San Francisco Bay Area seller signals from public records

San Francisco notices of violation (DBI)San Francisco, CA

Active notices of violation from the Department of Building Inspection, mostly Housing Inspection Services (residential), updated daily. No owner names.

Sonoma County tax-defaulted parcelsSonoma County, CA

Secured parcels in tax default that have not been redeemed (about 7,500, back to 2014; the detail is the unpaid tax year). Defaults five or more years old can be sold at the county's tax sale. Owner names are not published; the mailing address is.

San Francisco active DBI Code Enforcement Section complaintsSan Francisco, CA

Active Building Inspection complaints assigned to DBI's Code Enforcement Section since 2022 (about 3,400): cases referred on after a notice of violation was not abated, plus direct complaints about unpermitted work, illegal units and blighted or vacant buildings. Updated daily. Overlaps the sf-dbi-violations feed on some buildings, which stacks the signals. No owner names; the detail is the complaint text.

San Francisco soft-story buildings out of complianceSan Francisco, CA

Wood-frame apartment buildings (5+ units, 3+ stories) under the mandatory soft-story seismic retrofit program that DBI lists as non-compliant (about 230): the owner never finished the required retrofit and faces placarding and liens. A tired-landlord list.

San Francisco residential repair, foundation and demolition permitsSan Francisco, CA

Building permits issued on houses, two-flats and apartment buildings for plan-checked additions, alterations and repairs, demolitions, and over-the-counter jobs for fire damage, dry rot, foundations or to comply with a notice of violation (about 180 a month), updated daily. Routine over-the-counter work (kitchens, water heaters, solar) is left out. Pre-sale repairs are a weak signal on their own; best stacked with violations.

Marin County open code enforcement casesMarin County (unincorporated), CA

Open County of Marin code enforcement cases (land use, unpermitted building, septic and housing) in unincorporated areas, about 460 with a street address (parcels with no situs address are left out). The city is the postal community (San Rafael, Novato, Sausalito, Marshall). No owner names.

Marin County residential remodel, reroof and demolition permitsMarin County (unincorporated), CA

Residential building permits issued by the County of Marin (unincorporated areas, shown with their postal city) for remodels, reroofs, siding, foundations, minor repairs and demolitions (about 130 a month), updated daily. The feed merges two permit systems, so the work type is in either the fee title or the construction field. Pre-sale repairs are a weak signal on their own. No owner names.

San Jose active residential alteration, reroof and demolition permitsSan Jose, CA

Open (not yet finaled) building permits on houses and apartment buildings for additions/alterations, reroofs and demolitions (about 4,000), refreshed daily. Includes the owner of record (some rows say NONE). The address carries the ZIP. Pre-sale repairs are a weak signal on their own.

Gilroy open code enforcement casesGilroy, CA

Open City of Gilroy code enforcement cases (blight, unpermitted work, garbage and weeds; fireworks and fee cases left out), about 230. The detail is the complaint text.

Alameda County out-of-state homeownersAlameda County, CA

Houses, townhomes and 2-4 unit buildings countywide (Oakland, Fremont, Berkeley, Hayward, Livermore and the rest) with no homeowners' exemption whose tax bill mails outside California (about 3,100). Condos are left out because the unit number can't be carried. Assessor roll as republished daily by the Alameda Countywide Clean Water Program. California publishes no owner names; the mailing address is included.

Alameda County non-owner-occupied homes unchanged since before 1995Alameda County, CA

Houses, townhomes and 2-4 unit buildings with no homeowners' exemption whose latest recorded document (usually the deed) is from before 1995 (about 3,500): rentals and inherited homes held 30+ years. The detail is the use code and the year of that document. No owner names; the mailing address is included.

Contra Costa County out-of-state homeownersContra Costa County, CA

Single-family homes, townhomes, duplexes, triplexes and fourplexes countywide (San Ramon, Richmond, Concord, Antioch, Walnut Creek and the rest) with no homeowners' exemption whose tax bill mails outside California (about 4,000). From the county assessor's parcel map service (deeds recorded through August 2026 on 2026-11-01). No owner names; the mailing address is included.

Contra Costa County non-owner-occupied homes held since before 1995Contra Costa County, CA

Homes and 2-4 unit buildings with no homeowners' exemption and a last deed recorded before 1995 (about 2,600, most in Richmond, Concord, Antioch and Pittsburg): rentals, vacant and inherited homes held 30+ years. The detail is the use and the deed date. No owner names; the mailing address is included.

Napa County non-owner-occupied homes unchanged since before 2000Napa County, CA

Houses, rural homes and 2-4 unit buildings countywide (City of Napa, American Canyon, St. Helena, Calistoga, Yountville, unincorporated) with no homeowners' exemption and a current ownership document recorded before 2000 (about 1,500). The detail is the use and the document number, which starts with its year. Assessor data as republished daily by the City of Napa.