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Rear Extension Approval Rates in Harborough

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 621 real decisions tell us about rear extension outcomes in Harborough.

621 real decisions·January 2020 to September 2026·Updated September 2026
91.8%
Approval Rate
621
Decisions
570
Approved
51
Refused
91.8% approved. But 51 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.

These are council averages. Your property is specific.

Two houses on the same street can get different outcomes.
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 Harborough.

TypeDecisionsRate
Side Extension358
94.4%
Conservatory82
92.7%
Wraparound Extension63
92.1%
Rear Extension621
91.8%
Extension (General)189
91.5%
Front Extension125
91.2%
Outbuilding199
91.0%
Dormer115
89.6%
Loft Conversion57
89.5%
Garage / Parking523
89.3%
Annex54
87.0%
New Build231
82.3%
Change of Use (Residential)216
79.2%
See how this applies to your postcode →

What the data tells us

1
91.8% of rear extension applications in Harborough get approved. That means 51 homeowners since 2020 have been refused. Not terrible odds, but not a foregone conclusion.
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

51 rear extension applications in Harborough 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 3,840,000+ real decisions

More Harborough planning data

Methodology: Based on 621 planning decisions classified as rear extensions in Harborough, January 2020 to September 2026. 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 Harborough Council's public planning portal. Full methodology →
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