14 Treve Avenue, West Harrow, Harrow, HA1 4AJ

Pending PL/0311/26
Council
Harrow 5.4/10
Date received
2 Feb 2026
Postcode
HA1 4AJ

Description

Single-storey front extension incorporating porch; two-storey side to rear extension; single-storey rear extension; external alterations; bin / cycle storage (demolition of attached garage and rear conservatory); Change of use from single...

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Other new applications on this street

14 Treve Avenue, West Harrow, Harrow, HA1 4AJ

Certificate of Lawful Development (Proposed): Change of use from C3 (Dwelling ho...

PL/0803/26 - 23 Mar 2026

Nearby new applications

170 Whitmore Road, West Harrow, Harrow, HA1 4AQ

Single storey side to rear extension

PL/1126/26 - 23 May 2026

157 Butler Road, West Harrow, Harrow, HA1 4DX

Single storey side extension; external alterations

PL/1230/26 - 23 May 2026

157 Butler Road, West Harrow, Harrow, HA1 4DX

Certificate of Lawful Development (Proposed): Wrap around rear dormer with Julie...

PL/1228/26 - 23 May 2026

48 Roxborough Park, Harrow, HA1 3AY

Vehicle access; Landscaping to front

PL/1370/26 - 23 May 2026

14 Dorchester Avenue, North Harrow, Harrow, HA2 7AY

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

PL/0879/26 - 23 May 2026

30 Merton Road, West Harrow, Harrow, HA2 0AB

Single storey rear extension; external alterations (demolition of rear extension...

PL/1352/26 - 21 May 2026

Historical activity at this location

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

This property

Previous applications at this address

2025 Approved
Single storey front extension incorporating porch; two storey side to rear extension; sin…
PL/2826/25
2025 Approved
Single storey rear extension: 6.00 metres deep, 3.40 metres maximum height and 3.00 metre…
PL/2565/25
Within ~100m

Nearby activity

2025 Approved
54 Merivale Road, West Harrow, Harrow, HA1 4BH
Single storey rear extension: 6.00 metres deep, 2.98 metres maximum height and 2.80 metre…
PL/2133/25
2024 Approved
18 Treve Avenue, West Harrow, Harrow, HA1 4AJ
Single storey rear extension: 6.00 metres deep, 4.00 metres maximum height and 3.00 metre…
PL/1906/24
2023 Approved
9 Treve Avenue, West Harrow, Harrow, HA1 4AL
Single storey rear extension: 6.00 metres deep, 3.00 metres maximum height and 2.90 metre…
P/1414/23/PRIOR
2023 Refused
9 Treve Avenue, West Harrow, Harrow, HA1 4AL
Single storey rear extension: 6.00 metres deep, 3.00 metres maximum height and 2.90 metre…
P/0044/23/PRIOR
2022 Approved
11 Treve Avenue, West Harrow, Harrow, HA1 4AL
Single storey rear extension: 6.00 metres deep, 3.70 metres maximum height and 3.00 metre…
P/1649/22/PRIOR
2021 Approved
32 Treve Avenue, West Harrow, Harrow, HA1 4AJ
Single Storey Rear Extension: 6.00 metres deep, 3.78 metres maximum height, 3.00 metres h…
P/4767/21/PRIOR
2021 Refused
32 Treve Avenue, West Harrow, Harrow, HA1 4AJ
Single Storey Rear Extension: 6.00 metres deep, 3.50 metres maximum height, 3.00 metres h…
P/3018/21/PRIOR
2020 Approved
32 Treve Avenue, Harrow, HA1 4AJ
Single storey rear extension partial garage conversion loft conversion (1 bedroom & 1 bat…
FP/01084/2020
2018 Approved
9 Treve Avenue, Harrow, HA1 4AL
Single storey rear extension conversion of existing garage to habitable space; external a…
P/1069/18
2018 Approved
66 Merivale Road, Harrow, HA1 4BH
Outbuilding at rear (retrospective)
P/2163/18
2018 Approved
13 Treve Avenue, West Harrow, Harrow, HA1 4AL
Single Storey Rear Extension: extending 4 metres beyond the original rear wall, 3 metres…
P/0525/18/PRIOR
2017 Approved
9 Treve Avenue, Harrow, HA1 4AL
Single storey rear extension: extending 6 metres beyond the original rear wall 3 metres m…
P/4074/17/PRIOR
2017 Approved
9 Treve Avenue, Harrow, HA1 4AL
Single storey rear extension first floor side extension and conversion of existing garage…
P/2513/17
2017 Approved
66 Merivale Road, Harrow, HA1 4BH
Outbuilding at rear for use ancillary to ground floor flat
P/1606/17
2017 Withdrawn
Silhouette, 4 Merivale Road, West Harrow, Harrow, HA1 4BH
INVALID - Change of use to D1
P/2378/17
2024 Approved
18 Treve Avenue, West Harrow, Harrow, HA1 4AJ
Single storey front extension incorporating front porch; single storey side to rear exten…
PL/2432/24
2024 Approved
18 Treve Avenue, West Harrow, Harrow, HA1 4AJ
Certificate of Lawful Proposed Development: Alterations to roof to form end gable and rea…
PL/1910/24
2022 Approved
26 Merivale Road, Harrow, HA1 4BH
Certificate of lawful development (proposed): alterations to roof rear dormer; two roofli…
P/0523/22/6049
2022 Approved
32 Treve Avenue, West Harrow, Harrow, HA1 4AJ
Certificate of lawful proposed development (proposed): Single Storey Rear Extension (foll…
P/2148/22
2022 Refused
26 Merivale Road, West Harrow, Harrow, HA1 4BH
CERTIFICATE OF LAWFUL DEVELOPMENT (PROPOSED): Alterations to roof, rear dormer; two roofl…
P/0523/22
2021 Refused
26 Merivale Road, West Harrow, Harrow, HA1 4BH
CERTIFICATE OF LAWFUL DEVELOPMENT (PROPOSED):Alterations to roof, rear dormer with juliet…
P/4735/21
2021 Approved
22 Merivale Road, West Harrow, Harrow, HA1 4BH
CERTIFICATE OF LAWFUL DEVELOPMENT (PROPOSED):Alterations to roof, rear dormer. Insertion…
P/4776/21
2021 Approved
32 Treve Avenue, West Harrow, Harrow, HA1 4AJ
CERTIFICATE OF LAWFUL DEVELOPMENT (PROPOSED):Alterations to roof to form an end gable, re…
P/3008/21
2020 Approved
52 Merivale Road, West Harrow, Harrow, HA1 4BH
CERTIFICATE OF LAWFUL DEVELOPMENT (PROPOSED): Single storey rear extension (demolition of…
P/3326/20
2020 Refused
32 Treve Avenue, West Harrow, Harrow, HA1 4AJ
CERTIFICATE OF LAWFUL DEVELOPMENT (PROPOSED): Alterations and extension to roof to form e…
P/2589/20
Harrow
Planning Authority Score
5.4/10
Average
#125 of 292 councils
Relevant to this application:
Change of use

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