Data-backed planning intelligence · 3,290,000+ decisions analysed across England

Most Common Planning Applications in East Hertfordshire

Not all planning applications are created equal. The gap between the highest and lowest approval project type in East Hertfordshire is 20.4% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

17,065 real decisions·16 project types·Updated June 2026
82.7%
Safest: Conservatory
62.3%
Lowest: New Build
20.4%
Spread
16
Types ranked

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All 16 project types ranked

#TypeDecisionsApprovedRefusedRate
1Conservatory1,052870182
82.7%
2Rear Extension5,3414,2021,139
78.7%
3Wraparound Extension531415116
78.2%
4Extension (General)687518169
75.4%
5Loft Conversion958721237
75.3%
6Front Extension1,064797267
74.9%
7Outbuilding1,4271,062365
74.4%
8Side Extension3,0152,233782
74.1%
9Dormer1,6611,225436
73.8%
10Basement23016664
72.2%
11Garage / Parking4,2553,0271,228
71.1%
12Hip-to-Gable Conversion22015664
70.9%
13Annex349222127
63.6%
14Change of Use (Residential)1,033648385
62.7%
15Flat Conversion402515
62.5%
16New Build1,276795481
62.3%
See how this applies to your postcode →

These are council averages. Your property is specific.

A conservatory application has a 82.7% approval rate. New Build? Just 62.3%.
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What the data tells us

1
The range is massive: 62.3% to 82.7%. 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

4,530 planning applications in East Hertfordshire 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 East Hertfordshire planning data

Nearby councils project type rankings

Methodology: Classifies 17,065 decisions in East Hertfordshire 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 East Hertfordshire Council's public planning portal, January 2020 to present. Full methodology →
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