27 Derwent Avenue, Hatch End, Pinner, Harrow, HA5 4QH Data via plota.co.uk

PL/2318/26 - Householder Pending Consideration
Extensions & alterationsSolar & renewables

Proposal

Front porch, Bay window to ground floor front elevation, Relocation of entrance to front elevation; Single and two storey side extension; Installation of windows in both side elevations; Alterations to roof to raise height and create habitable floor; End gables; Front dormers; Rear dormer with Juliette balconies; Installation of roof lights in front roof slope; Installation of solar panels and roof light to roof; Alterations to roof of rear extension; External alterations Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
2 Sept 2026
✓
Validated
3 Sept 2026
Decision
Expected by 29 Oct 2026

Under consideration

No decision has been issued yet. Plota predicts a decision around 29 Oct 2026, from Harrow's recent extensions.

Documents 12

Statements & assessments 1

PDF Reasonable Exception Statement Report/Assessment · 3 Sept 2026 View ↗

Plans & drawings 9

PDF Proposed Floor plans(s) Plans · 3 Sept 2026 View ↗ PDF Existing floor Plan(s) Plans · 3 Sept 2026 View ↗ PDF Proposed Site Plan(s) Plans · 3 Sept 2026 View ↗ PDF Proposed Roof Plan(s) Plans · 3 Sept 2026 View ↗ PDF existing elevations Plans · 3 Sept 2026 View ↗ PDF Existing Site Plan(s) Plans · 3 Sept 2026 View ↗ PDF Proposed & Existing Street Scene Plans · 3 Sept 2026 View ↗ PDF Proposed Elevation(s) Plans · 3 Sept 2026 View ↗ PDF location plan Plans · 3 Sept 2026 View ↗

Application forms 1

PDF Application Form Application Form (Redacted) · 3 Sept 2026 View ↗

Other documents 1

PDF CIL CIL Document · 3 Sept 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 ↗
Also on the record
Inside the Harrow built-up area; Public transport access: PTAL 0 (very poor), TfL 2023, for the 100 m square; Green belt 69 m away: London.
Not affected
Outside flood zones 2 and 3 · No listed building at the site · No scheduled monument at the site

Checked on 17 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.

Sales history 1

Last sold for £570,000 in June 2017. Detached house, freehold.

19 June 2017£570,000

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

Building

Floor area64 m² (689 sq ft)
Energy ratingF (36 out of 100), could reach D
PropertyDetached bungalow, 3 habitable rooms
Built1930 to 1949
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in February 2017, 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

18 Jun 2026Approved

15 Derwent Avenue, Hatch End, Pinner, Harrow, HA5 4QH

Single storey side to rear extension; front porch; single storey outbuilding in ...

PL/1683/26
17 Sept 2026Pending

8 Derwent Avenue, Hatch End, Pinner, Harrow, HA5 4QJ

Front porch and relocation of entrance to front; single storey side to rear exte...

PL/2178/26
1 Sept 2026Refused

8A Derwent Avenue, Hatch End, Pinner, Harrow, HA5 4QJ

Single storey rear extension: 4.50 metres deep, 3.00 metres maximum height and 2...

PL/2315/26

Nearby new applications

22 Oct 2026Pending

1 Hillview Close, Hatch End, Pinner, Harrow, HA5 4PD

Variation of condition 2 (Approved Plans) attached to planning permission PL/052...

PL/2793/26
2 Oct 2026Pending

8 Hillview Close, Hatch End, Pinner, Harrow, HA5 4PD

Certificate of lawful development (proposed): Dormer and rooflight to each side ...

PL/2615/26
23 Sept 2026Pending

2 Kennedy Close, Hatch End, Pinner, Harrow, HA5 4HL

Front porch; Single storey side extension; Single storey rear extension; Externa...

PL/2504/26
17 Sept 2026Pending

8 Derwent Avenue, Hatch End, Pinner, Harrow, HA5 4QJ

Front porch and relocation of entrance to front; single storey side to rear exte...

PL/2178/26
15 Sept 2026Pending

37 The Avenue, Hatch End, Pinner, Harrow, HA5 4EL

Two storey front extension with roof canopy; single and two storey rear extensio...

PL/2453/26
3 Sept 2026Pending

17 Grimsdyke Road, Hatch End, Pinner, Harrow, HA5 4PJ

Variation of Condition 2 (Approved Plans) attached to planning permission PL/161...

PL/2333/26

Important details

Council
Harrow
Application type
Householder
Postcode
HA5 4QH
Received
2 Sept 2026
Validated
3 Sept 2026
Case officer
Show
Target decision
29 Oct 2026
Decision level
Delegated decision
Applicant
Show
Agent
Manu Design Limited

Decision outlook

Day 55 of the 56-day target. Harrow usually decides extensions by day 56.

