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Residential Addition permits across the US

We index 370,947 Residential Addition permits across 23 US metros in 16 states — led by Los Angeles, Washington, DC, Austin. Every permit is classified into a real segment, parcel-joined, and flagged for data quality.

Activity concentrates in California (43%), Texas (20%), Washington, DC (15%).

Residential Addition permits by metro

Counts are live from the classified index, refreshed nightly. Each metro links to its full Residential Addition breakdown — recent permits, contractors, and the raw feed.