Harrow planning approval rate

Harrow council approved 80.6% of planning applications and refused 19.4%, based on 12,600 decisions analysed. Ranked 16th out of 221 councils for strictness.

Last updated: March 2026 · Based on decisions from January 2020 to present

80.6%

overall approval rate

12,600

Decisions analysed

10,160

Approved

2,440

Refused

Wards covered

Planning in Harrow? Check your postcode to see approval rates specific to your ward and street.

Approval rate by application type

Different application types have different approval rates in Harrow. Householder and full planning applications typically have the highest volume.

Other (7,825 decided)

83.6%

Full (3,650 decided)

76.5%

Prior Approval (1,125 decided)

73.8%

Approval rate by project type

These rates are based on what homeowners are actually building in Harrow — mined from 12,600 proposal descriptions.

Rear Extension (4,812 decided)

78.2%

Garage / Parking (3,138 decided)

81.8%

Dormer (2,458 decided)

77.3%

Side Extension (2,430 decided)

74.7%

Front Extension (1,029 decided)

77.1%

Outbuilding (974 decided)

79.1%

Flat Conversion (829 decided)

92.2%

Extension (General) (684 decided)

81.4%

Change of Use (Residential) (642 decided)

83.8%

Conservatory (317 decided)

81.4%

Basement (307 decided)

85.0%

Wraparound Extension (223 decided)

82.5%

HMO (155 decided)

76.8%

New Build (139 decided)

79.1%

Loft Conversion (88 decided)

80.7%

Annex (54 decided)

42.6%

Hip-to-Gable Conversion (20 decided)

75.0%

Approval rate by ward

Planning outcomes vary significantly by ward within Harrow. Click any ward for detailed statistics.

Pinner (644 decided)

75.2%

Pinner South (583 decided)

76.7%

GREENHILL (564 decided)

93.3%

Marlborough (476 decided)

81.9%

Hatch End (463 decided)

78.6%

Harrow Weald (450 decided)

74.0%

Greenhill (420 decided)

75.2%

Roxeth (419 decided)

72.1%

Harrow on the Hill (405 decided)

75.1%

Edgware (403 decided)

69.5%

Canons (400 decided)

72.2%

Belmont (361 decided)

72.3%

MARLBOROUGH (335 decided)

93.7%

Kenton East (321 decided)

77.3%

Stanmore (315 decided)

72.4%

Headstone (289 decided)

78.9%

Centenary (281 decided)

75.8%

Kenton West (280 decided)

82.9%

Rayners Lane (247 decided)

71.3%

STANMORE PARK (247 decided)

93.5%

Wards in Harrow

Pinner

75.2% approval · 644 decisions

Pinner South

76.7% approval · 583 decisions

GREENHILL

93.3% approval · 564 decisions

Marlborough

81.9% approval · 476 decisions

Hatch End

78.6% approval · 463 decisions

Harrow Weald

74.0% approval · 450 decisions

Greenhill

75.2% approval · 420 decisions

Roxeth

72.1% approval · 419 decisions

Harrow on the Hill

75.1% approval · 405 decisions

Edgware

69.5% approval · 403 decisions

Canons

72.2% approval · 400 decisions

Belmont

72.3% approval · 361 decisions

MARLBOROUGH

93.7% approval · 335 decisions

Kenton East

77.3% approval · 321 decisions

Stanmore

72.4% approval · 315 decisions

Headstone

78.9% approval · 289 decisions

Centenary

75.8% approval · 281 decisions

Kenton West

82.9% approval · 280 decisions

Rayners Lane

71.3% approval · 247 decisions

STANMORE PARK

93.5% approval · 247 decisions

Recent comparable decisions

The most recent residential planning decisions in Harrow, showing how the council decides real applications.

PL/0911/25

Front porch, Conversion of garage to habitable room, Alterations to roof of gara · Pinner South · 10/06/2025

Approved

PL/0920/25

Single storey side to rear extension (Demolition of side extension) · Pinner South · 10/06/2025

Approved

PL/0883/25

Single storey side to rear extension · Stanmore · 10/06/2025

Approved

Showing 3 of 200 comparable decisions. See all 200 in the Pro Report →

What gets approved near your property?

In Harrow, 1 in 5 applications are refused. Your PlanningLens Pro Report gives you 17 pages of intelligence specific to your property:

✓ Ward-level approval rates for your exact area
✓ Common refusal reasons in Harrow
✓ Your 10 nearest comparable planning decisions
✓ Appeal success rates
✓ PDF report to share with your architect

Get Harrow Pro Report — £79

Less than one set of revised drawings. Based on 12,600 decisions.

Compare with nearby councils

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