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Detroit building permits

Detroit is a residential alteration town — that one segment carries most of what gets filed, with commercial alteration and single-family new build making up the bulk of the rest. Relative to the rest of our coverage, Detroit is 2.6× as heavy on residential alteration. Segment by segment the quarter looks like the one before it, residential alteration a shade stronger. Field-level data-quality flags throughout; older history via free signup or the API.
40,329 building permits classified · field-DQ-cleared · refreshed nightly

42,529 building permits in Detroit. Use Explore the data below for the filterable view.2,200 of these are classified by work type but not routed to a segment, so the breakdown below counts 40,329.

Explore the dataGet API access
Where the value concentratesDetroit
Permit mix by segment
Reliable value by segment
Filing momentum
Prior 90d1,261
Last 90d1,418

+12% vs prior 90d

Based on filings in the source's current publication window — not the all-time indexed total.

LiveLast 10 days of permits · parcel-joined · 26 IBC segments · field-level DQ flags
26 IBC segments tracked4 active in Detroit4 refreshed in the last 14 dayssee per-segment freshness →
index rebuilt yesterday
Why this data is real

We classify permits into real segments — and label what we don't know.

Classified, not scraped

We read each permit's work-type, scope, and occupancy fields to place it in a real segment — so “commercial HVAC in Detroit” means real HVAC work, not a keyword match.

Parcel-joined + enriched

Every permit is joined to its tax lot and geocoded, with roof & HVAC sized — you see the building, not just the address.

— and we flag what we don't know

Coverage is labeled, missing fields show —, and where there are too few reliable filings to stand behind a value we publish —, never a fabricated number.

Detroit by segment

Sourced from the segment-distribution artifact · Each links to that segment in Detroit
Residential Alteration33,937Commercial Alteration5,210Residential New (Single-Family)826Commercial New Construction356

22 segments: no permits in window.

Classification scopeDetroit's trades, demolition, and plan-review permits are available as raw data via the API but not yet segment-classified. The segment breakdown above covers Detroit's building permits.

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Coverage: Live · refreshed nightlyDevelopers — query the permit API →Get Detroit permits via API or bulk export (Parquet / CSV) →