4 Mansard Close, Pinner, Harrow, HA5 3FQ Data via plota.co.uk

PL/2790/26 - Householder Pending Consideration
Extensions & alterations

Proposal

Single storey rear extension; conversion of garage to habitable room with installation of window to front; external alterations Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
22 Oct 2026
✓
Validated
26 Oct 2026
Decision
Expected by 21 Dec 2026

Under consideration

No decision has been issued yet. Plota predicts a decision around 21 Dec 2026, from Harrow's recent extensions.

Documents 19

Statements & assessments 3

PDF Planning Heritage Supporting Info (Redacted) · 26 Oct 2026 View ↗ PDF reasonable exception statement Report/Assessment · 22 Oct 2026 View ↗ PDF Planning statement Report/Assessment · 22 Oct 2026 View ↗

Plans & drawings 13

PDF Proposed front & Rear Elevations Plans · 22 Oct 2026 View ↗ PDF proposed side elevations Plans · 22 Oct 2026 View ↗ PDF proposed roof plan Plans · 22 Oct 2026 View ↗ PDF existing front & Rear elevations Plans · 22 Oct 2026 View ↗ PDF proposed site plan Plans · 22 Oct 2026 View ↗ PDF proposed ground floor plan Plans · 22 Oct 2026 View ↗ PDF existing roof plan Plans · 22 Oct 2026 View ↗ PDF existing side elevation Plans · 22 Oct 2026 View ↗ PDF existing second floor plan Plans · 22 Oct 2026 View ↗ PDF existing ground Floor Plan(s) Plans · 22 Oct 2026 View ↗ PDF Existing Site Plan(s) Plans · 22 Oct 2026 View ↗ PDF Existing First Floor Plan(s) Plans · 22 Oct 2026 View ↗ PDF Location plan Plans · 22 Oct 2026 View ↗

Application forms 1

PDF Application Form redacted Application Form (Redacted) · 22 Oct 2026 View ↗

Other documents 2

PDF photos Photos/Imagery · 22 Oct 2026 View ↗ PDF photos Photos/Imagery · 22 Oct 2026 View ↗

All documents on the council site ↗

Site constraints 4

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 ↗
2 listed buildings within 150 m
Nearest: Sweetmans Hall, Grade II*, 44 m away · 1 Grade II*, 1 Grade II
The site itself is not listed. Listed building consent is needed for work that affects the special interest of a listed building, inside or out, on top of planning permission. Setting can be a consideration for buildings nearby; there is no fixed radius.
Show all 2 with distances
Historic England ↗
Also on the record
Inside the Harrow built-up area; Public transport access: PTAL 3 (moderate), TfL 2023, for the 100 m square.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 27 October 2026. Historic England, the Environment Agency, Natural England, Transport for London (public transport access levels, Powered by TfL Open Data, OGL v3.0, contains OS data © Crown copyright and database right 2025) 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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Important details

Council
Harrow
Application type
Householder
Postcode
HA5 3FQ
Received
22 Oct 2026
Validated
26 Oct 2026
Ward
Pinner South
Case officer
Show
Target decision
21 Dec 2026
Decision level
Delegated decision
Applicant
Show
Agent
SSK Architects Ltd

Decision outlook

Day 2 of the 56-day target. Harrow usually decides extensions by day 56.

Day 254 days to the 56-day target
80%decided within 8 weeks
79%approved
1,936decided in the last year

Plota live figures for extensions decided by Harrow in the last twelve months, from validation. Harrow decision record →

Consultation & key dates

Statutory expiry
21 Dec 2026

Historical activity at this location

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

Within ~100m

Nearby activity

2025
97 West End Lane, Pinner, Harrow, HA5 3NU
Single storey rear extension; conversion of detached garage to habitable room; external a…
PL/2793/25
2025 Approved
14 Westbury Lodge Close, Pinner, Harrow, HA5 3FG
Single storey rear extension; conversion of garage into habitable room with installation…
PL/2564/25
2024 Approved
91 West End Lane, Pinner, Harrow, HA5 3NU
Alterations and extension to roof to raise ridge height and create 2nd floor level, Exter…
PL/2801/24
2023 Refused
91 West End Lane, Pinner, Harrow, HA5 3NU
Alterations and extension to roof to create second floor level; external alterations
P/2412/23
2023 Approved
2 Sweetmans Avenue, Pinner, Harrow, HA5 3NS
Alterations and extension to raise garage roof height; alterations and extension to form…
P/0391/23
2022 Approved
9 Westbury Lodge Close, Pinner, Harrow, HA5 3FG
Single storey side to rear extension; external alterations (demolition of conservatory)
P/2034/22
2022 Refused
2 Sweetmans Avenue, Pinner, Harrow, HA5 3NS
Creation of first floor; single storey front infill extension; single storey side infill…
P/3125/22
2022 Approved
19 Westbury Lodge Close, Pinner, HA5 3FG
Conversion of garage into habitable room; replacement of garage door with window; replace…
P/1853/21/6041
2022 Withdrawn
9 Westbury Lodge Close, Pinner, Harrow, HA5 3FG
INVALID - Single and two storey side extension with first floor roof terrace to front; si…
P/2497/22
2021 Approved
27 Westbury Lodge Close, Pinner, Harrow, HA5 3FG
Conversion of garage into habiable room; installation of garage door to front elevation (…
P/0474/21
2021 Approved
2 Sweetmans Avenue, Pinner, Harrow, HA5 3NS
Creation of first floor; external alterations
P/2561/21
2021 Refused
19 Westbury Lodge Close, Pinner, Harrow, HA5 3FG
Conversion of garage into habitable room; replacement of garage door with window; replace…
P/1853/21
2021 Withdrawn
9 Westbury Lodge Close, Pinner, Harrow, HA5 3FG
Single and two storey side extension with first floor roof terrace to front; single store…
P/3908/21
2021 Approved
90 West End Lane, Pinner, Harrow, HA5 3NT
T1, T2 Yew x 2 (rear garden rear bdry): Crown Reduce by 2-3 metres - both trees have spar…
P/3114/21
2021 Approved
6 Westbury Lodge Close, Pinner, Harrow, HA5 3FG
G6 Wellingtonia (on land to side of rear garden of no.6): Selective root pruning on encro…
P/3057/21
2021 Approved
46 Westbury Lodge Close, Pinner, Harrow, HA5 3FG
Single storey rear extension
P/2939/21
2021 Approved
48 Westbury Lodge Close, Pinner, Harrow, HA5 3FG
Single storey rear infill extension; external alterations
P/2160/21
2021 Approved
51 Westbury Lodge Close, Pinner, Harrow, HA5 3FG
Conversion of garage into habitable room; external alterations
P/2215/21
2020 Approved
50 Westbury Lodge Close, Pinner, Harrow, HA5 3FG
Conversion of garage to habitable room; replacement of garage door with window
P/4584/20
2021 Approved
47 Westbury Lodge Close, Pinner, Harrow, HA5 3FG
Conversion of garage to habitable room with installation of window to front; external alt…
P/0007/21
2016 Approved
12 Westbury Lodge Close, Pinner, HA5 3FG
Single storey rear extension; conversion of garage to room with installation of window to…
P/5899/16
2016 Approved
19 Westbury Lodge Close, Pinner, HA5 3FG
Conversion of garage to room; external alterations at ground floor rear
P/5761/16
2016 Approved
12 Westbury Lodge Close, Pinner, HA5 3FG
Single storey rear extension; conversion of garage to room with installation of window to…
P/5219/16
2016 Approved
50 Westbury Lodge Close, Pinner, HA5 3FG
Single storey rear extension; conversion of garage to room with installation of window to…
P/1560/16/4992
2016 Approved
50 Westbury Lodge Close, Pinner, HA5 3FG
Single storey rear extension; conversion of garage to room with installation of window to…
P/1560/16
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