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Rear Extension Approval Rates in Eastleigh

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 5,628 real decisions tell us about rear extension outcomes in Eastleigh.

5,628 real decisions·January 2020 to present·Updated June 2026
87.7%
Approval Rate
5,628
Decisions
4,934
Approved
694
Refused
87.7% approved. But 694 refused since 2020. Each refusal cost the homeowner time and money on drawings and application fees. Understanding your local data before you apply is the difference between confidence and a costly gamble.

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Why rear extension approval rates matter

Rear extensions sit in the middle of the pack nationally. They're common enough that councils have clear precedent — but that cuts both ways. If your neighbours have been refused, that precedent works against you too.

Ward gap in Eastleigh: Hiltingbury Ward approves 100.0% of rear extension applications while Chandler's Ford Ward sits at 83.3%. That 16.7% gap means your postcode is one of the strongest indicators of outcome.

Rear Extension approval rate by ward

#WardDecisionsApprovedRate
1Hiltingbury Ward1010
100.0%
2Hedge End North Ward65
83.3%
3Chandler's Ford Ward65
83.3%
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These are council averages. Your property is specific.

A rear extension has a 100.0% approval rate in Hiltingbury Ward but just 83.3% in Chandler's Ford Ward.
Check your postcode to see what actually happens near your address.

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How rear extensions compare to other project types

Not all applications are treated equally. Here's how rear extensions stack up against other common projects in Eastleigh.

TypeDecisionsRate
Conservatory1,658
92.7%
Rear Extension5,628
87.7%
Extension (General)841
86.0%
Outbuilding756
85.7%
Side Extension3,796
85.6%
Wraparound Extension536
85.4%
Basement49
83.7%
Front Extension1,129
81.4%
Change of Use (Residential)848
80.2%
Garage / Parking4,483
80.1%
Loft Conversion355
79.7%
HMO51
78.4%
Flat Conversion27
77.8%
Dormer1,455
77.3%
Hip-to-Gable Conversion86
74.4%
Annex222
74.3%
New Build1,033
73.7%
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What the data tells us

1
87.7% of rear extension applications in Eastleigh get approved. That means 694 homeowners since 2020 have been refused. Not terrible odds, but not a foregone conclusion.
2
Your ward matters more than you think. The 16.7% gap between Hiltingbury Ward (100.0%) and Chandler's Ford Ward (83.3%) means your postcode is one of the strongest indicators of outcome.
3
Council averages are starting points, not guarantees. The decisions that matter most are the comparable ones near your specific property — because planning officers look at precedent, character and the immediate context of your street.

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

694 rear extension 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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Free · Property report emailed in minutes · Based on 3,290,000+ real decisions

More Eastleigh planning data

Methodology: Based on 5,628 planning decisions classified as rear extensions in Eastleigh, January 2020 to present. Classification uses keyword matching against proposal descriptions (matching generate_site_data.py rules). A single application may appear in multiple categories. Approval rate = approved / (approved + refused). Pending, withdrawn and invalid applications excluded. Data from Eastleigh Council's public planning portal. Full methodology →
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