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Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

26/01823/CPDCert of Lawfulness of Proposed DevAwaiting decision
Outline / PiP
Approximate site (title boundary)
Boundary © HM Land Registry, © Ordnance Survey · details

This information is subject to Crown copyright and database rights 2026 and is reproduced with the permission of HM Land Registry. The polygons (including the associated geometry, namely x, y co-ordinates) are subject to Crown copyright and database rights 2026 Ordnance Survey AC0000851063. Conditions of use.

Proposal

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.

Received
24 July 2026
Decision due
17 September 2026
Ward
Bisham And Cookham
  1. Received24 Jul
  2. Validated24 Jul
  3. Consult.
  4. Target17 Sep
  5. Decided

Have your say

Comment on the council's siteDocuments (10)

About this application

This is an outline application for a loft conversion at Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB. Windsor has handled 644 applications of this type. It has been with the council since 24 July 2026 and is still awaiting a decision. The site is in a conservation area. There have been 4 other applications at this address. In the past year there have been 129 applications across Bisham And Cookham. We hold 2,121 applications in total for the SL6 postcode area.

67% of outline applications at Royal Borough of Windsor and Maidenhead were approved. Across all application types, the council typically decides in about 8 weeks (median).

Based on decided applications received in the last 3 years.See what's approved near your address

Application details

Postcode
SL6 9UB
Application type
Cert of Lawfulness of Proposed Dev
Scale / size
Small
Parish
Cookham Parish

Planning application dates

Date validated
24 July 2026

Applicant and agent

Agent address
TRA Studio 34C Panorama Road Poole BH13 7RD

Planning decision

Statutory period
55 days

Additional information

Planning Portal ID
PP-15108498
Documents
10

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Green belt: Windsor and Maidenhead
  • Ancient woodlandNext to the site
  • Flood zone 1: Low probability (rivers and sea)

Not published by this council, so not checked: conservation areas, Article 4 directions and tree preservation orders. Ask the council if these matter.

Also checked, none recorded (19)

flood storage areas, listed buildings, scheduled monuments, World Heritage Sites, World Heritage Site buffer zones, registered parks and gardens, registered battlefields, Heritage at Risk entries, nutrient neutrality catchments, national parks, National Landscapes, SSSIs, Special Areas of Conservation, Special Protection Areas, Ramsar sites, national nature reserves, local nature reserves, heritage coasts and brownfield registers.

A guide only, from official open data; it is not a planning search. Flood zones cover rivers and sea, not surface water.

Data © Crown copyright and others · sources and licences

Contains public sector information from planning.data.gov.uk (MHCLG and local planning authorities), licensed under the Open Government Licence v3.0. © Crown copyright and database right 2026.

© Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026. The Historic England GIS Data contained in this material was obtained on 2026-11-03. The most publicly available up to date Historic England GIS Data can be obtained from HistoricEngland.org.uk.

© Natural England copyright. Contains Ordnance Survey data © Crown copyright and database right 2026.

© Environment Agency copyright and/or database right 2026. All rights reserved. Flood Map for Planning, Open Government Licence v3.0.

Contains Ordnance Survey data © Crown copyright and database right 2026.

Source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2026.

Associated applications

  1. 2026
    24 Jul

    Single storey side/rear extension no greater than 8.00m in depth, 4.00m high with an eaves height of 3.80m.

    PendingApplicationFiled alongside26/01822/PDXL
  2. 2026
    24 Jul

    Certificate of lawfulness to determine whether the proposed garage conversion, alterations to fenestration, 1…

    This applicationPendingOutline26/01823/CPD

Source: Windsor

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