and existing chimneys following removal of existing rear dormer (part retrospective) with amended plans.
-
24/01727/TPO Granted
Land And Buildings At Sunningdale Park Adjacent Larch Avenue Ascot
(T480) Pinus Nigra - fell. (T481) Acer pesudoplatanus - fell. (0015/2017/TPO).
Other lawful development applications
In Windsor and Maidenhead
-
26/01836/CPD Awaiting decision
Rivendale 22A Gloucester Drive Wraysbury Staines TW18 4TY
Certificate of lawfulness to determine whether the proposed conversion of the existing garage into habitable space is lawful.
-
26/01528/CPD Granted
Foxley Manor Forest Green Road Holyport Maidenhead SL6 2NW
Certificate of lawfulness to determine whether the proposed erection of an outbuilding is lawful.
-
26/01532/CPD Granted
72 Highway Avenue Maidenhead SL6 5AQ
Certificate of Lawfulness to determine whether the proposed rear dormer roof extension and associated internal alterations to enlarge the existing loft accommodation is lawful.
-
26/01823/CPD Awaiting decision
Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB
Certificate of lawfulness to determine whether the proposed garage conversion, alterations to fenestration, 1 no. front dormer and 1 no. rear dormer to facilitate a loft conversion is lawful.
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26/01772/CPD Granted
18 Broken Furlong Eton Windsor SL4 6PD
Certificate of lawfulness to determine whether the proposed erection of a single storey rear detached annex to be used incidental with the host dwelling is lawful.