Search issued building permits across the SF Peninsula and adjacent Silicon Valley cities. Filter by city, keyword (address, project type, scope description, contractor, architect or permit number) and minimum valuation. Use this to find what construction has actually been permitted at an address or in a city.

List active listings that are eligible for an SB 9 lot split or duplex conversion, with the per-parcel block reasons where they are not. California-only; this is a parcel-level buildability read, not a generic lead list.

List parcels ranked by ADU (accessory dwelling unit) feasibility, including estimated max units, buildable square footage and the lot geometry behind the score.

List underbuilt parcels: small, older homes using a low share of their allowable building envelope on sizable lots. Ranked by redevelopment score, with the FAR headroom that produced it.

Search for high-signal real estate investment opportunities (teardowns, flips). Use this to find properties before diving into specific details.

Get detailed AI intelligence for a specific property. Returns teardown probabilities, flippability scores, comparable sales, and a developerROI field. Takes an id from list_market_signals. Treat developerROI as an AI screening estimate for ranking only, not as underwriting: it is a model output rather than arithmetic, and it disagrees materially with a build-to-zoning proforma on much of the inventory. Do not quote it as an expected return.