38 Tilstone Close Eton Wick Windsor SL4 6NG Data via plota.co.uk

26/01648/CPD - Cert of Lawfulness of Proposed Dev Approved
Extensions & alterations

Proposal

Certificate of lawfulness to determine whether the proposed formation of habitable room in roofspace with side dormer, 1 No front and side rooflights, 1 No. rear window with Juliet balcony, part hip to gable and raising of the ridge is lawful. Data via plota.co.uk

Track application Save this application and get an email when its status or decision changes. Alerts nearby Get email alerts for new planning applications near this address.
View original council record ↗Last checked

Application progress

✓
Received
6 Jul 2026
✓
Approved
7 Sept 2026

Approved on 7 Sept 2026 · Delegated · Last checked 8 Sept 2026

Documents 9

Decision & officer reports 1

PDF Permit proposed development Councils Decision · 7 Sept 2026 View ↗

Statements & assessments 1

PDF Planning officers report Planning Officers Assessment · 7 Sept 2026 View ↗

Application forms 1

PDF Cil form 1 CIL Documents · 6 Jul 2026 View ↗

Other documents 6

PDF Clarification re juliet balcony Correspondence - General · 7 Sept 2026 View ↗ PDF Eot 110926 Extension of Time · 7 Sept 2026 View ↗ PDF Confirmation not above ridge Correspondence - General · 27 Aug 2026 View ↗ PDF Eot 040926 Extension of Time · 27 Aug 2026 View ↗ PDF History log Property History · 13 Jul 2026 View ↗ PDF Application Forms Application Forms · 6 Jul 2026 View ↗

All documents on the council site ↗

Site constraints 4

Flood zone 2, rivers and sea
Medium chance: between a 1 in 100 and 1 in 1,000 annual chance from rivers, or 1 in 200 to 1 in 1,000 from the sea. Any development here needs a flood risk assessment. Defences are not counted.
The Environment Agency flood map for planning. Homes in zone 3 must also pass the sequential test. Surface water flooding is a separate map.
Flood map ↗
Also on the record
Inside the Eton Wick built-up area; Green belt 35 m away: London; the 1970s provisional farmland map had this area as grade 3, but it predates the buildings here and the current map does not class it as farmland.
Not affected
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.

Work with planning data?

Every application in Windsor and Maidenhead - and every UK council - as a live feed, an API, or a bulk CSV export.

About Plota's data service

Other new applications on this street

28 Apr 2026Approved

1 Tilstone Close Eton Wick Windsor SL4 6NG

Single storey side/rear extension following demolition of existing elements.

26/01045/FULL

Nearby new applications

17 Jul 2026Pending

27 Princes Close Eton Wick Windsor SL4 6LZ

Part single part two storey side/rear extension, 1no. rear dormer, 4no. front ro...

26/01587/FULL
17 Jul 2026Refused

20 Victoria Road Eton Wick Windsor SL4 6LY

New front boundary treatment, piers and gates (part retrospective).

26/01566/FULL

Important details

Council
Windsor and Maidenhead
Application type
Cert of Lawfulness of Proposed Dev
Postcode
SL4 6NG
Received
6 Jul 2026
Validated
6 Jul 2026
Ward
Eton And Castle
Parish
Eton Town Council
Case officer
Show
Target decision
11 Sept 2026
Decision
Permitted Development
Decision date
7 Sept 2026
Decision level
Delegated
Applicant
Show
Agent
Show

How this decision compares

Decided in 63 days from validation, 9 days slower than Windsor and Maidenhead's median of 54 for extensions. Approved, as 75% of extensions here are.

78%decided within 8 weeks
75%approved
640decided in the last year

Plota live figures for extensions decided by Windsor and Maidenhead in the last twelve months, from validation. Windsor and Maidenhead decision record →

Consultation & key dates

Alt. reference
PP-15064490
Statutory expiry
30 Aug 2026
Env. assessment
No

Historical activity at this location

24 previous applications on record - archival context, not part of the live application.

This property

Previous applications at this address

2025 Refused
First floor side/rear extension, single storey rear extension, alterations to fenestratio…
25/02893/FULL
Within ~100m

Nearby activity

2025 Approved
Mulberry House, Dorney, Eton Wick, Slough, SL4 6NG
Construction of new orangery following demolition of existing conservatory and alteration…
P/04364/025
2025 Approved
Mulberry House, Dorney, Eton Wick, SL4 6NG
Alteration to external fenestration, including removal of existing windows and addition o…
P/04364/026
2022 Approved
49 Tilstone Close Eton Wick Windsor SL4 6NG
Certificate of lawfulness to determine whether the proposed single storey side/rear exten…
22/02832/CPD
2022 Refused
49 Tilstone Close Eton Wick Windsor SL4 6NG
Certificate of lawfulness to determine whether the proposed single storey side/rear exten…
22/02307/CPD
2021 Approved
10 Tilstone Avenue Eton Wick Windsor SL4 6NF
Certificate of lawfulness to determine whether the proposed hip to gable loft conversion…
21/03466/CPD
2021 Approved
52 Tilstone Close Eton Wick Windsor SL4 6NG
Certificate of lawfulness to determine whether the garage conversion is lawful.
21/02218/CPD
2021 Approved
18 Tilstone Close Eton Wick Windsor SL4 6NG
Single storey front and rear extensions, single storey side/rear extension to garage, par…
21/01215/FULL
2020 Approved
21 Tilstone Close Eton Wick Windsor SL4 6NG
Single storey rear/side extension, alteration to fenestration after demolition of existin…
20/01878/FULL
2020 Approved
43 Tilstone Close Eton Wick Windsor SL4 6NG
Single storey front extension.
20/01699/FULL
2020 Approved
43 Tilstone Close Eton Wick Windsor SL4 6NG
Certificate of lawfulness to determine whether the proposed front porch, single storey si…
20/01005/CPD
2020 Refused
43 Tilstone Close Eton Wick Windsor SL4 6NG
Certificate of lawfulness to determine whether the proposed single storey front, side and…
20/00414/CPD
2018 Approved
17 Tilstone Avenue Eton Wick Windsor SL4 6NF
Single storey rear conservatory
18/01852/FULL
2018 Approved
20 Tilstone Close Eton Wick Windsor SL4 6NG
Single storey side extension and alterations to existing conservatory to form rear extens…
18/01735/FULL
2018 Approved
19 Tilstone Close Eton Wick Windsor SL4 6NG
Part single part two storey side/rear extension
18/01239/FULL
2018 Approved
16 Tilstone Close Eton Wick Windsor SL4 6NG
Single storey rear/side extension
18/00827/FULL
2017 Approved
32 Tilstone Close Eton Wick Windsor SL4 6NG
Installation of roof lights, amendment to 16/01359 (Retrospective)
17/03040/FULL
2017 Approved
29 Tilstone Close Eton Wick Windsor SL4 6NG
Construction of an outbuilding (retrospective)
17/00940/FULL
2016 Withdrawn
29 Tilstone Close Eton Wick Windsor SL4 6NG
Detached outbuilding with pitch roof (part retrospective)
16/02876/FULL
2016 Refused
39 Tilstone Close Eton Wick Windsor SL4 6NG
Certificate of lawfulness to determine whether a replacement garage is lawful
16/02762/CPD
2016 Approved
29 Tilstone Close Eton Wick Windsor SL4 6NG
Part single, part two storey side and rear extension
16/02386/FULL
2016 Approved
29 Tilstone Close Eton Wick Windsor SL4 6NG
Single storey rear extension no greater than 6.0m depth, 2.8m high and an eaves height of…
16/01809/PDXL
2016 Approved
12 Tilstone Close Eton Wick Windsor SL4 6NG
Two storey side extension, single storey rear extension and alterations to fenestration f…
16/01138/FULL
2016 Approved
32 Tilstone Close Eton Wick Windsor SL4 6NG
Single storey rear and side extension, alterations and raising of roof to facilitate conv…
16/01359/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