ADU-Qualifying Construction
Accessory dwelling units — backyard cottages + garage conversions.
31K permits classified across 2 metros
Browse adu-qualifying construction permits in Los Angeles →What it covers
ADU-qualifying permits cover accessory dwelling units — backyard cottages, garage conversions, attached and detached ADUs that meet local zoning thresholds. A high-growth segment in West Coast metros where state-level legislation (e.g. California SB 9 / SB 10) has streamlined approval. Used by realtors, ADU specialists, and policy researchers to track urban-infill density trends.
How a permit lands in ADU-Qualifying Construction.
Every silver permit flows through a two-stage classifier. The deterministic stage maps the structured signals — work_class, the normalized permit type, and the building sub-type — into the segment vocabulary where the mapping is unambiguous. The machine-learning stage handles the cases that aren't direct lookups: multi-vocab permit-type strings, ambiguous occupancy spans, and jurisdictions that bundle categories. The segment is the classifier's output, the same axis across every metro — so adu_qualifying means the same thing in NYC as in LA even though the upstream jurisdictions emit completely different raw permit-type strings.
When the signal genuinely isn't there, we say so. A row with no assignable segment degrades honestly — to its work-nature, then to its raw source type, and only to “Unclassified” when truly nothing is known. We never guess a segment to fill a gap; an honest Unclassified is the floor, and field-level data-quality flags surface when the classifier had low confidence. That restraint is the point — the classification is only worth selling on if the “don't know” is honest.
ADU-Qualifying Construction by metro — where it’s moving
Where adu-qualifying construction permits are classified today, ranked by volume — with each metro’s momentum (the last 90 days vs the prior 90) so you can see where the segment is heating up in your territory. Momentum shows only where we have enough filings to stand behind it. Metros with recent activity link straight into the live browse.
-12% vs prior 90d
- Los Angeles →-12%28K
- San Francisco →-11%2,890
Who tracks ADU-Qualifying Construction.
ADU-Qualifying Construction is a sales-intelligence segment for manufacturers and distributors selling into residential remodels and new homes. Filter it by metro, rank the contractors pulling these permits, and see the projects worth selling into — the same way across every covered market.