Roof-Permit Coverage — National

Data refreshed: 2026-05-17 · 511 counties analyzed · regenerated every 4–6 months

Total Single-Family Homes

24,801,212

SFH with ≥1 Roof Permit

4,920,113

National Coverage

19.8%

Counties (run so far)

511

Counties, no quality flag

277

Clean share

54.2%

INVARIANT_FAIL (must be 0)

0

JOIN_GAP (must be 0)

0

This is an FA-anchored coverage diagnostic, not a model feed: the denominator is every First American SFH parcel; the numerator is those matched to ≥1 BuildZoom roof permit. A low number is "no permit data here" made legible, not "no roof work happened." Methodology: finding 73.

Coverage % by county

Roof-permit coverage % (FA SFH matched)

Data-quality flag by county

CLEAN = no flag. Others mark a dimension to read with care (see the caveat below). The map is categorical; use the legend labels, not colour intuition.

Primary quality flag by county

Flag frequency

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Read-with-care caveat. by-FIPS and by-SitusCity views are reliable as-is. by-Municipality is dirty nationally — fragmented names, district/ward codes, and high-null counties (see flags MUNI_FRAGMENTED, MUNI_DISTRICT_CODED, HIGH_NULL_MUNI). Quote per-municipality numbers only for counties with no MUNI_* flag, or use SitusCity. Acceptance gate: INVARIANT_FAIL and JOIN_GAP must be 0.

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