Probate Court Wiki · California

Contra Costa County
Probate Court

Martinez, California Pop. 1.2MNo Estate Tax

Independent Research Notice: TheProbateCourt.com is an independent research and publication company. We are not affiliated with Contra Costa County Probate Court, the California court system, or any government agency. All information is for educational purposes only and does not constitute legal advice.

Overview

Contra Costa County is an East Bay probate jurisdiction serving a population of 1.2M with approximately 1,600 probate cases filed annually. The system processes roughly ~800 cases per judge or department. Contra Costa County's unique characteristics include a high proportion of Bay Area tech worker estates, significant oil refinery and industrial worker pension complexity, and high-value residential markets in Walnut Creek, Danville, and Alamo. The Superior Court – Probate Division handles estate administration, guardianship, conservatorship, and trust proceedings.

Key Distinguishing Feature

East Bay suburb; high proportion of Bay Area tech worker estates; significant oil refinery and industrial worker pension complexity; Walnut Creek and Danville high-value residential markets.

Quick Facts

Court Type

Superior Court – Probate Division

Judges / Departments

~2 active depts

Annual Filings

~1,600

Filings Per Judge

~800

Simple Timeline

9–12 mo

Complex Timeline

18–36+ mo

Fee Structure

Statutory (Cal. Prob. Code §10810)

Small Estate Threshold

$208,850

Tax Status

None

The Probate Process: Step by Step

File Petition for Probate (DE-111)

2–6 weeks from death

Executor or administrator files with court; original will + death certificate required.

Publish Notice (DE-121)

3–6 weeks (concurrent)

3 consecutive weeks in adjudicated newspaper; mail to all heirs 15 days before hearing.

Initial Hearing + Letters Issued

6–10 weeks after filing

Court appoints executor; issues Letters Testamentary (DE-150).

Inventory + Probate Referee Appraisal

1–3 months

All non-cash assets appraised by court-appointed Probate Referee at 0.1% of appraised value.

MANDATORY 4-Month Creditor Period (Cal. Prob. Code §9100)

4 months minimum — no exceptions

Cannot be shortened by any means. Statutory minimum. No exceptions.

Pay Debts, Taxes, Admin Expenses

2–4 months

Federal estate tax if >$13.99M (2025). No CA state estate tax. Income tax for year of death.

File Petition for Final Distribution + Accounting

1–3 months to prepare

Full financial accounting of every dollar in and out. Court filing fee $435 (Cal. Gov. Code §70650(c)).

Final Hearing + Order of Distribution

2–6 weeks post-hearing

Judge signs order. Asset transfers (deeds, accounts) complete in weeks following.

Timeline by Case Type

Case Type	Minimum	Typical	Extended
Simple uncontested estate	9–12 mo	9–12 mo	N/A if no complications
Estate with real property	9–12 mo	12–18 mo	18–30 mo if sale contested
Estate with business interests	9–14 mo	14–24 mo	24–48+ mo if valuation disputed
Contested / will contest	18–36+ mo	18–36+ mo	Up to 7+ years with appeals
Guardianship (ongoing)	3–6 mo to establish	Indefinite maintenance	Annual reports; court review

Cost Benchmarks

Fee Structure: Statutory (Cal. Prob. Code §10810). Costs are estimates for planning purposes only. Actual costs vary based on estate complexity, disputes, and professional rates. Consult a licensed attorney for specific guidance.

Estate Value	Attorney Fees	Executor Fees	Combined	Add'l Costs	Total Range	% of Estate
$500,000	$13,000 (statutory)	$13,000 (statutory)	$26,000	$3,000–$8,000	$29,000–$34,000	5.8%–6.8%
$1,000,000	$23,000 (statutory)	$23,000 (statutory)	$46,000	$4,000–$12,000	$50,000–$58,000	5.0%–5.8%
$2,000,000	$33,000 (statutory)	$33,000 (statutory)	$66,000	$5,000–$20,000	$71,000–$86,000	3.55%–4.3%
$5,000,000	$63,000 (statutory)	$63,000 (statutory)	$126,000	$8,000–$40,000	$134,000–$166,000	2.68%–3.32%

Attorney Intelligence: Real Case Patterns

The following case patterns are composite illustrations based on common probate scenarios in this jurisdiction. They are not accounts of specific individuals.

