13 Masson Avenue Ruislip Data via plota.co.uk

57259/APP/2026/1839 Approved
Extensions & alterations

Proposal

Conversion of roof to habitable space including a hip to gable end extension, rear dormer, 1 front rooflight, 1 gable end window and Juliette balcony. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
24 Jul 2026
✓
Approved
21 Sept 2026

Approved on 21 Sept 2026 · Last checked 22 Sept 2026

Documents

View the documents on the council's website ↗

Site constraints 7

Article 4 direction
Residential extensions. Named permitted development rights are withdrawn here.
An Article 4 direction withdraws particular permitted development rights, so work that would normally need no application needs one here. Not every council has published its directions.
Air quality management area: Hillingdon AQMA
The council has declared the area as failing an air quality objective.
Schemes that add traffic, parking or combustion plant are assessed against the area's action plan and may need an air quality assessment.
Council record ↗
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
Local nature reserve about 377 m away: Islip Manor; Inside the Hillingdon built-up area; Public transport access: PTAL 2 (poor), TfL 2023, for the 100 m square; Green belt about 40 m away: London.
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, Transport for London (public transport access levels, Powered by TfL Open Data, OGL v3.0, contains OS data © Crown copyright and database right 2025) 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
Hillingdon
Postcode
HA4 6QU
Received
24 Jul 2026
Validated
24 Jul 2026
Ward
SOUTH RUISLIP 2022
Case officer
Show
Target decision
18 Sept 2026
Decision
Approval
Decision date
21 Sept 2026
Agent
Fiza Mubarik

How this decision compares

Decided in 59 days from validation, 5 days slower than Hillingdon's median of 54 for extensions. Approved, as 92% of extensions here are.

66%decided within 8 weeks
92%approved
1,186decided in the last year

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

Consultation & key dates

Consultation
4 Aug 2026
Comments by
25 Aug 2026

Historical activity at this location

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

Within ~100m

Nearby activity

2024 Approved
8 MASSON AVENUE RUISLIP HA4 6QU
Erection of a single storey extension to the rear following the demolition of the existin…
78931/APP/2024/1970
2024 Approved
26A WALNUT WAY RUISLIP HA4 6TD
Erection of Outbuilding to the rear.
78884/APP/2024/1749
2022 Approved
20 MASSON AVENUE RUISLIP HA4 6QU
Erection of single storey rear and front porch extensions
77099/APP/2022/639
2019 Approved
12 WALNUT WAY RUISLIP HA4 6TD
Removal of condition 6 (Lifetime Homes) of planning permission Ref: 68425/APP/2012/659 da…
68425/APP/2019/2077
2019 Approved
12 WALNUT WAY RUISLIP HA4 6TD
Details pursuant to condition 8 (sustainable homes) of planning permission Ref: 68425/APP…
68425/APP/2019/2133
2018 Approved
2 WALNUT WAY RUISLIP HA4 6TD
Two storey side extension and single storey rear extension
73622/APP/2018/800
2017 Refused
31 MASSON AVENUE RUISLIP HA4 6QT
Removal of condition 5 (Side windows) of planning permission Ref: 71974/APP/2016/2191 dat…
71974/APP/2017/2182
2017 Refused
31 MASSON AVENUE RUISLIP HA4 6QT
Application for a non-material amendment to planning permission Ref: 71974/APP/2016/2191…
71974/APP/2017/1513
2016 Approved
31 MASSON AVENUE RUISLIP HA4 6QT
Part two storey, part single storey side/rear extension and conversion of roofspace to ha…
71974/APP/2016/2191
Hillingdon
Planning Authority Score
3.5/10
Below average
#219 of 296 councils
Relevant to this application:
Householder decisions

Hillingdon ranks #194 out of 296 councils for householder decision speed. Householder applications are slightly more likely to be approved here (90%) than the national average (90%).

These figures are council-wide context, not a prediction for this application. View full council performance
Hillingdon decision statistics
Based on MHCLG data, the year to March 2026
85%
Overall approval rate
Below avg (87%) #208 of 296
90%
Householder approved
Above avg (90%) #191 of 296
58%
Decided in 8 weeks
Below avg (63%) #194 of 296
45%
Extended time limit
Above avg (41%) #190 of 296
61%
Minor dwellings approved
67 decided (1-9 homes)
65%
Change of use approved
17 decided
1,680
Total decisions
255 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings