BuildRules/Oshawa/Deck

Oshawa project guide

Do you need a permit for a deck in Oshawa?

Check Oshawa deck permit rules, including the low uncovered deck exemption for houses.

1 min readReviewed Oct 1, 2026

The short answerConditional

Oshawa lists sundecks, decks and porches as permit-required, but a house deck 600 mm or less above ground with no roof is permit-exempt.

Height and roof coverage determine whether the house-deck exemption applies.

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Know what matters

What changes the answer.

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

Deck / porchPermit requiredConditional

Oshawa lists building a sundeck, deck or porch among projects requiring a building permit.

Official sourceCity of OshawaBuilding Permits · Residential permit triggers and project resources

Verified2026-10-01Open proof

Low uncovered house deckPermit not required at 600 mm or lessConditional

A deck 600 mm or less above ground and without a roof is listed as permit-exempt for houses.

Official sourceCity of OshawaBuilding Permits · Residential permit triggers and project resources

Verified2026-10-01Open proof

Application typeDeck/porch/ramp/balcony/walk-upInfo

Oshawa provides a specific application class when this is the primary project scope.

Official sourceCity of OshawaBuilding Permits · Residential permit triggers and project resources

Verified2026-10-01Open proof

Your preparation checklist

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Building permit application where required
Deck construction drawings
Site information
Applicable owner authorization

Open the focused permit checklist

Fees and timing

TimelineConfirm the current municipal review timeline after the application is accepted as complete.

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

Next steps

Measure height above ground
Confirm roof coverage
Prepare the deck drawings
Submit under the deck application type when required

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 deck rules by city

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

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BuildRules principle

Do not confuse “no permit” with “no rules.”

Zoning, overlays, safety rules and other constraints can still apply.

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