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Rear Extension Approval Rates in Derbyshire Dales

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 294 real decisions tell us about rear extension outcomes in Derbyshire Dales.

294 real decisions·January 2020 to September 2026·Updated September 2026
91.8%
Approval Rate
294
Decisions
270
Approved
24
Refused
91.8% approved. But 24 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 Derbyshire Dales.

TypeDecisionsRate
Conservatory113
93.8%
Side Extension198
93.4%
Extension (General)565
92.9%
Rear Extension294
91.8%
Outbuilding165
91.5%
Front Extension46
89.1%
Garage / Parking410
88.5%
Change of Use (Residential)169
87.0%
New Build190
85.3%
Dormer73
84.9%
Loft Conversion23
78.3%
See how this applies to your postcode →

What the data tells us

1
91.8% of rear extension applications in Derbyshire Dales get approved. That means 24 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

24 rear extension applications in Derbyshire Dales 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 Derbyshire Dales planning data

Methodology: Based on 294 planning decisions classified as rear extensions in Derbyshire Dales, 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 Derbyshire Dales Council's public planning portal. Full methodology →
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