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Most Common Planning Applications in Eastleigh

Not all planning applications are created equal. The gap between the highest and lowest approval project type in Eastleigh is 18.9% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

16,406 real decisions·17 project types·Updated June 2026
92.8%
Safest: Conservatory
73.9%
Lowest: New Build
18.9%
Spread
17
Types ranked

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All 17 project types ranked

#TypeDecisionsApprovedRefusedRate
1Conservatory1,6891,568121
92.8%
2Rear Extension5,8145,120694
88.1%
3Outbuilding787679108
86.3%
4Extension (General)860742118
86.3%
5Side Extension3,8463,299547
85.8%
6Wraparound Extension54346578
85.6%
7Basement50428
84.0%
8Loft Conversion44737572
83.9%
9HMO665511
83.3%
10Front Extension1,131921210
81.4%
11Change of Use (Residential)869701168
80.7%
12Hip-to-Gable Conversion1139122
80.5%
13Garage / Parking4,5483,655893
80.4%
14Dormer1,5631,232331
78.8%
15Flat Conversion27216
77.8%
16Annex23718057
75.9%
17New Build1,043771272
73.9%
See how this applies to your postcode →

These are council averages. Your property is specific.

A conservatory application has a 92.8% approval rate. New Build? Just 73.9%.
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What the data tells us

1
The range is massive: 73.9% to 92.8%. 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

2,355 planning applications in Eastleigh 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 Eastleigh planning data

Methodology: Classifies 16,406 decisions in Eastleigh 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 Eastleigh Council's public planning portal, January 2020 to June 2026. Full methodology →
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