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Rear Extension Approval Rates in Bolton

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 305 real decisions tell us about rear extension outcomes in Bolton.

305 real decisions·January 2020 to present·Updated June 2026
84.3%
Approval Rate
305
Decisions
257
Approved
48
Refused
84.3% approved. But 48 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 Bolton: Hulton approves 100.0% of rear extension applications while Westhoughton North & Hunger Hill 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
1Hulton77
100.0%
2Westhoughton North & Hunger Hill65
83.3%
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These are council averages. Your property is specific.

A rear extension has a 100.0% approval rate in Hulton but just 83.3% in Westhoughton North & Hunger Hill.
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 Bolton.

TypeDecisionsRate
Conservatory165
91.5%
Garage / Parking393
85.2%
Rear Extension305
84.3%
Wraparound Extension36
83.3%
Extension (General)967
81.8%
Side Extension194
80.9%
New Build254
80.7%
Flat Conversion24
79.2%
Dormer163
79.1%
Front Extension56
75.0%
Outbuilding55
74.5%
Loft Conversion28
71.4%
Change of Use (Residential)271
69.0%
HMO61
41.0%
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What the data tells us

1
84.3% of rear extension applications in Bolton get approved. That means 48 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 Hulton (100.0%) and Westhoughton North & Hunger Hill (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

48 rear extension applications in Bolton 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 Bolton planning data

Methodology: Based on 305 planning decisions classified as rear extensions in Bolton, 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 Bolton Council's public planning portal. Full methodology →
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