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Rear Extension Approval Rates in South Lanarkshire

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 5,006 real decisions tell us about rear extension outcomes in South Lanarkshire.

5,006 real decisions·January 2020 to September 2026·Updated September 2026
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Approval Rate
5,006
Decisions
–
Approved
–
Refused
– approved. But – 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 South Lanarkshire.

TypeDecisionsRate
New Build4,126
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Rear Extension5,006
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Conservatory820
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Change of Use (Residential)1,819
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Extension (General)2,293
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Side Extension2,361
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Outbuilding1,148
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Garage / Parking4,818
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Dormer1,280
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Basement60
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Front Extension431
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Annex93
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Flat Conversion98
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Loft Conversion51
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Wraparound Extension328
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See how this applies to your postcode →

What the data tells us

1
– of rear extension applications in South Lanarkshire get approved. That means – 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

– rear extension applications in South Lanarkshire 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 South Lanarkshire planning data

Methodology: Based on 5,006 planning decisions classified as rear extensions in South Lanarkshire, 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 South Lanarkshire Council's public planning portal. Full methodology →
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