26 Lawn Close Datchet Slough SL3 9JZ Data via plota.co.uk

26/01517/FULL - Full Refused

Proposal

New front porch, part single part two storey side/rear extension, hip to gable roof alteration, 1 no. rear dormer and alterations to fenestration following demolition of existing elements. Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
19 Jun 2026
✓
Validated
30 Jul 2026
✗
Refused
15 Sept 2026
Appeal
Not lodged

Refused on 15 Sept 2026 · Delegated · Last checked 15 Sept 2026

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 ↗
National infrastructure project 169 m away: M4 Junctions 3 to 12 Smart Motorway
The site is 169 m from the project boundary. Highway, decided. The project page says whether consent was granted. Also within 2 km: Expansion of Heathrow Airport (Third Runway) (at pre-application, 226 m).
Nationally significant infrastructure projects (power stations, electricity lines, pipelines, major roads and railways, harbours, airports and reservoirs) are consented by a Secretary of State under the Planning Act 2008, after an examination by the Planning Inspectorate, rather than by the council. The boundary is the one the Inspectorate consults on and can change as the scheme does. Projects are shown within 2 km of the site.
Planning Inspectorate project page ↗
Also on the record
1 listed building within 150 m; Inside the Datchet built-up area.
Not affected
Not green belt · No scheduled monument at the site

Checked on 6 October 2026. 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.

Building

Floor area107 m² (1,152 sq ft)
Energy ratingD (61 out of 100), could reach C
PropertySemi-detached house, 5 habitable rooms
Built1900 to 1929
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in February 2026, the latest held for this property. The building may have changed since. View the certificate

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Important details

Application type
Full
Postcode
SL3 9JZ
Received
19 Jun 2026
Validated
30 Jul 2026
Ward
Datchet Horton And Wraysbury
Parish
Datchet Parish
Case officer
Show
Target decision
23 Sept 2026
Decision
Refuse
Decision date
15 Sept 2026
Decision level
Delegated
Applicant
Show
Agent
Planit Studio

How this decision compares

Decided in 47 days from validation, 7 days faster than Windsor and Maidenhead's median of 54 for demolitions. Refused, as 25% of demolitions here are.

77%decided within 8 weeks
75%approved
198decided in the last year

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

Consultation & key dates

Alt. reference
PP-15015440
Planning Portal ref
PP-15015440
Comments by
30 Aug 2026
Statutory expiry
23 Sept 2026
Env. assessment
No
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

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.