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 12.0% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

2,485 real decisions·14 project types·Updated June 2026
100.0%
Safest: Wraparound Extension
88.0%
Lowest: Loft Conversion
12.0%
Spread
14
Types ranked

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All 14 project types ranked

#TypeDecisionsApprovedRefusedRate
1Wraparound Extension72720
100.0%
2New Build73730
100.0%
3Front Extension93921
98.9%
4Side Extension28827810
96.5%
5Conservatory51492
96.1%
6Garage / Parking25124110
96.0%
7Outbuilding1361279
93.4%
8Change of Use (Residential)93858
91.4%
9Extension (General)85778
90.6%
10HMO42384
90.5%
11Hip-to-Gable Conversion12010713
89.2%
12Dormer36832840
89.1%
13Rear Extension82472896
88.3%
14Loft Conversion33429440
88.0%
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. Loft Conversion? Just 88.0%.
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What the data tells us

1
The range is massive: 88.0% 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

219 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 2,485 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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