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California · San Francisco Bay Area · East Bay · #20 Most Populous County in the US
Alameda County, California
Government offices, property tax appeals, public records, courts, senior services, and local resources for Oakland, Berkeley, and East Bay residents
Affiliate disclosure: This page contains affiliate links. We may earn a commission if you use them, at no extra cost to you. Our editorial recommendations are independent of these relationships.
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Alameda County's assessment ratio means effective tax rates are low — but incorrect appraisals still cost money. Ownwell manages the appeal with no upfront cost.
What is the Alameda County property tax appeal deadline?
The annual appeal window runs July 2 through September 15 — one of the shorter windows among California's major counties. Applications must be filed with the Clerk of the Board at 1221 Oak Street, 5th Floor, Oakland, by the deadline. Before filing formally, contact the Assessor at 510-272-3787 for a free informal review. Ownwell can manage the appeal process and only charges if you save.
Where is Alameda County Probate Court?
Probate matters in Alameda County are primarily heard at the Berkeley Courthouse, 2120 Martin Luther King Jr Way, Berkeley (510-647-4439), and at the Hayward Hall of Justice, 24405 Amador St, Hayward (510-690-2700). The correct location depends on where the deceased resided. California probate is required when the gross estate exceeds $184,500.
How does Proposition 19 affect Alameda County homeowners?
For senior homeowners 55 or older, Prop 19 allows transfer of their Prop 13 base-year value to a new California home up to three times in their lifetime. Given how much East Bay properties have appreciated, this portability benefit can be worth tens of thousands of dollars annually. For heirs, Prop 19 (effective February 2021) limited the parent-child exclusion — children who inherit and do not use the home as a primary residence are assessed at current market value, not the parent's lower Prop 13 value.
What senior services does Alameda County offer?
The Alameda County Agency on Aging (510-577-3500) serves residents 60 and older with home-delivered meals, transportation, caregiver support, HICAP Medicare counseling, and the Long-Term Care Ombudsman program. Community-based organizations partner with the Agency to serve culturally specific communities across Oakland, Fremont, Hayward, and other county cities. In-Home Supportive Services (IHSS) helps qualifying seniors remain at home with funded care assistance.
Alert System: AC Alert; Wireless Emergency Alerts; Nixle; City-specific alert systems
Shelter Info: Multiple shelter locations throughout county; acgov.org/emsa for current shelter information; Red Cross coordination
FEMA Region: Region 9
Notes: East Bay county bordering San Francisco Bay; major earthquake risk (Hayward Fault – considered one of the most dangerous urban faults in the US; runs directly through population centers including Oakland, Hayden, Berkeley, Fremont); Oakland-Berkeley hills wildfire risk (1991 Tunnel Fire killed 25, destroyed 3,000+ homes; ongoing wildfire risk with climate change); Bay Area tsunami risk (distant source); Bay water flooding; industrial hazmat sites along the bay (refineries, ports); sea level rise threat
Roads & Utilities
ROADS & TRANSPORTATION
County Road: Alameda County Public Works Agency – (510) 670-5480
Public Transit: AC Transit (bus – (510) 891-4777); BART (Bay Area Rapid Transit – (510) 465-2278); Alameda and Oakland ferry services; Amtrak Capitol Corridor (Oakland/Emeryville hub); Caltrain connections via San Jose; Tri-Delta Transit (East County)
Airport: Oakland International Airport (OAK) – major Bay Area airport; San Francisco International (SFO) and San Jose (SJC) also serve county
Notes: Alameda County is densely networked with Bay Area transit; BART is the primary regional connector; the Bay Bridge (I-80) and San Mateo Bridge connect to the Peninsula; the county includes Oakland, Berkeley, Fremont, Hayward, Livermore, Pleasanton, San Leandro, San Lorenzo, Newark, Union City, Albany, Emeryville, Piedmont, Alameda city; traffic on I-80, I-580, I-880, I-238, SR-24, SR-92, SR-84 is intense
Business & Permits
BUILDING & PERMITS
Office: Alameda County Planning Department – (510) 670-5400 | acgov.org/planning
Services: Permits for unincorporated areas; each city (Oakland, Berkeley, Fremont, Hayward, Livermore, Pleasanton, San Leandro, Albany, Emeryville, Piedmont, Alameda, Newark, Union City, Dublin) has separate permit offices
