Chandlers Hills Lane Cookham Maidenhead SL6 9NT Data via plota.co.uk

26/01592/PDXL - Permitted Development Extended Decided
Extensions & alterations

Proposal

Single storey rear extension no greater than 8.00m in depth, 4.00m high with an eaves height of 3.00m. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
29 Jun 2026
✓
Prior Approval Not Required
5 Aug 2026

Prior Approval Not Required on 5 Aug 2026 · Delegated · Last checked 6 Aug 2026

Documents 8

Decision & officer reports 1

PDF Prior approval not required pd Councils Decision · 5 Aug 2026 View ↗

Statements & assessments 2

PDF Planning officers report Planning Officers Assessment · 5 Aug 2026 View ↗ PDF Prior notification statement Correspondence - General · 29 Jun 2026 View ↗

Application forms 1

PDF Application form redacted Application Forms · 29 Jun 2026 View ↗

Consultation & comments 3

PDF Cookham parish council comments Parish Council Comments · 16 Jul 2026 View ↗ PDF Comments from cookham parish council planning committee Parish Council Comments · 15 Jul 2026 View ↗ PDF Neighbour notification list Neighbour Notification List · 1 Jul 2026 View ↗

Other documents 1

PDF History log Property History · 1 Jul 2026 View ↗

All documents on the council site ↗

Site constraints 4

Green belt: London
Inappropriate development needs very special circumstances.
Green belt policy allows a short list of exceptions, such as limited extensions and replacement buildings. Anything else needs very special circumstances that clearly outweigh the harm.
Habitat network: Network Enhancement Zone 2
Where habitat is joined up enough to work as a network. Context, not a constraint on its own.
Also on the record
Inside the Cookham built-up area; the 1970s provisional farmland map had this area as grade 2, but it predates the buildings here and the current map does not class it as farmland.
Not affected
Outside flood zones 2 and 3 · No listed building at the site · No scheduled monument at the site

Checked on 11 September 2026. Historic England, the Environment Agency, Natural England and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.

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Important details

Council
Windsor and Maidenhead
Application type
Permitted Development Extended
Postcode
SL6 9NT
Received
29 Jun 2026
Validated
29 Jun 2026
Ward
Bisham And Cookham
Parish
Cookham Parish
Case officer
Show
Target decision
9 Aug 2026
Decision
Prior Approval Not Required
Decision date
5 Aug 2026
Decision level
Delegated
Applicant
Show
Agent
Show

Consultation & key dates

Alt. reference
PP-14957015
Comments by
21 Jul 2026
Env. assessment
No

Historical activity at this location

8 nearby applications on record - archival context, not part of the live application.

Within ~100m

Nearby activity

2025 Refused
Land Adjacent To Hills Cottage Hills Lane Cookham Maidenhead
Phased development of up to 2no. self build dwellings.
25/01648/PIP
2023 Withdrawn
Land To The South of Holly Lodge Hills Lane Cookham Maidenhead
New tractor garage, welfare unit and manure composter.
23/02133/FULL
2021 Approved
Slade House Hills Lane Cookham Maidenhead SL6 9NT
First floor side extension with rear terrace and balustrade, partial new roof, changes to…
21/02373/FULL
2020 Approved
Land To The South of Holly Lodge Hills Lane Cookham Maidenhead
Reserved matters pursuant to outline planning permission 20/00578/OUT for outline applica…
20/02711/REM
2020 Approved
Land To The South of Holly Lodge Hills Lane Cookham Maidenhead
Details required by condition 5 (storage and disposal of animal and other waste) of plann…
20/02710/CONDIT
2020 Approved
Land To The South of Holly Lodge Hills Lane Cookham Maidenhead
Outline application for appearance, layout and scale only to be considered at this stage…
20/00578/OUT
2017 Approved
Little Slades Hills Lane Cookham Maidenhead SL6 9NT
Construction of two storey and single storey side extension following demolition of exist…
17/02281/FULL
2016 Approved
Swiss Cottage Dean Lane Cookham Maidenhead SL6 9AG
Single storey side and rear extension to garage.
16/03441/FULL
Windsor and Maidenhead
Planning Authority Score
5.3/10
Average
#135 of 296 councils
Relevant to this application:
Householder decisions

Windsor and Maidenhead is faster than most councils at deciding householder applications, ranking #82 out of 296. Only 28% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Windsor and Maidenhead is also one of the strictest councils - it refuses more householder applications than almost any other, with only 74% approved vs 90% nationally.

One of the strictest councils
only 74% approved vs 90% nationally
These figures are council-wide context, not a prediction for this application. View full council performance
Windsor and Maidenhead decision statistics
Based on MHCLG data, the year to March 2026
72%
Overall approval rate
Below avg (87%) #293 of 296
74%
Householder approved
Below avg (90%) #294 of 296
75%
Decided in 8 weeks
Above avg (63%) #82 of 296
28%
Extended time limit
Below avg (41%) #47 of 296
44%
Minor dwellings approved
156 decided (1-9 homes)
96%
Major dwellings approved
27 decided (10+ homes)
64%
Change of use approved
25 decided
1,530
Total decisions
434 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings