ADU Feasibility in Mississauga, Brampton & Vaughan (GTA)

Zoning limits, typical rent, and 5%-down CMHC Prefab Plus financing for accessory dwelling units in Greater Toronto Area — checked against 2026 by-laws and market data.

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Zoning Rules for Mississauga, Brampton & Vaughan (GTA)

Max ADU Size
600 sq ft
Rear Setback
1.8 m
Side Setback
0.6 m
Max Height
4.5 m

As-of-right status: Varies by city. Varies significantly by city: Brampton 35–80 m² depending on zone, Vaughan ~80–90 m², Mississauga follows its own accessory-structure limits.

The GTA is not one zoning authority — Mississauga, Brampton and Vaughan each set their own rules. Confirm your specific municipality before finalizing a design.

Source: Brampton, Vaughan, Mississauga zoning by-laws, 2026

⚠️ Preliminary estimate based on publicly available zoning by-laws as of 2026. Your lot, tree by-laws, and recent amendments may change what applies. Our $497 Feasibility Report includes a verified zoning review for your exact address.

Typical Mississauga, Brampton & Vaughan (GTA) ADU Rent (2026)

Studio
$1,550/mo
1-Bedroom
$2,025/mo
2-Bedroom
$2,420/mo

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Financing: CMHC Prefab Plus (5% Down)

As of 2026, CMHC insures mortgages for prefab/modular ADU construction with as little as 5% down and staged funding across 4 milestones — the same terms as buying a regular home.

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Mississauga, Brampton & Vaughan (GTA) ADU — Frequently Asked

Are ADU rules the same across Mississauga, Brampton and Vaughan?
No. Each city sets its own maximum size, setback and height rules. Brampton, for example, allows up to 80 m² in rural-type zones but caps most residential zones at 35 m², while Vaughan allows roughly 80–90 m².
What does a typical GTA ADU rent for?
Around $2,025/mo for a 1-bedroom and $2,420/mo for a 2-bedroom unit as of 2026, though this varies by specific city and neighbourhood.
Can I finance a GTA ADU with 5% down?
Yes, through CMHC Prefab Plus if you and the ADU are on the same insured mortgage and you occupy the property full-time.

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Our $497 Feasibility Report confirms your exact zoning, realistic cost, and permit pathway for your Mississauga, Brampton & Vaughan (GTA) property within 48 hours.

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