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Rear extension approval rates in St Helens

Rear extensions are among the most common householder applications. This page covers 128 rear extension decisions in St Helens.

128 real decisions·July 2010 to October 2026·Updated October 2026
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Approval Rate
128
Decisions
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Approved
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Refused
– approved; – refused, July 2010 to October 2026. The ward figures below show where in St Helens the refusals fall.

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Why rear extension approval rates matter

Councils decide rear extensions often, so local precedent is well established. Refusals nearby form part of that precedent.

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 St Helens.

TypeDecisionsRate
Rear extension128
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Conservatory30
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Garage and parking82
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Side extension79
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Change of use (residential)57
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Other extension26
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Dormer31
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Wraparound extension23
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See how this applies to your postcode →

What the data tells us

1
– of rear extension applications in St Helens get approved. – were refused, July 2010 to October 2026.
3
A council average is a starting point. Officers weigh precedent, character and the context of the street, so decisions near your property are the closer guide.

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More St Helens planning data

Nearby councils rear extension data

Methodology: Based on 128 planning decisions classified as rear extensions in St Helens, July 2010 to October 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 St Helens Council's public planning portal. Full methodology →
Check planning approval patterns in St Helens