Where this answer comes from.
Each of these has its own page naming the office that publishes it, how often it updates, and what it cannot answer. Rebuilt from the ParcelOps source directory on September 9, 2026.
US Municipal Open Data Discovery
Find local property datasets or search normalized permit, inspection, and violation events in five US markets.
Census Building Permits
County-level residential building-permit authorizations, units, and construction value.
NYC Property Timeline
One BBL timeline across recorded documents, permits, housing violations, and executed evictions.
Where this stops.
The part a search result will not tell you, and the part worth reading before this answer goes into a decision.
- A missing permit history means the city does not publish, not that no work was done. Unpermitted work is invisible everywhere by definition.
- Field names and permit types differ from city to city even after normalization, so a type in one market is not the same thing as the same word in another.
- County level authorization counts describe construction activity in an area. They say nothing about one address.
Questions people ask alongside this one.
Is this address in a qualified census tract or difficult development area?
Housing credit designations are annual, so the answer needs a year attached. What a designation changes in a deal, and who actually decides an award.
What hospitals and nursing homes are near this property?
Medicare enrolled facilities with published ratings. Nursing homes carry coordinates so distance is real; hospitals do not, so that side is a city, zip, or state list.
What census tract is this address in?
Federal program designations are published by census tract, not by address. How to resolve an address to its state, county, tract, and block codes, and why the vintage matters.
Is this property in a flood zone?
A flood zone answer is a letter read off a specific FEMA map panel with an effective date. What each zone means, and why outside a zone is not the same as safe.
Are there wetlands on this property?
The national wetlands inventory is a map layer compiled from imagery, not a jurisdictional determination. What the classification codes mean and where the layer stops.
Is this property in a wildfire risk area?
There is no national wildfire zone the way there is a flood zone. What the modeled risk metrics at a point actually describe, and what decides one house.
The lanes this question belongs to.
A lane page lists every source that kind of work reads, not only the ones behind this question, and states where the whole lane stops.
Run it on a property you already know.
The free plan includes 50 tool calls for the life of the account. They never expire and never refill, and there is no credit card. Ask this question about an address whose answer you can check.