Notes: Very active building environment driven by Bay Area housing crisis; ADU (accessory dwelling unit) construction significant; transit-oriented development near BART stations; Oakland’s development market is among the most active in the state
VA Medical: VA San Francisco (primary); VA Palo Alto; Oakland Vet Center – (510) 763-3904; Community-Based Outpatient Clinics in Oakland and Livermore
Services: Benefits claims, VA healthcare, county veterans services
Notes: Large veteran population in Oakland and throughout county; multiple VA access points; strong VSO network including VFW, American Legion, CalVet coordination
Libraries
LIBRARIES
System: Alameda County Library – (510) 745-1500 | aclibrary.org; Oakland Public Library (separate); Berkeley Public Library (separate); Fremont, Hayward, Livermore, Pleasanton, San Leandro, Emeryville each have city systems
ACL Branches: Albany, Castro Valley, Centerville, Dublin, Fremont (multiple), Niles, Newark, San Lorenzo, San Leandro, Sunol, Tri-Cities, Union City, and others
Services: Books, e-books, public computers, Wi-Fi, genealogy, maker spaces, recording studios, children’s programs, ESL classes; multilingual collections in Spanish, Chinese, Vietnamese, Tagalog, and other languages
Notes: Alameda County Library is one of the Bay Area’s major library systems; Oakland Public Library is separately operated and extensive; Berkeley Public Library is well-known for its progressive programming; the county’s diversity drives outstanding multilingual library services
Parks & Recreation
PARKS & RECREATION
County Parks: East Bay Regional Park District (EBRPD) – (888) 327-2757 | ebparks.org; 73 regional parks covering 125,000+ acres throughout Alameda and Contra Costa Counties; one of the finest regional park systems in the US
Key Parks: Tilden Regional Park (Berkeley hills – iconic Bay Area park; golf; botanical garden; Little Farm; steam trains; redwoods); Mission Peak Regional Preserve (Fremont – challenging popular hike; spectacular Bay views); Sunol-Ohlone Regional Wilderness; Del Valle Regional Park (Livermore area – lake; camping); Redwood Regional Park (Oakland hills – ancient coast redwoods); Lake Chabot
City Parks: Oakland’s extensive parks including Lake Merritt (urban lake; nationally renowned; 3.4-mile path); Berkeley Rose Garden; Joaquin Miller Park
Notable Attractions: Oakland Museum of California (outstanding state history and art collection); Jack London Square; USS Hornet (aircraft carrier museum at Alameda Naval Air Station site); Chabot Space and Science Center; Berkeley’s Telegraph Avenue and Gourmet Ghetto; Oakland’s Chinatown; Berkeley Marina
Notes: EBRPD is one of the finest regional park systems in the US – 73 parks with everything from bayside wetlands to oak-woodland peaks; Mission Peak’s challenging summit hike with its distinctive pole at the top is a Bay Area rite of passage; Lake Merritt in Oakland is a beloved urban jewel; UC Berkeley is one of the world’s great universities and its campus is itself a major cultural attraction; the East Bay’s food culture (Oakland’s diverse restaurants, Berkeley’s Chez Panisse legacy) is nationally recognized
GIS & Maps
GIS & MAPS
GIS Portal: Alameda County GIS – (510) 670-5400 | acgov.org/gis; open data at data.acgov.org; USGS earthquake hazard maps; CalFire fire hazard mapping; ABAG (Association of Bay Area Governments) regional planning maps
Notes: Bay Area is one of the nation’s leaders in animal welfare; low euthanasia rates; active rescue community; East Bay SPCA is a nationally recognized model shelter; Alameda city’s harbor seal population at the former naval air station is managed by the Marine Mammal Center
Environmental & Waste
ENVIRONMENTAL / WASTE MANAGEMENT
Solid Waste: StopWaste (Alameda County Waste Management Authority) – stopwaste.org | (510) 891-6500; each city has collection services; mandatory recycling and composting
Recycling: California has the nation’s most comprehensive recycling and composting requirements; Alameda County is a leader; Household Hazardous Waste programs; e-waste recycling
Environmental: California DTSC; CalEPA; San Francisco Bay Regional Water Quality Control Board; East Bay Municipal Utility District (EBMUD – water supply and wastewater); Port of Oakland air quality; former military contamination (Alameda Naval Air Station – PFAS and legacy contamination); Chevron Richmond (adjacent Contra Costa); Bay shoreline and wetland restoration
Notes: Alameda County is a leader in environmental sustainability; mandatory composting is nearly universal; zero waste programs are advanced; the Port of Oakland is a major source of diesel particulate matter affecting West Oakland communities (one of California’s most significant environmental justice issues); the former Alameda Naval Air Station has extensive PFAS and other legacy military contamination under Navy cleanup; San Francisco Bay restoration (wetlands, fish passage) is an active EBRPD and Save the Bay priority; sea level rise planning is sophisticated given the county’s significant Bay frontage
