18 Diamond Road Ruislip HA4 0PG Data via plota.co.uk

80128/APP/2026/1465 Approved
Extensions & alterationsSolar & renewables

Proposal

Conversion of roof space to habitable use to include a rear dormer with Juliette balcony, 1 x front roof light and conversion of roof from hip to gable end, erection of outbuilding to rear garden, and installation of air source heat pump. (Application for a Certificate of Lawful Development for a Proposed Development) Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
15 Jun 2026
✓
Approved
7 Aug 2026

Approved on 7 Aug 2026 · Last checked 10 Aug 2026

Documents

View the documents on the council's website ↗

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 ↗
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 Named permitted development rights are withdrawn here.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.
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
Inside the Hillingdon built-up area.
Not affected
Not green belt · 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.

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Important details

Council
Hillingdon
Postcode
HA4 0PG
Received
15 Jun 2026
Validated
15 Jun 2026
Decision
Approval
Decision date
7 Aug 2026

How this decision compares

Decided in 53 days from validation, about the council's usual 53 days. Approved, as 91% of extensions here are.

66%decided within 8 weeks
91%approved
854decided in the last year

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

Historical activity at this location

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

Within ~100m

Nearby activity

2025 Approved
50 DIAMOND ROAD RUISLIP HA4 0PG
Erection of a single storey rear extension (Retrospective Planning Application)
77923/APP/2025/2146
2025 Approved
60 DIAMOND ROAD RUISLIP HA4 0PG
Erection of a single-storey rear extension and creation of a new patio
79495/APP/2025/1432
2025 Approved
59 DIAMOND ROAD RUISLIP HA4 0PD
Amendments to fenestration consisting of the removal of existing rear window and installa…
79428/APP/2025/1102
2025 Approved
LIDL FOODSTORE VICTORIA ROAD RUISLIP HA4 0JJ
Details part pursuant to the discharge of Condition 5 (Contamination) (parts 5c (iii) and…
5039/APP/2025/562
2024 Approved
LIDL FOODSTORE VICTORIA ROAD RUISLIP HA4 0JJ
Details pursuant to the discharge of Condition 5(a)-(b) and part discharge of Condition 5…
5039/APP/2024/2086
2024 Approved
LIDL FOODSTORE VICTORIA ROAD RUISLIP HA4 0JJ
Details pursuant to condition 4 (landscaping) of planning permission reference 5039/APP/2…
5039/APP/2024/2114
2024 Approved
LIDL FOODSTORE VICTORIA ROAD RUISLIP HA4 0JJ
Non-material amendment to planning permission 5039/APP/2024/1316 dated 30th July 2024 for…
5039/APP/2024/2283
2022 Approved
LIDL FOODSTORE VICTORIA ROAD RUISLIP HA4 0JJ
Details pursuant to the discharge of Conditions 5 (Landscape Scheme), 11 (Flood Risk Asse…
5039/APP/2022/3215
2024 Approved
LIDL FOODSTORE VICTORIA ROAD RUISLIP HA4 0JJ
Extension and reconfiguration of existing car park to include landscaping, following the…
5039/APP/2024/1316
2024 Approved
LIDL FOODSTORE VICTORIA ROAD RUISLIP HA4 0JJ
External alterations to the building involving the installation of automated sliding door…
5039/APP/2024/1313
2022 Approved
LIDL FOODSTORE VICTORIA ROAD RUISLIP HA4 0JJ
Details in compliance with Conditions 6 (Revised Cyclist Provision Details), 7 (Revised D…
5039/APP/2022/2595
2022 Approved
LIDL FOODSTORE VICTORIA ROAD RUISLIP HA4 0JJ
Details pursuant to the discharge of Conditions 6 (electric vehicle rapid charging point)…
5039/APP/2022/944
2021 Approved
28 JUBILEE DRIVE RUISLIP HA4 0PQ
Conversion of roof space to habitable use to include a rear dormer and 2 front roof light…
76561/APP/2021/2784
2021 Approved
28 JUBILEE DRIVE RUISLIP HA4 0PQ
Erection of a single storey rear extension, which would extend beyond the rear wall of th…
76561/APP/2021/2639
2021 Approved
VICTORIA ROAD SW VICTORIA ROAD RUISLIP HA4 0JJ
Proposed 15m Phase 8 Street Pole with wrap around cabinet at base, 3 cabinets and associa…
75738/APP/2021/1059
2021 Approved
76 JUBILEE DRIVE RUISLIP MIDDLESEX HA4 0PQ
Conversion of roofspace to habitable use to include a rear dormer, 2 x front rooflights…
63241/APP/2021/883
2019 Approved
58 JUBILEE DRIVE RUISLIP HA4 0PQ
Erection of a single storey rear extension, which would extend beyond the rear wall of th…
2440/APP/2019/658
2019 Refused
58 JUBILEE DRIVE RUISLIP HA4 0PQ
Erection of a single storey rear extension, which would extend beyond the rear wall of th…
2440/APP/2019/60
2018 Approved
8 DIAMOND ROAD RUISLIP HA4 0PG
Single storey rear extension (Part Retrospective)
73431/APP/2018/1910
2017 Withdrawn
LAND COMPRISING THE FORMER IMPERIAL HOUSE VICTORIA ROAD RUISLIP HA4 0JJ
Variation of conditions 3 (Supporting plans and/or documents) and 20 (No more than 2 deli…
5039/APP/2017/4163
2017 Approved
8 DIAMOND ROAD RUISLIP HA4 0PG
Erection of a single storey rear extension, which would extend beyond the rear wall of th…
73431/APP/2018/7
2017 Approved
38 DIAMOND ROAD RUISLIP HA4 0PG
Single storey rear extension
71422/APP/2017/1515
2017 Approved
11 DIAMOND ROAD RUISLIP HA4 0PF
Erection of a single storey rear extension, which would extend beyond the rear wall of th…
72740/APP/2017/1232
2017 Refused
38 DIAMOND ROAD RUISLIP HA4 0PG
Single storey rear extension
71422/APP/2017/569
2016 Approved
24 JUBILEE DRIVE RUISLIP HA4 0PG
Single storey outbuilding to rear for use as a games room
69339/APP/2016/1745
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