2 Colne Bank Horton Slough SL3 9PG Data via plota.co.uk

26/00609/CPD - Cert of Lawfulness of Proposed Dev Approved

Proposal

Certificate of lawfulness to determine whether the proposed change of use from a single dwellinghouse (Class C3) to a House in Multiple Occupation (6 bedroom) (Class C4) with 1no. first floor side window and 2no. ground floor side windows are lawful. Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
6 Mar 2026
✓
Approved
30 Apr 2026

Approved on 30 Apr 2026 · Delegated · Last checked 7 Jul 2026

Site constraints 9

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. Some green belt land can count as grey belt, where it does not strongly serve the green belt's purposes. The council decides this in its green belt assessment or on each application, so we do not mark it here.
Read the government guidance ↗
Local nature reserve about 99 m away: Arthur Jacob Nature Reserve
Work nearby can need a habitats assessment.
Harm to a protected site is only accepted where there is no alternative and an overriding public interest.
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
SSSI about 218 m away: Wraysbury Reservoir SSSI; National infrastructure project about 1975 m away: M4 Junctions 3 to 12 Smart Motorway; Inside the Horton (Windsor and Maidenhead) built-up area; Flood defence about 46 m from the postcode pin (engineered high ground, designed for a 1 in 5 year flood); Air quality management area about 99 m away: Spelthorne AQMA; Natural England's Provisional ALC map (1:250,000, 1970s) had this area as grade 3, 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 scheduled monument at the site

Checked on 6 October 2026. The pin for this application is the centre of its postcode rather than the building, so distances to nearby designations are measured from the postcode and can be out by the width of the postcode area. Historic England, the Environment Agency, Natural England, the Planning Inspectorate 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.

Sales history 2

Last sold for £622,000 in February 2026. Semi-detached house, freehold.

16 February 2026£622,000Recorded as a transfer outside a standard sale
15 December 2017£492,000

Sale prices from HM Land Registry's price paid record, matched to this application by its address.

Building

Floor area156 m² (1,679 sq ft)
Energy ratingC (71 out of 100), could reach B
PropertySemi-detached house, 6 habitable rooms
Built1930 to 1949
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in September 2026, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate

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Important details

Application type
Cert of Lawfulness of Proposed Dev
Postcode
SL3 9PG
Received
6 Mar 2026
Validated
6 Mar 2026
Ward
Datchet Horton And Wraysbury
Parish
Horton Parish
Case officer
Show
Target decision
1 May 2026
Decision
Permitted Development
Decision date
30 Apr 2026
Decision level
Delegated
Applicant
Show
Freehold owner
Show

How this decision compares

Decided in 55 days from validation, about the council's usual 55 days. Approved, as 64% of changes of use here are.

62%decided within 8 weeks
64%approved
78decided in the last year

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

Consultation & key dates

Alt. reference
PP-14758229
Planning Portal ref
PP-14758229
Statutory expiry
1 May 2026
Env. assessment
No
Windsor and Maidenhead
Planning Authority Score
5.3/10
Average
#135 of 296 councils
Relevant to this application:
Change of use

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

Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.

Freehold owner: Information produced by HM Land Registry. © Crown copyright 2026. Source: HM Land Registry, UK and overseas companies that own property in England and Wales, September 2026 release.