13a, St. Marys Road, Slough, SL3 7EN Data via plota.co.uk

P/03345/003 - Full Planning Refused

Proposal

Construction of a two storey rear extension, raising existing roof ridge height and a loft conversion with rear dormer and front roof lights Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
12 May 2026
✓
Consultation
12 May 2026
✗
Refused
29 Jul 2026
Appeal
Not lodged

Refused on 29 Jul 2026 · Delegated · Last checked 29 Jul 2026

Site constraints 4

St Mary's Church, Langley conservation area
Demolition needs planning permission and permitted development is restricted.
The council must give weight to preserving or enhancing the area's character and appearance. Not every council has published its boundaries as open data.
Council document ↗
9 listed buildings within 150 m of the postcode pin
Nearest: 12, 14, 16, 18, 20, 22, St Marys Road, Grade II*, about 50 m from the postcode pin · 1 Grade I, 2 Grade II*, 6 Grade II
The site itself is not listed. Listed building consent is needed for work that affects the special interest of a listed building, inside or out, on top of planning permission. Setting can be a consideration for buildings nearby; there is no fixed radius.
Show all 9 with distances
Historic England ↗
Also on the record
National infrastructure project about 1602 m away: M4 Junctions 3 to 12 Smart Motorway; Inside the Slough built-up area.
Not affected
Outside flood zones 2 and 3 · Not green belt · 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 £435,000 in December 2014. Detached house, freehold.

8 December 2014£435,000
18 October 2005£342,000

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

Building

Floor area121 m² (1,302 sq ft)
Energy ratingC (71 out of 100), could reach B
PropertyDetached house, 6 habitable rooms
Built1967 to 1975
HeatingBoiler and radiators, mains gas
WallsCavity wall, filled cavity

From the energy performance certificate lodged in September 2014, 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

Council
Slough
Application type
Full Planning
Postcode
SL3 7EN
Received
12 May 2026
Validated
12 May 2026
Ward
Langley St. Marys
Case officer
Show
Target decision
7 Jul 2026
Decision
Refused; Informatives
Decision date
29 Jul 2026
Decision level
Delegated
Applicant
Show
Agent
H-JAG Architecture

How this decision compares

Decided in 78 days from validation, 25 days slower than Slough's median of 53 for extensions. Refused, as 19% of extensions here are.

66%decided within 8 weeks
81%approved
462decided in the last year

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

Consultation & key dates

Alt. reference
PP-14927507
Site or press notice
12 May 2026
Statutory expiry
19 Aug 2026
Slough
Planning Authority Score
2.4/10
Poor
#260 of 296 councils
Relevant to this application:
Householder decisions

Slough is slower than most councils at deciding householder applications, ranking #263 out of 296. Slough is also one of the strictest councils - it refuses more householder applications than almost any other, with only 82% approved vs 90% nationally.

One of the strictest councils
only 82% approved vs 90% nationally
These figures are council-wide context, not a prediction for this application. View full council performance
Slough decision statistics
Based on MHCLG data, the year to March 2026
78%
Overall approval rate
Below avg (87%) #275 of 296
82%
Householder approved
Below avg (90%) #269 of 296
42%
Decided in 8 weeks
Below avg (63%) #263 of 296
39%
Extended time limit
Below avg (41%) #142 of 296
60%
Minor dwellings approved
48 decided (1-9 homes)
50%
Major dwellings approved
4 decided (10+ homes)
40%
Change of use approved
47 decided
617
Total decisions
137 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.