Look up any address
Status, designation by-law, and the municipal source with the date it was current, for every property we track.
Search the map81 days until listed properties come off Ontario's heritage registers
Know what’s protected before Ontario’s heritage registers change.
Look up any address, see its heritage status and where that comes from, and get an email when it changes.
- Free to search
- From municipal registers and open data
- Updated daily
46,985
properties on the map
17,238
listed properties facing the deadline
25
with designation under way
41
municipalities, and growing
The deadline
What changes on January 1, 2027
About 36,000 Ontario properties are listed on municipal heritage registers without being designated (Active History). Listing is light protection: it mainly means an owner must give the city 60 days' notice before demolishing (Ontario Heritage Act, s. 27).
- Listed properties come off the register. On January 1, 2027, listed properties are removed from municipal registers.
- Unless council moves to designate. A property stays if council has issued a notice of intention to designate it.
- And they can't be relisted for five years. Once removed, a property can't go back on the register until 2032.
How it works
One map, sourced to every register
Watch what matters to you
Follow a property, a street or a whole ward. We check registers, council agendas, notices and permits every day and email you when something changes.
Set up alertsAct on it
Volunteers build the research a city needs to designate, heritage groups share the work, and municipal staff keep their register current.
Save a buildingWho it's for
For the people and places that keep Ontario's heritage
Heritage groups and volunteers
Spot the buildings closest to losing protection, organize your group's work, and build the research record that makes the case for designation.
Municipal staff and heritage committees
Keep your register current, see permits and applications at heritage properties, track deadlines, and receive volunteers' research, at no cost.
Owners and neighbours
Find out if a building is listed or designated, what that means for repairs and changes, and whether that changes in January.
Journalists and researchers
Track designations, removals and demolitions across municipalities, with a source behind every number.
Free for volunteers
Save This Building
Cities can't research every listed property before the deadline: Toronto evaluates about 50 to 60 a year against roughly 3,700 facing removal (City of Toronto). Volunteers can help.
- Start from what the city already knows: year built, history, legal description.
- Work through the nine criteria councils use to decide on designation.
- Collect sources and photos, then print a record ready to submit.
- Publish it to the public archive, so the research survives whatever happens to the building.
About
Heritage status shouldn't be hard to find
In Ontario, the answer to whether a building is protected is spread across hundreds of separate registers, PDFs and council agendas. The Patina Record brings them together, so municipalities, heritage groups, owners and neighbours start from the same facts.
We started with the January 1, 2027 deadline because it changes the status of more Ontario properties at once than anything before it. The map, Save This Building and the tools for heritage groups and municipalities are free.
How we work
- Every record shows its source and date. You can always click through to the municipal register, notice or dataset it came from.
- We use data the way each city allows. Open data under its licence; where there isn't one, we ask.
- We say when it's stale. If a city's data is old, the date is right there.
- It isn't legal advice. Confirm status with the municipality before you rely on it.
Today we cover 41 municipalities and 46,985 properties, with more coming as cities share their registers. See our coverage.
Get updates as more cities come online
New municipalities, the January 1 removals, and tools for heritage groups, municipalities and owners.