BuildRules/Vaughan/Secondary suite / ADU

Vaughan project guide

What do you need for a secondary suite in Vaughan?

Check Vaughan secondary suite and ADU requirements for eligible homes, zoning, parking, building permits, drawings and inspections.

1 min readReviewed Oct 1, 2026

The short answerConditional

A new secondary suite must satisfy Vaughan zoning requirements and use the building permit process before construction.

Vaughan’s process begins with property eligibility and zoning. Newer units use the Building Code permit route, while older existing units can involve Fire Code review.

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Know what matters

What changes the answer.

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

ZoningMust complyConditional

Vaughan states that a secondary suite must comply with its Zoning By-law and limits eligibility to specified dwelling types and locations.

Official sourceCity of VaughanHow to Get a Secondary Suite / ADU · Zoning criteria and building permit route

Verified2026-10-01Open proof

New secondary suiteBuilding permit requiredConditional

For a new unit, Vaughan directs owners to submit a building permit application with professionally prepared drawings.

Official sourceCity of VaughanHow to Get a Secondary Suite / ADU · Zoning criteria and building permit route

Verified2026-10-01Open proof

ParkingAdditional parking is part of the zoning criteriaInfo

The City states that one additional properly surfaced parking space is required per additional residential unit under the cited criteria.

Official sourceCity of VaughanHow to Get a Secondary Suite / ADU · Zoning criteria and building permit route

Verified2026-10-01Open proof

Your preparation checklist

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Building permit application
Professionally prepared construction drawings
Zoning and parking information
Applicable plumbing/mechanical information
Other property-specific approvals

Open the focused permit checklist

Fees and timing

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

FeesConfirm the current Vaughan fee schedule for the exact permit class.

Next steps

Check dwelling and property eligibility
Confirm parking and zoning conditions
Prepare the permit drawings
Apply before construction and complete required inspections

Same project, different city

See how this rule changes across Ontario.

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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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