14 Cannon Lane, Pinner, Harrow, HA5 1HL Data via plota.co.uk

PL/0807/25 - Householder Approved
Extensions & alterations

Proposal

Single storey rear extension Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
31 Mar 2025
✓
Validated
2 May 2025
✓
Approved
17 Sept 2025

Approved on 17 Sept 2025 · Delegated decision · Last checked 1 Oct 2026

Documents 9

Decision & officer reports 2

PDF Decision Notice DN - FULL and HSE Granted · 17 Sept 2025 View ↗ PDF Officer Report Delegated Report · 17 Sept 2025 View ↗

Statements & assessments 1

PDF Flood Risk Statement Supporting Info (Redacted) · 29 Apr 2025 View ↗

Plans & drawings 2

PDF Existing Plans and Elevations Plans · 29 Apr 2025 View ↗ PDF Proposed Plans and Elevations Plans · 29 Apr 2025 View ↗

Application forms 1

PDF Application Form Redacted Application Form (Redacted) · 2 Apr 2025 View ↗

Other documents 3

PDF Email Email · 1 May 2025 View ↗ PDF Fire Safety Supporting Info (Redacted) · 1 May 2025 View ↗ PDF Spatial analysis results (Created from GIS) Document · 2 Apr 2025 View ↗

All documents on the council site ↗

Site constraints 7

Flood zone 3, rivers and sea
High chance: a 1 in 100 or greater annual chance from rivers, or 1 in 200 from the sea. Any development here needs a flood risk assessment. Defences are not counted.
The Environment Agency flood map for planning. Homes in zone 3 must also pass the sequential test. Surface water flooding is a separate map.
Flood map ↗
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; Public transport access: PTAL 3 (moderate), TfL 2023, for the 100 m square; Flood defence 42 m away (natural high ground, designed for a 1 in 2 year flood); Priority habitat 29 m away: Deciduous woodland; Designated open space 28 m away.
Not affected
Not green belt · No listed building at the site · No scheduled monument at the site

Checked on 2 November 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.

Sales history 2

Last sold for £704,000 in February 2015. Detached house, freehold.

9 February 2015£704,000
28 April 2004£375,000

Sale prices from HM Land Registry's price paid record, matched to this application by its address.

Building

Floor area132 m² (1,421 sq ft)
Energy ratingE (54 out of 100), could reach C
PropertyDetached house, 6 habitable rooms
Built1900 to 1929
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in September 2014, the latest held for this property, matched to this application by its address. The building may have changed since. View the certificate

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Other new applications on this street

4 Nov 2026Approved

8 Cannon Lane, Pinner, Harrow, HA5 1HL

TPO No. 440 Cannon Lane (No.1) PInner T7 Oak (front, near left boundary): Crown ...

PL/2567/26
17 Sept 2026Pending

20 Cannon Lane, Pinner, Harrow, HA5 1HL

Front porch; single storey side plant room extension; external alterations (Retr...

PL/2462/26
3 Sept 2026Approved

24 Cannon Lane, Pinner, Harrow, HA5 1HL

Details pursuant to conditions 5 (Precautionary Working Method Statement) and 6 ...

PL/2334/26
28 Sept 2026Pending

136 Cannon Lane, Pinner, Harrow, HA5 1HR

Single storey front extension incorporating porch; single storey side extension;...

PL/2552/26

Nearby new applications

6 Nov 2026Pending

TRINITY COURT, 221 Marsh Road, Pinner, Harrow

Electronic Communications Notification: Installation of 3 tripod frames, support...

PL/2953/26
4 Nov 2026Approved

8 Cannon Lane, Pinner, Harrow, HA5 1HL

TPO No. 440 Cannon Lane (No.1) PInner T7 Oak (front, near left boundary): Crown ...

PL/2567/26
28 Oct 2026Pending

6 Ladbrook Close, Rayners Lane, Pinner, Harrow, HA5 5LB

Front porch; single storey side to rear wrap around extension; external alterati...

PL/2859/26
28 Oct 2026Pending

6 Ladbrook Close, Rayners Lane, Pinner, Harrow, HA5 5LB

Certificate of Lawful Proposed Development: Alterations to roof to form end gabl...

PL/2847/26
26 Oct 2026Pending

35 West End Avenue, Pinner, Harrow, HA5 1BH

Single storey rear extension

PL/2832/26
20 Oct 2026Pending

24 Grange Gardens, Pinner, Harrow, HA5 5QE

Relocation of entrance door in front elevation; Single storey front infill exten...

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Important details

Council
Harrow
Application type
Householder
Postcode
HA5 1HL
Received
31 Mar 2025
Validated
2 May 2025
Ward
Pinner South
Case officer
Show
Target decision
17 Sept 2025
Decision
Grant Conditionally
Decision date
17 Sept 2025
Decision level
Delegated decision
Applicant
Show
Agent
Mann Associates

How this decision compares

Decided in 138 days from validation, 82 days slower than Harrow's median of 56 for extensions. Approved, as 78% of extensions here are.

