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Rear Extension Approval Rates in Chesterfield

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 824 real decisions tell us about rear extension outcomes in Chesterfield.

824 real decisions·January 2020 to present·Updated June 2026
93.0%
Approval Rate
824
Decisions
766
Approved
58
Refused
93.0% approved. But 58 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 Chesterfield: Walton approves 100.0% of rear extension applications while Brampton West & Loundsley Green sits at 88.9%. That 11.1% gap means your postcode is one of the strongest indicators of outcome.

Rear Extension approval rate by ward

#WardDecisionsApprovedRate
1Walton66
100.0%
2Brampton West & Loundsley Green98
88.9%
See how this applies to your postcode →

These are council averages. Your property is specific.

A rear extension has a 100.0% approval rate in Walton but just 88.9% in Brampton West & Loundsley Green.
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 Chesterfield.

TypeDecisionsRate
Conservatory188
96.8%
Wraparound Extension86
96.5%
HMO29
93.1%
Rear Extension824
93.0%
Side Extension546
92.9%
Extension (General)454
92.3%
Dormer136
91.2%
Loft Conversion77
90.9%
Front Extension138
90.6%
Annex42
90.5%
Garage / Parking814
88.7%
Change of Use (Residential)320
86.2%
Outbuilding179
83.8%
New Build206
82.5%
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What the data tells us

1
93.0% of rear extension applications in Chesterfield get approved. That means 58 homeowners since 2020 have been refused. Not terrible odds, but not a foregone conclusion.
2
Your ward matters more than you think. The 11.1% gap between Walton (100.0%) and Brampton West & Loundsley Green (88.9%) 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

58 rear extension applications in Chesterfield 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 Chesterfield planning data

Nearby councils rear extension data

Methodology: Based on 824 planning decisions classified as rear extensions in Chesterfield, 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 Chesterfield Council's public planning portal. Full methodology →
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