8 Blackwell Close, Harrow Weald, Harrow, HA3 6JY Data via plota.co.uk

Pending PL/1694/26 - Householder
Extensions & alterations
Council
Harrow 4.9/10
Date received
26 Jun 2026
Postcode
HA3 6JY
Type
Householder

Description

Conversion of garage into habitable room; front porch; single storey rear extension; external alterations including installation of external staircase at rear Data via plota.co.uk

Get alerts nearby Council site ↗

Last checked

Decision outlook

Plota predicted a decision around 14 Sept 2026; it is now day 80.

Day 80, past the statutory target. 93% of householder applications in Harrow are decided within thirteen weeks, which runs to 25 Sept 2026; extensions of time are common, and the council need not decide on the day. Last seen undecided on 24 Aug 2026.

Day 8024 days past the 56-day target
71%decided within 8 weeks
90%approved
31,203decided in the last year

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

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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Nearby new applications

10 Sept 2026Pending

3 Monro Gardens, Harrow Weald, Harrow, HA3 6HH

Single storey side to rear extension (demolition of garage and shed)

PL/2171/26
27 Aug 2026Pending

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

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

PL/2223/26
26 Aug 2026Pending

17 Elms Road, Harrow Weald, Harrow, HA3 6BB

Conversion of dwelling into four flats (2 x studio, 1 x 2 bed, 1 x 4 bed); singl...

PL/1381/26
21 Aug 2026Approved

50 Long Elmes, Harrow Weald, Harrow, HA3 5JL

Certificate of Lawful Development (Proposed): Rear dormer; three rooflights in f...

PL/1774/26
20 Aug 2026Pending

72 Boxtree Road, Harrow Weald, Harrow, HA3 6TH

Single storey front extension incorporating front porch; alteration of roof to s...

PL/1989/26
31 Jul 2026Pending

3 Bellfield Avenue, Harrow Weald, Harrow, HA3 6ST

Creation of first floor to bungalow to form two storey dwellinghouse; two side d...

PL/0579/26

Historical activity at this location

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

Within ~100m

Nearby activity

2024 Approved
4 Colmer Place, Harrow Weald, Harrow, HA3 6JW
Single storey side to rear extension; external alterations
PL/1339/24
2024 Approved
64 - 66 Boxtree Lane, Harrow Weald, Harrow, HA3 6JR
Conversion of detached dwelling into two semi-detached dwellings (1 X 4 bed and 1 X 2 bed)
PL/0247/24
2023 Refused
4 Colmer Place, Harrow Weald, Harrow, HA3 6JW
Single storey side extension to create (1 bed) bungalow; parking; bin and cycle stores
P/0187/23
2023 Approved
55 Boxtree Lane, Harrow Weald, Harrow, HA3 6JP
Single storey rear extension: 6.00 metres deep, 3.00 metres maximum height and 3.00 metre…
P/0610/23/PRIOR
2022 Refused
4 Blackwell Close, Harrow Weald, Harrow, HA3 6JY
Conversion of dwelling into two flats (1 X 1 bed and 1 X 2 bed); single storey rear exten…
P/3179/22
2021 Approved
1 Colmer Place, Harrow Weald, Harrow, HA3 6JW
Conversion of single storey side element into studio flat; external alterations; separate…
P/1919/21
2021 Approved
6a Colmer Place, Harrow Weald, Harrow, HA3 6JW
Single storey rear extension to ground floor flat; external alterations
P/2358/21
2021 Approved
29 Boxtree Lane, Harrow Weald, Harrow, HA3 6JP
Single storey rear extension: 6.00 metres deep, 2.90 metres maximum height and 2.80 metre…
P/2288/21/PRIOR
2020 Approved
31 Boxtree Lane, Harrow Weald, Harrow, HA3 6JP
Single Storey Side Extension (Demolition Of Garage)
P/3516/20
2020 Approved
31 Boxtree Lane, Harrow Weald, Harrow, HA3 6JP
Single storey rear extension: 6.00 metres deep, 3.10 metres maximum height and 2.92 metre…
P/3457/20/PRIOR
2020 Approved
12 Colmer Place, Harrow Weald, Harrow, HA3 6JW
Single storey rear extension; rear dormer; front porch; hard and soft landscaping; single…
P/2456/20
2019 Approved
13 Colmer Place, Harrow Weald, Harrow, HA3 6JW
Single storey rear extension; rear dormer; installation of two rooflights in front roofsl…
P/0867/19
2019 Approved
5 Blackwell Close, Harrow Weald, Harrow, HA3 6JY
Single storey rear extension; Alterations to first floor balcony door (Retrospective)
P/0544/19
2017 Approved
1 Colmer Place, Harrow Weald, Harrow, HA3 6JW
Conversion of dwelling into three flats; first floor side extension; single storey rear e…
P/5660/17
2017 Approved
11 Colmer Place, Harrow, HA3 6JW
Single storey rear extension; rear dormer; two rooflights in front roofslope to create ha…
P/2484/17
2017 Approved
62 Boxtree Lane, Harrow Weald, Harrow, HA3 6JR
First floor rear extension
P/2494/17
2017 Approved
62 Boxtree Lane, Harrow Weald, Harrow, HA3 6JR
Single storey side and rear extension; alteration to roof of existing single storey side…
P/1323/17
2016 Approved
62 Boxtree Lane, Harrow Weald, Harrow, HA3 6JR
Single storey rear extension; first floor rear extension
P/5760/16
2016 Approved
5 Blackwell Close, Harrow, HA3 6JY
Single storey rear extension
P/5441/16
2016 Approved
62 Boxtree Lane, Harrow Weald, Harrow, HA3 6JR
Single storey side and rear extension with two storey extension over side to house intern…
P/3758/16
2016 Approved
5 Blackwell Close, Harrow, HA3 6JY
Single storey rear extension
P/2847/16
2016 Approved
57 Boxtree Lane, Harrow Weald, Harrow, HA3 6JP
Single storey front extension incorporating front porch and two storey side extension
P/3131/16
2016 Approved
57 Boxtree Lane, Harrow Weald, Harrow, HA3 6JP
Single storey rear extension: extending 3.47 Metres beyond the original rear wall 2.95 Me…
P/3005/16
2016 Withdrawn
62 Boxtree Lane, Harrow Weald, Harrow, HA3 6JR
INVALID - Single storey side and rear extension with two storey extension over side to ho…
P/2127/16
2023 Refused
64 - 66 Boxtree Lane, Harrow Weald, Harrow, HA3 6JR
CERTIFICATE OF LAWFUL DEVELOPMENT(PROPOSED): Conversion of single dwelling into two dwell…
PL/0263/23
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