18 Charmian Avenue, Stanmore, Harrow, HA7 1LJ Data via plota.co.uk

PL/2368/26 - Certificate of Lawful Development Existing Pending Consideration
Admin / procedural

Proposal

Certificate of Lawful Development (Existing): Single storey rear extension and store; external alterations Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
week of 28 Sept 2026
✓
Validated
1 Oct 2026
Decision
Expected by 26 Nov 2026

This application is under consideration - no decision has been issued yet. A decision is expected by 26 Nov 2026.

Documents 5

Statements & assessments 1

PDF Supporting Statement for a Lawful Development Certificate Report · 8 Sept 2026 View ↗

Plans & drawings 3

PDF Pre-Existing and Existing Ground Floor Plan Plans · 1 Oct 2026 View ↗ PDF Existing Floor Plans, Elevation Plan Plans · 8 Sept 2026 View ↗ PDF Site Location Plan Plans · 8 Sept 2026 View ↗

Application forms 1

PDF Application Form - Without Personal Data Application Form (Redacted) · 8 Sept 2026 View ↗

All documents on the council site ↗

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 2 October 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.

Sales history 4

Last sold for £231,000 in December 2002. Terraced house, freehold.

6 December 2002£231,000
8 December 1995£103,000
16 March 1995£67,000
4 January 1995£55,000

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

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Important details

Council
Harrow
Application type
Certificate of Lawful Development Existing
Postcode
HA7 1LJ
Received
week of 28 Sept 2026
Validated
1 Oct 2026
Ward
Centenary
Case officer
Show
Target decision
26 Nov 2026
Decision level
Delegated decision
Applicant
Show
Agent
Show

Consultation & key dates

Statutory expiry
26 Nov 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

2021 Refused
Single storey rear extension: 6.00 metres deep, 3.60 metres maximum height and 3.00 metre…
P/0164/21/PRIOR
2020 Withdrawn
Single storey rear extension: 6.00 metres deep, 3.60 metres maximum height and 3.00 metre…
P/4174/20/PRIOR
Within ~100m

Nearby activity

2025 Withdrawn
1, 1 Clydesdale Avenue, Stanmore, Harrow, HA7 1LN
Single storey rear extension (retrospective)
PL/2144/25
2025 Withdrawn
1, 1 Clydesdale Avenue, Stanmore, Harrow, HA7 1LN
Conversion of garage into habitable room; external alterations (retrospective)
PL/2141/25
2024 Approved
2 Charmian Avenue, Stanmore, Harrow, HA7 1LJ
Single storey side extension; front porch; external alterations (demolition of attached g…
PL/2023/24
2024 Refused
2 Charmian Avenue, Stanmore, Harrow, HA7 1LJ
Single storey front extension incorporating front porch; single storey side extension; de…
PL/0523/24
2023 Approved
52 Charmian Avenue, Stanmore, Harrow, HA7 1LJ
Single storey side extension; External alterations (Demolition of attached garage at side)
P/1828/23
2023 Approved
10 Clydesdale Avenue, Stanmore, Harrow, HA7 1LW
Single storey rear extension: 6.00 metres deep, 3.30 metres maximum height and 3.00 metre…
P/1255/23/PRIOR
2022 Approved
37 Charmian Avenue, Stanmore, Harrow, HA7 1LL
Single Storey Rear Extension: 6.00 metres deep, 3.40 metres maximum height, 3.00 metres h…
P/1360/22/PRIOR
2021 Approved
29 Clydesdale Avenue, Stanmore, Harrow, HA7 1LN
Single storey rear extension: 6.00 metres deep, 3.37 metres maximum height and 3.00 metre…
P/2651/21/PRIOR
2021 Approved
11 Charmian Avenue, Stanmore, Harrow, HA7 1LL
Single Storey Rear Extension: 6.00 metres deep, 3.00 metres maximum height, 2.70 metres h…
P/1325/21/PRIOR
2021 Approved
41 Charmian Avenue, Stanmore, Harrow, HA7 1LL
Single Storey Rear Extension: 6.00 metres deep, 3.40 metres maximum height, 3.00 metres h…
P/1219/21/PRIOR
2021 Approved
11 Charmian Avenue, Stanmore, Harrow, HA7 1LL
Single Storey Rear Extension: 6.00 metres deep, 3.00 metres maximum height, 2.70 metres h…
P/0722/21/PRIOR
2021 Approved
11 Clydesdale Avenue, Stanmore, Harrow, HA7 1LN
Single storey rear extension: 6.00 metres deep, 3.45 metres maximum height and 2.90 metre…
P/0152/21/PRIOR
2020 Approved
29 Charmian Avenue, Stanmore, Harrow, HA7 1LL
Single storey rear extension: 6.00 metres deep, 3.00 metres maximum height and 3.00 metre…
P/0011/21/PRIOR
2020 Approved
29 Clydesdale Avenue, Stanmore, Harrow, HA7 1LN
Single storey rear extension: 6.00 metres deep, 3.37 metres maximum height and 3.00 metre…
P/4045/20/PRIOR
2020 Refused
15 Charmian Avenue, Stanmore, Harrow, HA7 1LL
Single storey rear extension to connect detached garage; conversion of garage to play roo…
P/2803/20
2020 Approved
15 Charmian Avenue, Stanmore, Harrow, HA7 1LL
Single Storey Rear Extension: 6.00 metres deep, 3.20 metres maximum height, 3.00 metres h…
P/3349/20/PRIOR
2020 Approved
24 Clydesdale Avenue, Stanmore, HA7 1LW
Single storey rear extension removal of chimney breasts formation of ground floor shower/…
FP/01103/2020
2020 Approved
15 Charmian Avenue, Stanmore, HA7 1LL
Loft conversion and removal of chimneys gas and electrical installations are excluded fro…
IN/01147/2020
2020 Approved
24 Clydesdale Avenue, Stanmore, HA7 1LW
Single storey rear extension removal of chimney breasts and formation of ground floor sho…
IN/01115/2020
2020 Withdrawn
15 Charmian Avenue, Stanmore, Harrow, HA7 1LL
Single Storey Rear Extension: 6.00 metres deep, 3.20 metres maximum height, 3.00 metres h…
P/2812/20/PRIOR
2016 Approved
45 Clydesdale Avenue, Stanmore, HA7 1LN
Single storey rear extension: extending 4 metres beyond the original rear wall 3.4 Metres…
P/2499/16
2016 Approved
43 Clydesdale Avenue, Stanmore, HA7 1LN
Single storey rear extension: extending 4 metres beyond the original rear wall 3.4 Metres…
P/2497/16
2016 Approved
41 Clydesdale Avenue, Stanmore, HA7 1LN
Single storey rear extension: extending 4 metres beyond the original rear wall 3.4 Metres…
P/2496/16
2016 Approved
1 Charmian Avenue, Stanmore, HA7 1LL
Single storey rear extensions
P/2006/16
2016 Approved
1 Charmian Avenue, Stanmore, HA7 1LL
Single storey rear extension: extending 6 metres beyond the original rear wall 3 metres m…
P/0131/16
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.