Data-backed planning intelligence · 3,230,000+ decisions analysed across England

Most Common Planning Applications in Watford

Not all planning applications are created equal. The gap between the highest and lowest approval project type in Watford is 11.6% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

2,357 real decisions·14 project types·Updated June 2026
100.0%
Safest: Wraparound Extension
88.4%
Lowest: Hip-to-Gable Conversion
11.6%
Spread
14
Types ranked

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All 14 project types ranked

#TypeDecisionsApprovedRefusedRate
1Wraparound Extension67670
100.0%
2New Build68680
100.0%
3Front Extension86851
98.8%
4Side Extension2672607
97.4%
5Garage / Parking2352269
96.2%
6Conservatory49472
95.9%
7Outbuilding1331249
93.2%
8Change of Use (Residential)91838
91.2%
9HMO41374
90.2%
10Extension (General)79718
89.9%
11Dormer34430638
89.0%
12Loft Conversion30827335
88.6%
13Rear Extension77868890
88.4%
14Hip-to-Gable Conversion1129913
88.4%
See how this applies to your postcode →

These are council averages. Your property is specific.

A wraparound extension application has a 100.0% approval rate. Hip-to-Gable Conversion? Just 88.4%.
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What the data tells us

1
The range is massive: 88.4% to 100.0%. Choosing the right project type — or framing your application correctly — can dramatically affect outcomes.
2
Visibility drives scrutiny. Project types that change the external appearance — dormers, loft conversions, hip-to-gable — face more resistance than those that don't. The more visible your proposal, the more carefully it needs designing.
3
These are council-wide averages. Your ward, your street and your immediate neighbours all shift the odds. The comparable decisions near your property are the best indicator of outcome.

Before you spend £5,000+ on architects and drawings

211 planning applications in Watford have been refused since 2020. Many of those homeowners had already paid for drawings and application fees. A free, property-specific report shows you what gets approved — and what gets refused — near your property.

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More Watford planning data

Methodology: Classifies 2,357 decisions in Watford into residential project types using keyword matching against proposal descriptions (matching generate_site_data.py subtype rules). A single application may appear in multiple categories. Data from Watford Council's public planning portal, January 2020 to present. Full methodology →
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