Permission first. Construction second.
Newmarket requires zoning confirmation and building permits for ARUs and also maintains a municipal registration process for approved units.
Check a Newmarket property by address.
Enter a street address. We’ll match it to Newmarket and show available municipal planning information that requires independent verification.
Uses Natural Resources Canada’s national Geolocator to match the address. Any planning result is preliminary and must be checked against the current municipal bylaw and permit office.
What to verify before building in Newmarket.
This is the simple build-direction summary. The exact property still has to meet its zoning, site, servicing and permit requirements.
Before you build: confirm the exact property, zoning and permit path with Newmarket.
Confirm local zoning before you estimate project costs.
This guide explains the municipal process, not whether your specific property is approved. The next two steps are budgeting and contractor scoping; neither replaces municipal approval.
Planning sequence: rules → budget → written scope / contractor. Cost models and contractor matching do not determine whether the municipality will approve the work.
Municipal zoning: verified research register
Governing municipal bylaw: Zoning Amendment 2026-10
Suite and ADU rules: Principal dwelling plus up to two ARUs (two attached, or one attached and one detached). Detached ARU floor-area cap is the lesser of 10% of lot or 75 m² for one storey; 100 m² for two storeys. One exterior parking space per ARU.
Property-level determination: These figures are conditional on the current zoning district, lot servicing, and any overlays. Provincial housing legislation is background; the adopted local bylaw controls. Unverified requirements: Requires manual municipal check.
How this guide was verified
Guide verification: Official-source research summary. This guide provides linked municipal research; a complete enacted-bylaw, zoning-map and amendment cross-check has not been documented for this municipality.
Property confidence: Not assessed. City-wide guidance does not confirm permission for a particular parcel. Check official zoning, overlays and permits. How verification works →
Municipal evidence check — October 12, 2026
Checked against municipality-published material: The posted 2026-10 amendment provides for a maximum of two ARUs per qualifying residential lot, with two attached or one attached and one detached; exclusions include mapped hazards and listed Oak Ridges Moraine zones.
Outstanding: Confirm final in-force status and application to the exact parent zoning bylaw and parcel, including setbacks, access and registration.
Verification status: Targeted municipal-source check completed. This is not an independent certification of all enacted bylaw amendments, zoning maps or any individual property.
Official Newmarket sources
Reviewed October 7, 2026. This is a planning summary, not a permit decision. Confirm current zoning, servicing, title constraints and permit requirements for the specific property before design or construction.