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Baltimore building permits

The bulk of Baltimore filings are residential MEP, with residential alteration and residential demolition close behind. It files residential demolition at 4.7× the rate of a typical metro PermitCore covers. The clearest recent shift is in commercial alteration, 27% ahead of where it was a quarter earlier. Field-level data-quality flags throughout; older history via free signup or the API.
187,979 segment-eligible permits classified · field-DQ-cleared · refreshed nightly

205,185 segment-eligible permits in Baltimore. Use Explore the data below for the filterable view.17,206 of these are classified by work type but not routed to a segment, so the breakdown below counts 187,979.

Explore the dataGet API access
Where the value concentratesBaltimore
Permit mix by segment
Reliable value by segment
Filing momentum
Prior 90d3,580
Last 90d3,197

-11% 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 tracked9 active in Baltimore9 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 Baltimore” 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.

Baltimore by segment

Sourced from the segment-distribution artifact · Each links to that segment in Baltimore
Residential MEP112,358Residential Alteration41,541Residential Demolition17,576Commercial MEP6,701Commercial Alteration5,189Residential New (Single-Family)2,158Commercial Demolition1,873Commercial New Construction310Multifamily Alteration245Multifamily New Construction28

16 segments: no permits in window.

Classification scopeA meaningful share of Baltimore's permits — classified by work type but without a targeted segment (general alterations, repairs, and similar) — are queryable as raw data via the API but are not shown in the segment breakdown above, which covers Baltimore's segment-routed permits.

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