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Rear Extension Approval Rates in Torfaen

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 538 real decisions tell us about rear extension outcomes in Torfaen.

538 real decisions·January 2020 to present·Updated March 2026
95.2%
Approval Rate
538
Decisions
512
Approved
26
Refused
95.2% approved. But 26 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.

Rear Extension approval rate by ward

#WardDecisionsApprovedRate
1Abersychan55
100.0%
2Llanyrafon East And Ponthir55
100.0%
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These are council averages. Your property is specific.

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

TypeDecisionsRate
Conservatory248
98.0%
Rear Extension538
95.2%
Side Extension279
94.3%
Front Extension77
93.5%
Dormer133
92.5%
Outbuilding156
91.7%
Garage / Parking720
91.1%
Extension (General)771
90.5%
Loft Conversion80
90.0%
Wraparound Extension20
90.0%
Change of Use (Residential)165
89.7%
Annex29
86.2%
New Build78
80.8%
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What the data tells us

1
95.2% of rear extension applications in Torfaen get approved. That means 26 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

26 rear extension applications in Torfaen 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 Torfaen planning data

Nearby councils rear extension data

Methodology: Based on 538 planning decisions classified as rear extensions in Torfaen, 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 Torfaen Council's public planning portal. Full methodology →
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