A country-level snapshot of the onlyplans zoning corpus — cities, counties, states, building codes,
and supporting datasets — rolled up across all 50 states + DC. Live counts pulled from
data status;
same shipped/pending/stale/corrupted classification used by every domain page.
corpus · totals by domain
Cities
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Counties
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States
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Codes
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APIs
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distributions · atlas-domain tiers
Freshness
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City profiles by freshness tier. Volatile = TTL < 90d, standard = 90–365d, stable = year+.
State preempt depth
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Audited state preemption profiles by depth: thin (1–2 statutes), moderate, deep (4+).
Code adoption
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States by IBC/IRC/IEBC/IFC/IECC coverage: complete (4–5), partial (2–3), sparse (1), none (0).
map · explore the atlas
Interactive zoning atlas
Toggle layers for research status, state preemption laws, county boundaries, congressional districts, and metro areas.
Every dot links into the city's profile or research notes.
Per-API records live in zoning/apis/*.json. Each is tagged with a status
(shipped means already feeding atlas data or a generator; pending means scoped but not wired) and an
unlocks line that explains what county-level enrichment ships when it goes live.
deeper · per-domain pages
Data Status dashboard· full per-record table for every domain, with filters and freshness queues
US zoning stack· the 5-layer atlas spine and the 16-source data catalog feeding county enrichment
Building codes· IBC / IRC / IEBC / IFC / IECC adoption tracked across all states
State preemptions· statutes that override local zoning, audited per state
Federal overlays· FAA Part 77, DoD AICUZ, NFIP, ESA critical habitat, MAAMF
International· comparator profiles outside the US (Germany, Japan, Netherlands)
Glossary· terminology used across the atlas and city profiles
Methodology· how records get researched, verified, and shipped