About Alameda County
Alameda County is California’s seventh most populous county and the twentieth most populous in the United States, home to Oakland, Berkeley, Fremont, Hayward, Livermore, Dublin, Pleasanton, San Leandro, and six other incorporated cities across 821 square miles of the East Bay. The county stretches from the urban Oakland and Berkeley waterfront through the flatland communities of Fremont, Newark, and Union City to the Tri-Valley tech corridor centered on Dublin and Pleasanton and to the Livermore Valley wine country to the east. County government is structured around a five-member Board of Supervisors, with independently elected offices including the Assessor, Auditor-Controller/Clerk-Recorder, Treasurer-Tax Collector, Sheriff, and District Attorney. The Assessor’s office is currently led by Phong La, the county’s 23rd Assessor.
All Services
Browse every category and topic available for this county.
Alameda County property taxes operate under California’s Proposition 13, which limits assessed value increases to 2 percent per year unless a property changes ownership or undergoes new construction. The East Bay has seen strong appreciation in recent years, particularly in the Oakland and Berkeley hills, the Tri-Valley communities of Dublin and Pleasanton, and in inner East Bay neighborhoods that have attracted buyers priced out of San Francisco and Silicon Valley.
The formal appeal window in Alameda County runs July 2 through September 15 – the same shorter window as Santa Clara County. Applications must be filed with the Clerk of the Board at 1221 Oak Street, 5th Floor, Oakland, 94612, by the deadline. Filing in person or by mail is accepted; keep proof of mailing. Before filing formally, contact the Assessor’s Office at 510-272-3787 to request an informal review – the Assessor may adjust the value without a formal hearing, resolving the matter faster.
For supplemental assessments – following a property purchase or new construction – the appeal window is 60 days from the mailing of the supplemental notice. Paying taxes on time during any pending appeal is required to avoid penalties – a reduction, if granted, is refunded after the fact.
OWNWELL CTA: Are you overpaying Alameda County property tax? The appeal window closes September 15. Ownwell analyzes your assessment and handles the appeal. You only pay if you save.
LINK CLUSTER: How to appeal your Alameda County assessment, Proposition 13 explained, Prop 8 decline-in-value claim, Supplemental assessment appeal, Homeowner’s exemption, Disabled veterans exemption, Proposition 19 senior transfer, Pay Alameda County property taxes, Search your assessed value
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Public Records
California’s Public Records Act gives residents access to government records held by Alameda County agencies. The Auditor-Controller/Clerk-Recorder maintains all recorded property documents – deeds, mortgages, liens, and official records – and vital records including birth, death, and marriage certificates. Records are accessible online and at the main office. The Superior Court maintains civil, criminal, family, and probate court records through its eCourt Public Portal for civil and probate matters, and the Odyssey Portal for criminal records. Arrest records are maintained by the Alameda County Sheriff for county jurisdictions and by city police departments within incorporated cities.
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Search Alameda County public records, including arrests, court filings, property history, and background information for Oakland, Berkeley, and East Bay residents.
Search Alameda County arrest and court records. TruthFinder aggregates publicly available arrest records, court filings, and background information for residents across Oakland, Berkeley, Fremont, Hayward, and all East Bay communities.
Courts & Legal
Courts & Legal
The Alameda County Superior Court operates ten courthouse locations across the county to serve its geographically spread population. The Rene C. Davidson Courthouse in Oakland at 1225 Fallon St is the main facility for civil and criminal matters. Probate matters are primarily handled at the Berkeley Courthouse at 2120 Martin Luther King Jr Way, Berkeley, and at the Hayward Hall of Justice at 24405 Amador St. Residents should confirm the correct courthouse for their matter before filing.
