Parcel intelligence · All 50 states
Know what you can build before you buy the lot.
The zoning ordinance, read at the parcel level — district, buildable envelope, and a massing of what actually fits. Every figure carries its citation.
Zoning works differently in every state — we're mapping all of them
There is no national zoning code. Every state hands the power somewhere different — enabling acts, home-rule carve-outs, statewide ADU and TOD preemptions, county-versus-municipal control — and the district names, the FAR conventions and the setback arithmetic change at every border. So we do it state by state. Illinois is the finished shape of that work: the ordinance read down to the parcel, feasibility live in the app. Every other state has its free, cited zoning reference up now, and a waitlist on it — the parcel layer lands in the order the demand does.
See all 50 states → — and tell us where you're building. The parcel layer lands in the order the demand does, so the waitlist on each state page is what decides the next market.
How deep it goes, using Chicago as the example
Chicago is the finished shape of the work, so it is the clearest way to show what the parcel layer means in a market once we have built it. We publish the rules we compute on. 53 district pages across 7 families — FAR, height, lot area per unit, setbacks, parking — each figure flagged verified where it matches the ordinance table verbatim, or approximation where the Code uses a contextual formula. Updated snapshot: 2026-08-24.
- All 53 Chicago zoning districts — the hub, grouped by family.
- RS-3, RT-4, B3-2 — the districts most of Chicago's infill happens in.
- Connected Communities / TOD — the 2022 ordinance that cuts parking and boosts density near transit.
- ADUs & coach houses — where a second unit is legal, and under what limits.
- The ARO in zoning — how affordability requirements thread through entitlements and bonuses.
Behind the reference sits the parcel layer: 2.62M parcels across 255 ingested jurisdictions in the Chicago metro, with all 1,396 Illinois jurisdictions tracked for coverage.
From address to answer
- The parcel. Lot lines, dimensions and zoning district from the county and city records — not a guess from a map screenshot.
- The rules. The district's bulk and density standards, plus the overlays that bend them: TOD service tiers, designated bus corridors, preservation districts.
- The envelope. FAR, height, setbacks and lot-area-per-unit resolved into a buildable envelope — and a massing scheme generated inside it, with unit count and parking.
- The receipt. A feasibility report where every number carries its Municipal Code citation, checkable line by line.
Who it's for
Developers screening infill sites before the offer. Brokers who want a credible "here's what this lot supports" package next to the listing. Architects checking a client's site before concept work. Attorneys and expediters who need the § citation, not a paraphrase.