133 Courtenay Avenue, Harrow Weald, Harrow, HA3 6LJ Data via plota.co.uk

Decided PL/1843/26 - Prior Notification - Larger Home Extension
Extensions & alterations
Council
Harrow 4.9/10
Date received
17 Jul 2026
Postcode
HA3 6LJ
Type
Prior Notification - Larger Home Extension

Description

Single storey rear extension: 5.00 metres deep, 3.30 metres maximum height and 3.00 metres high to the eaves Data via plota.co.uk

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Last checked

Site constraints 3

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 ↗
Habitat network: Priority Rivers
Where habitat is joined up enough to work as a network. Context, not a constraint on its own.
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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Nearby new applications

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5 Clewer Crescent, Harrow Weald, Harrow, HA3 5QA

Certificate of Lawful Development (Existing): Single storey rear extension; exte...

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Single storey front extension incorporating front porch single and first floor s...

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22 Jul 2026Pending

129 Long Elmes, Harrow Weald, Harrow, HA3 5LB

First floor side to rear extension; single and two storey rear extension

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21 Jul 2026Approved

129 Long Elmes, Harrow Weald, Harrow, HA3 5LB

Certificate of Lawful Development (Proposed): Alterations and extension to roof ...

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17 Jul 2026Approved

55 Rowlands Avenue, Hatch End, Pinner, Harrow, HA5 4DF

Single storey rear extension; external alterations

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15 Jul 2026Approved

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Historical activity at this location

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

Within ~100m

Nearby activity

2024 Approved
118 Courtenay Avenue, Harrow Weald, Harrow, HA3 6LN
Single storey rear extension: 4.00 metres deep, 3.05 metres maximum height and 2.95 metre…
PL/1953/24
2024 Approved
118 Courtenay Avenue, Harrow Weald, Harrow, HA3 6LN
Certificate of Lawful Proposed Development: Alterations to roof to form rear dormer, inst…
PL/1967/24
2024 Refused
161 Courtenay Avenue, Harrow Weald, Harrow, HA3 6LJ
Single storey rear extension: 6.00 metres deep, 3.30 metres maximum height and 2.40 metre…
PL/1171/24
2024 Refused
161 Courtenay Avenue, Harrow Weald, Harrow, HA3 6LJ
Single storey rear extension: 6.00 metres deep, 3.30 metres maximum height and 2.40 metre…
PL/0675/24/PRIOR
2023 Approved
155 Courtenay Avenue, Harrow Weald, Harrow, HA3 6LJ
Front porch; single storey rear extension; attached outbuilding for use as utilities stor…
P/1063/23
2022 Refused
155 Courtenay Avenue, Harrow Weald, Harrow, HA3 6LJ
Front porch; single storey rear extension; attached outbuilding for use as utilities stor…
P/3746/22
2019 Approved
105 Courtenay Avenue, Harrow Weald, Harrow, HA3 6LJ
Single Storey Rear Extension: 6 metres deep, 3 metres maximum height, 3 metres high to th…
P/5095/19/PRIOR
2021 Approved
130 Courtenay Avenue, Harrow Weald, Harrow, HA3 6LN
CERTIFICATE OF LAWFUL DEVELOPMENT (PROPOSED):Alterations to roof, rear dormer window and…
P/2928/21
2021 Approved
130 Courtenay Avenue, Harrow Weald, Harrow, HA3 6LN
Single storey rear extension: 6.00 metres deep, 3.41 metres maximum height and 2.75 metre…
P/2953/21/PRIOR
2020 Approved
131 Courtenay Avenue, Harrow Weald, Harrow, HA3 6LJ
CERTIFICATE OF LAWFUL DEVELOPMENT (PROPOSED): Single storey rear extension
P/1707/20
2019 Refused
105 Courtenay Avenue, Harrow Weald, Harrow, HA3 6LJ
Single Storey Rear Extension: 6 metres deep, 3 metres maximum height, 3 metres high to th…
P/4976/19/PRIOR
2019 Refused
155 Courtenay Avenue, Harrow Weald, Harrow, HA3 6LJ
Single Storey Rear Extension: 6 metres deep, 4 metres maximum height, 2.5 metres high to…
P/2178/19/PRIOR
2019 Refused
155 Courtenay Avenue, Harrow Weald, Harrow, HA3 6LJ
Single Storey Rear Extension: 6 metres deep, 4 metres maximum height, 2.5 metres high to…
P/1652/19/PRIOR
2019 Refused
155 Courtenay Avenue, Harrow Weald, Harrow, HA3 6LJ
Single Storey Rear Extension: 6 metres deep, 4 metres maximum height, 2.500 metres high t…
P/1154/19/PRIOR
2019 Approved
161 Courtenay Avenue, Harrow Weald, Harrow, HA3 6LJ
Certificate of lawful development (proposed): Alterations to roof to form end gable and r…
P/0561/19
2018 Approved
161 Courtenay Avenue, Harrow, HA3 6LJ
Single storey rear extension: 6 metres deep 3.4 Metres maximum height 3 metres high to th…
P/4710/18/PRIOR
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