Courts Directory
Court
Type
Phone
Address
Rene C. Davidson Courthouse
Civil, criminal — Oakland
510-891-6000
1225 Fallon St, Oakland
Wiley W. Manuel Courthouse
Criminal, civil — Oakland
510-891-6000
661 Washington St, Oakland
Hayward Hall of Justice
Criminal, civil, family, probate
510-690-2700
24405 Amador St, Hayward
Fremont Hall of Justice
Criminal, civil, family
510-818-7100
39439 Paseo Padre Pkwy, Fremont
East County Hall of Justice
Criminal, traffic — Tri-Valley
925-227-6700
5151 Gleason Dr, Dublin
Berkeley Courthouse
Probate (primary), traffic
510-647-4439
2120 Martin Luther King Jr Way, Berkeley
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Senior Services
Senior services in Alameda County are coordinated through the Alameda County Agency on Aging, which serves residents 60 and older with home-delivered meals, congregate dining, caregiver support, transportation, in-home care coordination, the Long-Term Care Ombudsman program, and HICAP Medicare counseling. The Agency on Aging main line is 510-577-3500.
Alameda County’s diverse senior population includes significant African American, Latino, Asian American, and immigrant communities, each with culturally specific senior service programs operating through community-based organizations that partner with the Agency on Aging. Oakland has historically had one of the largest concentrations of African American senior homeowners in the Bay Area, many of whom have accumulated significant Proposition 13 protection that is particularly valuable in a high-appreciation market.
Proposition 19 is especially consequential for Alameda County senior homeowners. Homeowners 55 or older can now transfer their Prop 13 base-year value to a replacement home anywhere in California, up to three times in their lifetime. For a Berkeley or Oakland hills homeowner with decades of 2 percent cap protection and a market value far above their assessed value, this portability is worth tens of thousands of dollars annually.
California’s Medi-Cal program funds long-term care for eligible seniors through managed care organizations operating in Alameda County. In-Home Supportive Services (IHSS) allows many seniors to remain in their homes with funded care assistance. Applications go through the Alameda County Social Services Agency.
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Marriage & Vital Records
Marriage licenses, divorce records, and birth & death certificates are handled by the following office(s):
CLERK-RECORDER (Deeds, Marriage Licenses, Vital Records)
1106 Madison St., Oakland, CA 94607
(510) 272-6362
Genealogy
County-level record sources
Alameda County Superior Court, Probate Division (marriage licenses, will and estate case files – see Probate section above)
Local societies
California Genealogical Society and Library, 2201 Broadway Street, Suite LL 2, Oakland, CA 94612-3031, (510) 663-1358, [email protected] – headquartered in Alameda County.
Livermore-Amador Genealogical Society – covers eastern Alameda County.
Berkeley Historical Society and Hayward Area Historical Society – local city-level history resources within the county.
Probate & Estate
Losing someone and having to deal with courts and paperwork at the same time is hard. This section won’t make that easier, but it should tell you what to expect, what it costs, and where to go – so at least you’re not walking in blind.
Where to go
Alameda County Superior Court – Probate documents are filed only at the Berkeley Courthouse (not any other Alameda County courthouse).
Berkeley Courthouse 2120 Martin Luther King, Jr. Way, Berkeley, CA 94704 (510) 647-4439 Hours: Monday–Friday, 10:00 a.m.–2:00 p.m. (probate filing window)
Probate matters for Department 103 are also heard at the Oakland–Wiley W. Manuel Courthouse, 661 Washington Street, Oakland, CA 94607, (510) 627-4700.
Step 1: figure out which path applies
California recently increased its small-estate thresholds substantially, so check this first – more estates now qualify to skip full probate than in past years.
Small Estate Affidavit (personal property) – for estates with personal property valued at $208,850 or less (for deaths on or after April 1, 2025; holds through March 31, 2028). No court filing needed – present the signed affidavit directly to the bank or institution holding the property. Must wait at least 40 days after the death, and no probate proceeding can already be pending.