81%decided within 8 weeks
78%approved
1,884decided 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
17 Sept 2025

Historical activity at this location

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

This property

Previous applications at this address

2024 Approved
Certificate of Lawful Development (Proposed): Erection of outbuilding to be used as tool…
PL/2739/24
2023 Refused
Single storey rear extension: 8.00 metres deep, 3.00 metres maximum height and 2.80 metre…
P/2552/23/PRIOR
2023 Approved
CERTIFICATE OF LAWFUL DEVELOPMENT(PROPOSED):Alterations to roof; two side dormers
P/2662/23
2023 Withdrawn
P/2658/23
2023 Refused
CERTIFICATE OF LAWFUL DEVELOPMENT (PROPOSED): Alterations to roof; two side dormers
P/1716/23
2023 Refused
Single storey rear extension: 8.00 metres deep, 3.00 metres maximum height and 2.80 metre…
P/1703/23/PRIOR
Within ~100m

Nearby activity

2025 Withdrawn
24 Cannon Lane, Pinner, Harrow, HA5 1HL
Single storey front extension, Relocation of entrance door to front elevation, Two storey…
PL/0935/25
2024 Approved
13 Vale Croft, Pinner, Harrow, HA5 1HJ
Single storey rear extension: 6.00 metres deep, 3.20 metres maximum height and 3.00 metre…
PL/3216/24
2024 Approved
20 Cannon Lane, Pinner, Harrow, HA5 1HL
Single storey side extension, Single and two storey rear extension (Demolition of detache…
PL/2391/24
2024 Approved
49 Cannon Lane, Pinner, Harrow, HA5 1HN
Single storey rear extension: 5.00 metres deep, 3.50 metres maximum height and 3.00 metre…
PL/1301/24
2024 Approved
53 Cannon Lane, Pinner, Harrow, HA5 1HN
Single storey rear extension: 3.29 metres deep, 4.00 metres maximum height and 3.00 metre…
PL/1083/24
2024 Approved
9 Cannon Lane, Pinner, Harrow, HA5 1HH
Single storey rear extension: 4.00 metres deep, 3.25 metres maximum height and 3.00 metre…
PL/0635/24
2023 Approved
8 Cannon Lane, Pinner, Harrow, HA5 1HL
T7 Oak (front, near left boundary): Crown lift all round to give approx. 5m ground cleara…
PL/0287/23
2023 Approved
55 Cannon Lane, Pinner, Harrow, HA5 1HN
Front porch; single storey front, side and rear extension; external alterations (demoliti…
P/0087/23
2022 Approved
55 Cannon Lane, Pinner, Harrow, HA5 1HN
Single storey rear extension: 5.30 metres deep, 3.70 metres maximum height and 3.00 metre…
P/3259/22/PRIOR
2020 Approved
4 Vale Croft, Pinner, Harrow, HA5 1HJ
Single storey side to rear extension
P/4561/20
2020 Approved
34 Cannon Lane, Pinner, Harrow, HA5 1HL
Single storey front extension incorporating front porch; two storey side extension; singl…
P/3084/20
2020 Approved
57 Cannon Lane, Pinner, Harrow, HA5 1HN
Single storey rear conservatory extension
P/3399/20
2020 Refused
4 Vale Croft, Pinner, Harrow, HA5 1HJ
Single Storey Rear Extension: extending 5.99 metres beyond the original rear wall, 3.95 m…
P/3674/20/PRIOR
2020 Approved
20 Cannon Lane, Pinner, Harrow, HA5 1HL
T2 Silver Birch (rear garden): In decline. Fell and replace *see below
P/2570/20
2020 Approved
8 Cannon Lane, Pinner, Harrow, HA5 1HL
T7 Oak (front boundary): Crown Reduce back to previous points by removing 2m from all ove…
P/1569/20
2017 Approved
1 Vale Croft, Pinner, HA5 1HJ
Single storey rear extension: extending 3.50 Metres beyond the original rear wall 3.55 Me…
P/0653/17
2019 Approved
37 Cannon Lane, Pinner, Harrow, HA5 1HN
Single Storey Rear Extension: extending 3.85 metres beyond the original rear wall, 3 metr…
P/2520/19/PRIOR
2018 Approved
12 Cannon Lane, Pinner, HA5 1HL
Single storey detached dwelling at rear; refuse and cycle storage
P/4760/18
2018 Approved
57 Cannon Lane, Pinner, Harrow, HA5 1HN
Single storey side extension (demolition of attached garage)
P/4937/18
2018 Approved
12 Cannon Lane, Pinner, Harrow, HA5 1HL
Details pursuant to Condition 6 (disposal of sewage and surface water) of planning permis…
P/0731/18
2016 Approved
8 Cannon Lane, Pinner, HA5 1HL
T7 oak (front garden): clear branches away from phone line (1m clearance) and remove plas…
P/1757/16
2016 Approved
5 Vale Croft, Pinner, HA5 1HJ
Single storey rear extension: extending 3.1 Metres beyond the original rear wall 3.975 Me…
P/1186/16
2016 Approved
41 Cannon Lane, Pinner, HA5 1HN
Single storey rear extension: extending 4 metres beyond the original rear wall 4 metres m…
P/0821/16
2016 Approved
8 Cannon Lane, Pinner, HA5 1HL
Single storey front extension; conversion of garage to habitable room
P/0445/16
2016 Approved
2 Vale Croft, Pinner, HA5 1HJ
Single storey rear extension: extending 6 metres beyond the original rear wall 3.1 Metres…
P/0203/16
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

Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.

Freehold boundary: © Crown copyright and database rights 2026, HM Land Registry. Polygons © Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.