ADU Feasibility in London & Kitchener-Waterloo

Zoning limits, typical rent, and 5%-down CMHC Prefab Plus financing for additional dwelling units in Southwestern Ontario — checked against 2026 by-laws and market data.

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Zoning Rules for London & Kitchener-Waterloo

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

As-of-right status: Likely, confirm locally. ~80 m² (estimated from Kitchener-Waterloo regional data — London-specific by-law not separately confirmed).

We use neighbouring Waterloo Region data as an estimate for London — always confirm directly with the City of London before finalizing plans.

Source: Kitchener/Waterloo zoning by-laws, 2026 (regional proxy)

⚠️ 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 London & Kitchener-Waterloo ADU Rent (2026)

Studio
$1,300/mo
1-Bedroom
$1,700/mo
2-Bedroom
$2,100/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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London & Kitchener-Waterloo ADU — Frequently Asked

What is the maximum ADU size in Kitchener?
The lesser of 80 m² (861 sq ft), 15% of the total lot area, or 50% of the existing house square footage.
Is London, Ontario ADU-friendly?
London follows Ontario's provincial Bill 23 framework; we recommend confirming exact figures with the City of London planning department since local data is less published than in Kitchener-Waterloo.
What rent can I expect in London/KW?
Roughly $1,700/mo for a 1-bedroom and $2,100/mo for a 2-bedroom unit as of 2026.

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Our $497 Feasibility Report confirms your exact zoning, realistic cost, and permit pathway for your London & Kitchener-Waterloo property within 48 hours.

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