Petition to Determine Succession to Real Property, Primary Residence – for a decedent’s primary California residence valued at $750,000 or less (Judicial Council Form DE-310). Requires a 40-day wait, notice to heirs, and a probate referee appraisal.
Affidavit for Real Property of Small Value – for other (non-primary-residence) California real property valued at $69,625 or less (Form DE-305). Requires a 6-month wait.
Formal Probate – required when the estate exceeds these thresholds. California typically uses the Independent Administration of Estates Act (IAEA), letting the personal representative handle most matters without a court hearing for each step.
California is a community property state – a surviving spouse already owns their half of community property, and can often use a simplified Spousal Property Petition (Form DE-221) instead.
If using the small estate affidavit (personal property)
Wait at least 40 days after the death.
Confirm total qualifying California personal property (excluding trust assets, joint tenancy, POD/TOD accounts, and beneficiary-designated accounts) is $208,850 or less, using date-of-death values.
Complete the affidavit under Probate Code § 13100.
Present it with a certified death certificate directly to the bank or institution – no court filing required. Collecting property this way makes you personally liable for the decedent’s unsecured debts up to the value received (Prob. Code § 13109).
IF USING THE PRIMARY RESIDENCE PETITION OR SMALL REAL PROPERTY AFFIDAVIT
Confirm the property qualifies and the applicable waiting period has passed (40 days for the primary-residence petition; 6 months for the small real property affidavit).
File the petition (Form DE-310) or affidavit (Form DE-305) with the Alameda County Superior Court, filed at the Berkeley Courthouse.
A probate referee appraises the property; heirs receive notice.
Once approved, the property transfers without full probate administration.
If formal probate is required
Deliver the original will (if any) to the court clerk within 30 days of learning of the death (Prob. Code § 8200).
File a Petition for Probate (Form DE-111) to admit the will and request appointment as personal representative.
The court issues Letters Testamentary (Form DE-150) or Letters of Administration.
If Independent Administration authority is granted, the personal representative can act on most matters without separate court hearings.
Notice to creditors and an inventory/appraisal (with a probate referee) follow, along with payment of debts and taxes.
The estate closes with a final petition for distribution.
What it costs
Small estate affidavit / real property affidavits: no court filing fee for the personal-property affidavit; filing fees apply to the DE-310 primary-residence petition and DE-305 small real property affidavit.
Formal probate filing fee: several hundred dollars, varying somewhat by county.
Personal representative and attorney compensation: statutory fee schedule based on estate size (Prob. Code §§ 10800–10810) – a percentage that declines as the estate grows.
No California state estate tax or inheritance tax.
Probate filings, estate administration, and guardianship matters are handled by the following office(s):
Public Safety & Arrests
Arrest records, inmate search, and law enforcement services are handled by the following office(s):
SHERIFF
1401 Lakeside Dr., Oakland, CA 94612
(510) 272-6878
Elections & Voting
Voter registration, polling locations, and elections information are handled by the following office(s):
Registrar of Voters
1225 Fallon St., Room 102, Oakland, CA 94612
(510) 272-6933
CA Voter Registration
Health & Human Services
Offices & Contacts
Health services, social services, and assistance programs are handled by the following office(s):
Health Dept
(510) 267-8000
Social Services
(888) 999-4772
Medi-Cal
(800) 300-1506
Public Health Information
PUBLIC HEALTH
Office: Alameda County Public Health Department – (510) 267-8000 | acphd.org
Services: Comprehensive county health department; STI/HIV (Oakland has significant prevalence); immunizations; WIC; behavioral health; environmental health; restaurant inspections; jail health; epidemiology
Hospitals: Highland Hospital (Alameda County – public safety-net hospital; Level II trauma); Children’s Hospital Oakland (UCSF Benioff); Alta Bates Summit (Sutter); Kaiser Permanente multiple; UCSF at various sites; Stanford Health Care (Fremont/Pleasanton area)
Notes: Highland Hospital is the county’s safety-net hospital with a world-class trauma center; UCSF and Kaiser both have significant East Bay presence; Oakland has significant health disparities driven by poverty and historical redlining; the county’s diverse population (Asian, Black, Latino, white) creates multilingual health service demands
Editorial independence: CountyOffices maintains strict editorial independence from our affiliate partners. Our content is researched from official government sources. Affiliate relationships do not influence our recommendations or the information we publish.
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