22 Thistledene Avenue, South Harrow, Harrow, HA2 9HL Data via plota.co.uk

Pending PL/1940/26 - Full Planning Application
Change of useExtensions & alterationsNew homes
Council
Harrow 4.9/10
Date received
22 Jul 2026
Postcode
HA2 9HL
Type
Full Planning Application

Description

Conversion of dwellinghouse into two flats (1 x 1 bed & 1 x 2 beds); first floor rear extension; external alterations Data via plota.co.uk

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Last checked

Decision outlook

Plota predicts a decision around 16 Sept 2026, from recent full applications across the UK.

Day 54 of the 56-day target. Councils usually decide full applications by day 56.

Day 542 days to the 56-day target
61%decided within 8 weeks
87%approved
54,582decided in the last year

Plota live figures for full applications decided across the UK in the last twelve months, from validation; too few recent full applications in Harrow to go on. Harrow decision record →

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: 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 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

11 Sept 2026Pending

24 Leamington Crescent, South Harrow, Harrow, HA2 9HQ

Single storey rear extension: 6.00 metres deep, 3.00 metres maximum height and 3...

PL/2381/26
10 Sept 2026Pending

99 Kings Road, South Harrow, Harrow, HA2 9LD

Single storey rear extension: 4.00 metres deep, 3.295 metres maximum height and ...

PL/2360/26
9 Sept 2026Pending

51 Kings Road, South Harrow, Harrow, HA2 9JA

First-floor side and rear extension, including extension of the existing hipped ...

PL/2337/26
3 Sept 2026Pending

574 FIELD END ROAD RUISLIP

Erection of a single storey extension to the rear, conversion of roof space to h...

16992/APP/2026/2143
12 Aug 2026Pending

49 Warwick Avenue, South Harrow, Harrow, HA2 8RE

Front porch and canopy; Single storey side to rear extension; Installation of Ai...

PL/2085/26
8 Aug 2026Pending

81 Kings Road, South Harrow, Harrow, HA2 9JG

Proposed boundary wall with metal grills and metal gates to front

PL/2080/26

Historical activity at this location

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

Within ~100m

Nearby activity

2024 Approved
28 Thistledene Avenue, South Harrow, Harrow, HA2 9HL
Single storey rear extension
PL/0195/24
2023 Approved
129 Leamington Crescent, South Harrow, Harrow, HA2 9HJ
Single Storey Rear Extension: 6.00 metres deep, 3.86 metres maximum height, 3.00 metres h…
P/2508/23/PRIOR
2022 Approved
695 FIELD END ROAD RUISLIP HA4 0RH
Installation of a drop kerb for new driveway
77288/APP/2022/2833
2022 Approved
,
Single storey rear extension: 4.30 metres deep, 3.75 metres maximum height and 3.00 metre…
P/3077/22/PRIOR
2022 Approved
127 Leamington Crescent, South Harrow, Harrow, HA2 9HJ
Single storey rear extension: 5.00 metres deep, 3.50 metres maximum height and 3.00 metre…
P/2916/22/PRIOR
2022 Refused
,
Single storey rear extension: 4.30 metres deep, 3.90 metres maximum height and 3.00 metre…
P/2584/22/PRIOR
2022 Withdrawn
695 FIELD END ROAD RUISLIP HA4 0RH
Drop kerb for new driveway
77288/APP/2022/1641
2021 Approved
231 Malvern Avenue, South Harrow, Harrow, HA2 9HF
Single Storey Rear Extension: 5.00 metres deep, 3.67 metres maximum height, 3.00 metres h…
P/4958/21/PRIOR
2021 Approved
,
Single storey side to rear extension; external alterations (Demolition of detached garage)
P/3241/21
2021 Approved
,
Single Storey Rear Extension: 6.00 metres deep, 2.98 metres maximum height, 2.98 metres h…
P/3657/21/PRIOR
2021 Withdrawn
,
Single Storey Rear Extension: extending 6.00 metres beyond the original rear wall, 3.15 m…
P/3447/21/PRIOR
2021 Approved
91 Leamington Crescent, South Harrow, Harrow, HA2 9HJ
Single Storey Rear Extension: 5.80 metres deep, 3.40 metres maximum height, 2.94 metres h…
P/2788/21/PRIOR
2021 Refused
,
Single and two storey side extension; single storey rear extension; installation of one r…
P/2260/21
2020 Refused
91 Leamington Crescent, South Harrow, Harrow, HA2 9HJ
Single Storey Rear Extension: 6.0 metres deep, 3.40 metres maximum height, 2.94 metres hi…
P/3203/20/PRIOR
2020 Approved
725 Field End Road, Ruislip, Hillingdon, HA4 0RH
The first-floor side extension steps in to create a break in the flank wall. First floor…
P/1999/20/PREAPP
2020 Refused
,
Front porch; single and two storey side to rear extension; installation of one roof light…
P/0259/20
2020 Approved
225 Malvern Avenue, South Harrow, Harrow, HA2 9HF
Single Storey Rear Extension: 6 metres deep, 3 metres maximum height, 3 metres high to th…
P/1194/20/PRIOR
2019 Refused
129 Leamington Crescent, South Harrow, Harrow, HA2 9HJ
Single Storey Rear Extension: 6 metres deep, 4 metres maximum height, 3 metres high to th…
P/4439/19/PRIOR
2019 Refused
,
Single Storey Rear Extension: 6 metres deep, 3 metres maximum height, 3 metres high to th…
P/3068/19/PRIOR
2019 Approved
,
Single Storey Rear Extension: 6 metres deep, 3 metres maximum height, 3 metres high to th…
P/2790/19/PRIOR
2016 Approved
89 Leamington Crescent, Harrow, HA2 9HJ
Single storey rear extension
P/4050/16
2016 Approved
20 Thistledene Avenue, Harrow, HA2 9HL
Single storey rear extension: extending 6 metres beyond the original rear wall 3 metres m…
P/4564/16
2016 Approved
699 Field End Road, Ruislip, Hillingdon, HA4 0RH
Single storey rear extension: extending 6 metres beyond the original rear wall 3.2 Metres…
P/4649/16
2016 Approved
699 Field End Road, Ruislip, Hillingdon, HA4 0RH
Single storey rear extension: extending 6 metres beyond the original rear wall 3 metres m…
P/3279/16
2016 Refused
PAVEMENT ADJACENT TO 705 FIELD END ROAD RUISLIP HA4 0RH
Installation of vehicular crossover to front
71575/APP/2016/386
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