Data-backed planning intelligence · 3,780,000+ decisions analysed across England

Most Common Planning Applications in Arun

Not all planning applications are created equal. The gap between the highest and lowest approval project type in Arun is 18.5% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

3,412 real decisions·14 project types·Updated August 2026
99.1%
Safest: Conservatory
80.6%
Lowest: New Build
18.5%
Spread
14
Types ranked

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All 14 project types ranked

#TypeDecisionsApprovedRefusedRate
1Conservatory1151141
99.1%
2Rear Extension3533449
97.5%
3Front Extension70682
97.1%
4Side Extension1621575
96.9%
5Hip-to-Gable Conversion27261
96.3%
6Loft Conversion77743
96.1%
7Wraparound Extension20191
95.0%
8Dormer1571498
94.9%
9Extension (General)1151096
94.8%
10Outbuilding89845
94.4%
11Change of Use (Residential)28262
92.9%
12Garage / Parking29727126
91.2%
13Annex23194
82.6%
14New Build36297
80.6%
See how this applies to your postcode →

These are council averages. Your property is specific.

A conservatory application has a 99.1% approval rate. New Build? Just 80.6%.
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What the data tells us

1
The range is massive: 80.6% to 99.1%. 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

226 planning applications in Arun 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 Arun planning data

Methodology: Classifies 3,412 decisions in Arun 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 Arun Council's public planning portal, January 2020 to July 2026. Full methodology →
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