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Rear Extension Approval Rates in Dartmoor NPA

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 222 real decisions tell us about rear extension outcomes in Dartmoor NPA.

222 real decisions·January 2020 to present·Updated March 2026
92.8%
Approval Rate
222
Decisions
206
Approved
16
Refused
92.8% approved. But 16 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 Dartmoor NPA: West Devon approves 80.0% of rear extension applications while Teignbridge sits at 60.0%. That 20.0% gap means your postcode is one of the strongest indicators of outcome.

Rear Extension approval rate by ward

#WardDecisionsApprovedRate
1West Devon54
80.0%
2Teignbridge53
60.0%
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These are council averages. Your property is specific.

A rear extension has a 80.0% approval rate in West Devon but just 60.0% in Teignbridge.
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 Dartmoor NPA.

TypeDecisionsRate
Rear Extension222
92.8%
Side Extension172
92.4%
Conservatory139
92.1%
Extension (General)658
91.2%
Dormer116
90.5%
Front Extension21
90.5%
Outbuilding380
90.3%
Garage / Parking573
89.5%
Loft Conversion54
85.2%
Annex81
77.8%
New Build160
73.8%
Change of Use (Residential)311
72.0%
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What the data tells us

1
92.8% of rear extension applications in Dartmoor NPA get approved. That means 16 homeowners since 2020 have been refused. Not terrible odds, but not a foregone conclusion.
2
Your ward matters more than you think. The 20.0% gap between West Devon (80.0%) and Teignbridge (60.0%) 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

16 rear extension applications in Dartmoor NPA have been refused since 2020. Many of those homeowners had already paid for drawings and application fees. A £79 report shows you what gets approved — and what gets refused — near your property.

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More Dartmoor NPA planning data

Nearby councils rear extension data

Methodology: Based on 222 planning decisions classified as rear extensions in Dartmoor NPA, 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 Dartmoor NPA Council's public planning portal. Full methodology →
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