17 Grimsdyke Road, Hatch End, Pinner, Harrow, HA5 4PJ Data via plota.co.uk

Approved PL/1615/26 - Householder
Extensions & alterations
Council
Harrow 4.9/10
Date received
17 Jun 2026
Postcode
HA5 4PJ
Type
Householder

Description

Single storey front extension incorporating porch; single and two storey side and rear extensions; alterations to roof; rooflights in front, rear and both side roof slopes; external alterations (demolition of attached garage) Data via plota.co.uk

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Last checked

Site constraints 2

Air quality management area: Harrow 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 ↗
Also on the record
Inside the Harrow built-up area.
Not affected
Outside flood zones 2 and 3 · 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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Other new applications on this street

18 Apr 2026Refused

92 Grimsdyke Road, Hatch End, Pinner, Harrow, HA5 4PW

Installation of 2m high fence to side boundary

PL/0860/26
23 Mar 2026Pending

8 Grimsdyke Road, Hatch End, Pinner, Harrow, HA5 4PH

Certificate of Lawful Proposed Development: 1.8m brick and wood fence to side

PL/0759/26

Nearby new applications

5 Sept 2026Pending

27 Derwent Avenue, Hatch End, Pinner, Harrow, HA5 4QH

Front porch, Bay window to ground floor front elevation, Relocation of entrance ...

PL/2318/26
3 Sept 2026Pending

8A Derwent Avenue, Hatch End, Pinner, Harrow, HA5 4QJ

Single storey rear extension: 4.50 metres deep, 3.00 metres maximum height and 2...

PL/2315/26
2 Sept 2026Pending

76 Hillview Road, Hatch End, Pinner, Harrow, HA5 4PE

Replace garage door with window in front elevation; Single storey rear extension...

PL/2283/26
26 Aug 2026Pending

91 Hillview Road, Hatch End, Pinner, Harrow, HA5 4PB

Non material amendment to planning permission PL/0656/26 dated 11/06/2026 to all...

PL/2224/26
22 Aug 2026Pending

SILVER HOWE, 14 Oakleigh Road, Hatch End, Pinner, Harrow, HA5 4HB

Variation of condition 2 (approved plans) attached to planning permission PL/165...

PL/2207/26
19 Aug 2026Pending

1-30 LONSDALE CLOSE, 1 1-30 Lonsdale Close, Hatch End, Pinner, HA5 4RY

Electronic Communications Notification: Installation of underground ducting and ...

PL/2198/26

Historical activity at this location

19 previous applications on record - archival context, not part of the live application.

This property

Previous applications at this address

2025 Approved
Certificate of Lawful Proposed Development: Side porch, Two storey rear extension, Altera…
PL/3161/25
2025
Single storey rear extension: 8.00 metres deep, 3.00 metres maximum height and 3.00 metre…
PL/2999/25
Within ~100m

Nearby activity

2022 Approved
5 Grimsdyke Road, Hatch End, Pinner, Harrow, HA5 4PJ
CERTIFICATE OF LAWFUL DEVELOPMENT (PROPOSED): Alterations and extension to roof to form e…
P/2896/22
2022 Refused
5 Grimsdyke Road, Hatch End, Pinner, Harrow, HA5 4PJ
CERTIFICATE OF LAWFUL DEVELOPMENT (PROPOSED): Alterations and extension to roof to form e…
P/2037/22
2022 Approved
5 Grimsdyke Road, Hatch End, Pinner, Harrow, HA5 4PJ
Single Storey Rear Extension: 6.00 metres deep, 3.00 metres maximum height, 2.90 metres h…
P/1308/22/PRIOR
2021 Approved
35 Grimsdyke Road, Hatch End, Pinner, Harrow, HA5 4PJ
Apple (rear boundary): Fell or reduce to monolith Holly x 2 (rear garden): Fell & leave s…
P/1519/21
2020 Approved
37 Grimsdyke Road, Hatch End, Pinner, Harrow, HA5 4PJ
T1 Magnolia (rear garden): Crown reduce by removing 1.5-2m from the height and 1-1.5m fro…
P/3599/20
2019 Approved
19 Grimsdyke Road, Hatch End, Pinner, Harrow, HA5 4PJ
Single storey front extension incorporating replacement front porch; single and two store…
P/1988/19
2019 Approved
19 Grimsdyke Road, Hatch End, Pinner, Harrow, HA5 4PJ
Single Storey Rear Extension: 6 metres deep, 3.205 metres maximum height, 3 metres high t…
P/1066/19/PRIOR
2019 Approved
19 Grimsdyke Road, Pinner, HA5 4PJ
Single storey front extension incorporating replacement front porch; single and two store…
P/0317/19
2019 Refused
19 Grimsdyke Road, Hatch End, Pinner, Harrow, HA5 4PJ
Single Storey Rear Extension: 6 metres deep, 3.205 metres maximum height, 3 metres high t…
P/0322/19/PRIOR
2017 Approved
10 Grimsdyke Road, Pinner, HA5 4PH
Single storey rear extension (demolition of conservatory)
P/5545/17
2017 Approved
10 Grimsdyke Road, Pinner, HA5 4PH
Single storey rear extension: extending 6 metres beyond the original rear wall 3.9 Metres…
P/1721/17/5246
2017 Approved
10 Grimsdyke Road, Pinner, HA5 4PH
Single storey rear extension: extending 6 metres beyond the original rear wall 3.9 Metres…
P/1721/17/PRIOR
2016 Approved
15 Grimsdyke Road, Pinner, HA5 4PJ
First floor side extension; rooflight in rear roofslope
P/5790/16
2016 Approved
York House, Grimsdyke Road, Pinner, HA5 4PH
Redevelopment for a three storey building to provide two offices on ground floor level an…
P/5627/16
2016 Approved
7 Grimsdyke Road, Pinner, HA5 4PJ
Certificate of lawful development (proposed): alterations to roof to form end gable and r…
P/1756/16
2016 Approved
23 Grimsdyke Road, Pinner, HA5 4PJ
First floor side to rear extension; rear dormer; rooflights in front and both side roofsl…
P/1723/16
2016 Approved
23 Grimsdyke Road, Pinner, HA5 4PJ
First floor side to rear extension; rear dormer; rooflights in front and both side roofsl…
P/0378/16
Harrow
Planning Authority Score
4.9/10
Below average
#153 of 296 councils
Relevant to this application:
Householder decisions

Harrow ranks #115 out of 296 councils for householder decision speed. Harrow is also one of the strictest councils - it refuses more householder applications than almost any other, with only 83% approved vs 90% nationally.

One of the strictest councils
only 83% approved vs 90% nationally
These figures are council-wide context, not a prediction for this application. View full council performance
Harrow decision statistics
Based on MHCLG data, the year to March 2026
78%
Overall approval rate
Below avg (87%) #273 of 296
83%
Householder approved
Below avg (90%) #261 of 296
71%
Decided in 8 weeks
Above avg (63%) #115 of 296
33%
Extended time limit
Below avg (41%) #77 of 296
44%
Minor dwellings approved
133 decided (1-9 homes)
80%
Major dwellings approved
5 decided (10+ homes)
38%
Change of use approved
26 decided
1,330
Total decisions
298 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings