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Rear Extension Approval Rates in New Forest

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 2,449 real decisions tell us about rear extension outcomes in New Forest.

2,449 real decisions·January 2020 to present·Updated June 2026
92.4%
Approval Rate
2,449
Decisions
2,263
Approved
186
Refused
92.4% approved. But 186 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 New Forest: Milford & Hordle approves 100.0% of rear extension applications while Lymington sits at 77.8%. That 22.2% gap means your postcode is one of the strongest indicators of outcome.

Rear Extension approval rate by ward

#WardDecisionsApprovedRate
1Milford & Hordle77
100.0%
2Bransgore, Burley, Sopley & Ringwood Eas55
100.0%
3Totton Central55
100.0%
4Barton & Becton66
100.0%
5Lymington97
77.8%
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These are council averages. Your property is specific.

A rear extension has a 100.0% approval rate in Milford & Hordle but just 77.8% in Lymington.
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 New Forest.

TypeDecisionsRate
Hip-to-Gable Conversion21
100.0%
Conservatory482
95.6%
Front Extension336
94.0%
Side Extension1,382
93.5%
Rear Extension2,449
92.4%
Wraparound Extension238
92.4%
Extension (General)749
92.0%
Loft Conversion197
90.9%
Dormer640
90.5%
Annex113
88.5%
Outbuilding587
86.0%
Garage / Parking1,824
83.6%
Change of Use (Residential)274
79.6%
New Build143
63.6%
See how this applies to your postcode →

What the data tells us

1
92.4% of rear extension applications in New Forest get approved. That means 186 homeowners since 2020 have been refused. Not terrible odds, but not a foregone conclusion.
2
Your ward matters more than you think. The 22.2% gap between Milford & Hordle (100.0%) and Lymington (77.8%) 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

186 rear extension applications in New Forest 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 New Forest planning data

Nearby councils rear extension data

Methodology: Based on 2,449 planning decisions classified as rear extensions in New Forest, 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 New Forest Council's public planning portal. Full methodology →
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