London Shed Permit: 15 m² Storage-Shed Exemption

Do you need a permit for a shed in London, Ontario?

Check London shed permit rules for the 15 m² threshold, one-storey storage use, attachment and plumbing.

1 min readReviewed Oct 1, 2026

The short answerConditional

A shed can be permit-exempt when it is under 15 m², one storey, free-standing, storage-only and has no plumbing.

A shed outside any of those conditions requires permit review, and zoning still applies.

Make this useful for my project

Know what matters

What changes the answer.

Start with these conditions. The official reference is attached to each one.

Qualifying small shedPermit not required under 15 m² when all listed conditions are metConditional

London exempts a shed under 15 m² when it is one storey, free-standing, storage-only and without plumbing.

Official sourceCity of LondonBefore you apply for a building permit · Residential permit triggers, exemptions and review timelines

Verified2026-10-01Open proof

Over 15 m²Permit requiredConditional

London lists sheds greater than 15 square metres as permit-required.

Official sourceCity of LondonBefore you apply for a building permit · Residential permit triggers, exemptions and review timelines

Verified2026-10-01Open proof

PlumbingPermit requiredConditional

The City states that a building or structure of any size with plumbing requires a building permit.

Official sourceCity of LondonBefore you apply for a building permit · Residential permit triggers, exemptions and review timelines

Verified2026-10-01Open proof

Your preparation checklist

Your preparation progress

0 of 4 ready

Your progress is saved in this browser. Come back whenever you’re ready.

Building permit application where required
Site plan
Structure drawings
Plumbing information where applicable

Open the focused permit checklist

Fees and timing

TimelineLondon lists a 10-business-day statutory review timeline for sheds servicing houses once the application is complete.

FeesConfirm the current London permit fee for the exact project class before filing.

Next steps

Measure shed area
Confirm one-storey, free-standing and storage-only conditions
Confirm plumbing
Apply if the exemption does not apply

Same project, different city

See how this rule changes across Ontario.

Compare the source-reviewed answer for this project across every municipality BuildRules currently covers.

Compare shed rules by city

Better decisions, together

Get everyone on the same page.

Send this to your designer or contractor before agreeing on the scope.

Do you need a permit for a shed in London, Ontario?

A shed can be permit-exempt when it is under 15 m², one storey, free-standing, storage-only and has no plumbing.

What changes the answer.

Your preparation checklist

0 of 4 ready

Fees and timing

Next steps

See how this rule changes across Ontario.

Get everyone on the same page.

Your next useful question.

Do you need a permit for a deck in London, Ontario?