Day 551 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
29 Oct 2026

Historical activity at this location

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

This property

Previous applications at this address

2025 Approved
Front porch, Relocation of entrance door to front elevation Single and two storey side ex…
PL/0384/25
2022
Alterations and extension to roof to create first floor level; front and rear dormers; ro…
P/0126/22
2017 Withdrawn
INVALID - To carry out 4M rear extension and 1.8M side extension
P/3124/17
Within ~100m

Nearby activity

2025
30 Derwent Avenue, Hatch End, Pinner, Harrow, HA5 4QJ
Single storey rear extension; alterations to roof to form gable ends; two dormers to each…
PL/3120/25
2025 Approved
15 Derwent Avenue, Hatch End, Pinner, Harrow, HA5 4QH
Single storey side to rear extension; alterations and extension to roof to form end gable…
PL/0649/25
2024 Approved
42 Derwent Avenue, Hatch End, Pinner, Harrow, HA5 4QJ
Single storey side to rear extension; first floor side extension; relocation of main entr…
PL/1691/24
2024 Approved
42 Derwent Avenue, Hatch End, Pinner, Harrow, HA5 4QJ
Single storey side to rear extension; first floor side extension; alterations and extensi…
PL/0726/24
2023 Approved
33 Lyndon Avenue, Hatch End, Pinner, Harrow, HA5 4QF
Single storey front extension incorporating porch; two storey side to rear extension; sin…
PL/0422/23
2023 Approved
42 Derwent Avenue, Hatch End, Pinner, Harrow, HA5 4QJ
Single storey side to rear extension; single storey rear extension; first floor side exte…
PL/0419/23
2023 Approved
42 Derwent Avenue, Hatch End, Pinner, Harrow, HA5 4QJ
Single storey rear extension: 6.00 metres deep, 3.20 metres maximum height and 2.54 metre…
PL/0192/23
2023 Approved
33 Lyndon Avenue, Hatch End, Pinner, Harrow, HA5 4QF
Single Storey Rear Extension: 6.00 metres deep, 3.40 metres maximum height, 3.00 metres h…
P/2424/23/PRIOR
2023 Approved
42 Lyndon Avenue, Hatch End, Pinner, Harrow, HA5 4QG
Conversion of garage to habitable room with installation of window to front; external alt…
P/1731/23
2023 Approved
15 Lyndon Avenue, Hatch End, Pinner, Harrow, HA5 4QF
Single storey front extension incorporating front porch; Single storey rear extension
P/0092/23
2023 Approved
43 Lyndon Avenue, Hatch End, Pinner, Harrow, HA5 4QF
Single storey front extension; single and two storey rear extension; first floor side ext…
P/0982/23
2022 Approved
27 Derwent Avenue, Pinner, HA5 4QH
Alterations and extension to roof to create first floor level; front and rear dormers; ro…
P/0126/22/6079
2022 Approved
15 Lyndon Avenue, Hatch End, Pinner, Harrow, HA5 4QF
Single storey rear extension: 4.00 metres deep, 3.55 metres maximum height and 3.00 metre…
P/4008/22/PRIOR
2022 Approved
33 Derwent Avenue, Hatch End, Pinner, Harrow, HA5 4QH
Single storey side extension to create undercroft; single storey side to rear extension…
P/2754/22
2022 Refused
33 Derwent Avenue, Hatch End, Pinner, Harrow, HA5 4QH
Single storey side extension; single storey rear extension; front porch; alterations and…
P/1059/22
2022 Approved
43 Lyndon Avenue, Hatch End, Pinner, Harrow, HA5 4QF
Single storey front extension; single and two storey rear extension; first floor side ext…
P/1202/22
2022 Approved
43 Lyndon Avenue, Hatch End, Pinner, Harrow, HA5 4QF
Single storey rear extension: 4.50 metres deep, 3.00 metres maximum height and 3.00 metre…
P/0053/22/PRIOR
2021 Approved
3 Lyndon Avenue, Hatch End, Pinner, Harrow, HA5 4QF
Single storey rear extension
P/0670/21
2021 Approved
3 Lyndon Avenue, Hatch End, Pinner, Harrow, HA5 4QF
Single storey front extension incorporating front porch
P/0669/21
2020 Approved
22 Derwent Avenue, Hatch End, Pinner, Harrow, HA5 4QJ
Single storey rear extension
P/4167/20
2017 Approved
27 Lyndon Avenue, Pinner, HA5 4QF
First floor side extension; brick pier support at ground floor level
P/1919/17
2016 Approved
3 Derwent Avenue, Pinner, HA5 4QH
Single storey rear extension
P/5575/16
2016 Approved
29 Lyndon Avenue, Pinner, HA5 4QF
Single storey front extension incorporating front porch; two storey side to rear extensio…
P/4976/16
2016 Approved
38 Lyndon Avenue, Pinner, HA5 4QG
Single storey rear infill extension.
P/4136/16
2016 Approved
12 Lyndon Avenue, Pinner, HA5 4QG
First floor side extension; rooflight in front and rear roofslopes; sun pipe in side roof…
P/0930/16
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.

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.