20 Derby Avenue, Harrow Weald, Harrow, HA3 5JU

Pending PL/1116/26 - Prior Notification - Larger Home Extension
Extensions & alterations
Council
Harrow 5.4/10
Date received
28 Apr 2026
Postcode
HA3 5JU
Type
Prior Notification - Larger Home Extension

Description

Single storey rear extension: 6.00 metres deep, 3.00 metres maximum height and 3.00 metres high to the eaves

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PL/0824/26 - 23 May 2026

11 Mead Close, Harrow Weald, Harrow, HA3 5JN

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PL/1173/26 - 23 May 2026

Flat 1, 365 High Road, Harrow Weald, Harrow, HA3 5EQ

Certificate of Lawful Development (Proposed): Single storey side extension (Remo...

PL/0977/26 - 23 May 2026

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Installation of extract flue at rear (Retrospective)

PL/0883/26 - 23 May 2026

45 Athelstone Road, Harrow Weald, Harrow, HA3 5NX

Single storey rear extension: 6.00 metres deep, 3.00 metres maximum height and 2...

PL/1378/26 - 21 May 2026

101 Toorack Road, Harrow Weald, Harrow, HA3 5HS

Certificate of lawful development (proposed): Single storey rear extension

PL/1140/26 - 14 May 2026

Historical activity at this location

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

Within ~100m

Nearby activity

2025 Approved
3 Stox Mead, Harrow Weald, Harrow, HA3 5JX
Single storey rear extension: 6.00 metres deep, 2.80 metres maximum height and 2.80 metre…
PL/0943/25
2025 Approved
9 Stox Mead, Harrow Weald, Harrow, HA3 5JX
Single storey rear extension: 6.00 metres deep, 3.00 metres maximum height and 3.00 metre…
PL/0099/25
2024 Refused
40 Clewer Crescent, Harrow Weald, Harrow, HA3 5PZ
Detached single storey outbuilding for use as Gym (Retrospective)
PL/2920/24
2023 Approved
30 Stanhope Avenue, Harrow Weald, Harrow, HA3 5JW
Single storey rear extension
PL/0758/23
2023 Approved
4 Derby Avenue, Harrow Weald, Harrow, HA3 5JU
Proposed vehicle access; hardsurgacing to front garden
P/0661/23
2022 Approved
34 Stanhope Avenue, Harrow Weald, Harrow, HA3 5JW
Single storey rear extension; external alterations (demolition of conservatory)
P/2155/22
2022 Refused
4 Derby Avenue, Harrow Weald, Harrow, HA3 5JU
Proposed vehicle access
P/1694/22
2022 Approved
10 Derby Avenue, Harrow Weald, Harrow, HA3 5JU
Single storey rear extension: 4.50 metres deep, 3.50 metres maximum height and 2.77 metre…
P/1640/22/PRIOR
2022 Approved
34 Stanhope Avenue, Harrow Weald, Harrow, HA3 5JW
Single storey rear extension: 6.00 metres deep, 4.00 metres maximum height and 3.00 metre…
P/1574/22/PRIOR
2022 Approved
26 Stanhope Avenue, Harrow Weald, Harrow, HA3 5JW
Single storey rear extension: 6.00 metres deep, 3.67 metres maximum height and 3.00 metre…
P/1498/22/PRIOR
2022 Approved
54 Clewer Crescent, Harrow Weald, Harrow, HA3 5PZ
Single storey rear extension: 6.00 metres deep, 3.00 metres maximum height and 3.00 metre…
P/0567/22/PRIOR
2021 Approved
2 Stanhope Avenue, Harrow Weald, Harrow, HA3 5JW
Single storey side to rear extension; external alterations (demolition of rear extension)
P/4778/21
2021 Approved
6 Clewer Crescent, Harrow, HA3 5PZ
Single storey rear conservatory extension
P/1409/21/5945
2021 Approved
2 Stanhope Avenue, Harrow Weald, Harrow, HA3 5JW
Single Storey Rear Extension: 6.00 metres deep, 3.40 metres maximum height, 3.00 metres h…
P/3762/21/PRIOR
2021 Refused
6 Clewer Crescent, Harrow Weald, Harrow, HA3 5PZ
Single storey rear conservatory extension
P/1409/21
2021 Approved
26 Stanhope Avenue, Harrow Weald, Harrow, HA3 5JW
Single storey rear extension: 4.00 metres deep, 3.00 metres maximum height and 2.80 metre…
P/1330/21/PRIOR
2020 Withdrawn
26 Stanhope Avenue, Harrow Weald, Harrow, HA3 5JW
Single storey rear extension
P/3261/20
2020 Approved
26 Clewer Crescent, Harrow Weald, Harrow, HA3 5PZ
Single and two storey side extension; first floor rear extension; external alterations
P/2648/20
2020 Approved
30 Stanhope Avenue, Harrow Weald, Harrow, HA3 5JW
Single storey rear extension; external alterations
P/0674/20
2019 Refused
26 Clewer Crescent, Harrow Weald, Harrow, HA3 5PZ
Single and two storey side extension; first floor rear extension; external alterations
P/5230/19
2018 Approved
82 Clewer Crescent, Harrow, HA3 5PZ
Single storey rear extension extending 6 metres beyond the original rear wall 3 metres ma…
P/2407/18/PRIOR
2017 Approved
64 Clewer Crescent, Harrow, HA3 5PZ
Single storey rear extension (demolition of garage)
P/0935/17
2016 Approved
1 Derby Avenue, Harrow, HA3 5JU
Two storey side extension
P/3940/16
2016 Approved
7 Derby Avenue, Harrow, HA3 5JU
Single storey rear extension: extending 4 metres beyond the original rear wall 3.090 Metr…
P/4112/16
2016 Approved
7 Derby Avenue, Harrow, HA3 5JU
Single storey rear extension: extending 6 metres beyond the original rear wall 3.090 Metr…
P/3656/16
Harrow
Planning Authority Score
5.4/10
Average
#125 of 292 councils
Relevant to this application:
Householder decisions

Harrow is faster than most councils at deciding householder applications, ranking #88 out of 292. 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 performance
Based on MHCLG data, 2025
78%
Overall approval rate
Below avg (87%) #270 of 292
83%
Householder approved
Below avg (90%) #255 of 292
74%
Decided in 8 weeks
Above avg (64%) #88 of 292
31%
Extended time limit
Below avg (40%) #60 of 292
49%
Minor dwellings approved
136 decided (1-9 homes)
100%
Major dwellings approved
4 decided (10+ homes)
54%
Change of use approved
24 decided
1,316
Total decisions
287 refused in 2025
Source: MHCLG planning statistics · See full council rankings