CASE PATTERN #1: THE PENSION COORDINATION PROBLEM

A Contra Costa County decedent was a retired Chevron refinery worker with both a company pension and a union pension. The estate required coordination between two separate pension administrators, the probate court, and the IRS. Total administration: 18 months.

Common Estate Planning Failures

Failure Mode	Frequency	Consequence
No revocable living trust	Most common	All assets titled in decedent's name go through full probate
Trust exists but never funded	Extremely common	Unfunded trust is legally valid, operationally useless — assets still probate
Will drafted 10–20 years ago; never updated	Very common	Outdated executors, guardians, beneficiaries; potential disputes
Real estate not titled to trust	Common	Property triggers full probate even if other assets are in trust
Beneficiary designations not updated after life events	Common	Ex-spouses, deceased beneficiaries, or wrong persons receive assets by contract
No coordination between legal, tax, financial advisors	Common	Contradictory asset structures; unintended taxable events; gap assets
DIY estate plan (online forms, unwitnessed)	Growing	Holographic will disputes; inadequate execution; court challenges
No successor trustee named or willing to serve	Moderate	Court petition required; delays and costs
Assets held in joint tenancy without tax planning	Common	Avoids probate but creates step-up basis issues, gift tax exposure, loss of control
Digital assets not addressed	Emerging	Cryptocurrency, online accounts, digital businesses inaccessible at death

How to Avoid Probate in California

1
Revocable Living Trust (most comprehensive — eliminates probate for all funded assets)
2
Small Estate Affidavit under Cal. Prob. Code §13100 (personal property under $208,850 as of April 1, 2025)
3
Spousal Property Petition under Cal. Prob. Code §13500 (surviving spouse summary procedure)
4
Beneficiary Designations on all financial accounts, IRAs, 401(k)s, life insurance
5
Transfer-on-Death (TOD) deeds for real property (California allows — avoids probate for residential property)
6
Joint Tenancy with Right of Survivorship (avoids probate but has tax planning risks — use carefully)

Key Statutes & Legal Authority

Statute / Code	Provision
Cal. Prob. Code §10810	Statutory attorney fees — 4%/3%/2%/1%/0.5% on gross estate value
Cal. Prob. Code §10800	Executor compensation — same schedule as §10810
Cal. Prob. Code §9100	Mandatory 4-month creditor claims period — no exceptions
Cal. Prob. Code §13100	Small estate affidavit — $208,850 threshold (eff. April 1, 2025)
Cal. Prob. Code §13500	Spousal property petition — surviving spouse summary procedure
Cal. Prob. Code §8120	3-week newspaper publication requirement
Cal. Prob. Code §17200	Trust petition jurisdiction
Cal. Prob. Code §10811	Extraordinary fees — court may authorize above statutory base
Cal. Gov. Code §70650	Court filing fees — $435 per petition

Frequently Asked Questions

Sources & References

California Judicial Council — Court Statistics Report 2023–2024
California Probate Code §10810 (statutory fee schedule)
California Probate Code §9100 (mandatory creditor period)
California Probate Code §13100 (small estate affidavit — $208,850 threshold eff. April 1, 2025)
California Government Code §70650 (court filing fees)
TheProbateCourt.com Probate Insider Reference Series 2026
EstatelawMagazine.com — Estate Law Reference 2026

Disclaimer: TheProbateCourt.com is an independent research and publication company. We are not affiliated with Contra Costa County Probate Court, the California court system, any government agency, or any probate court. All information provided is for general educational purposes only and does not constitute legal, tax, financial, or professional advice. Laws change frequently — always verify current statutes and consult a licensed attorney in your jurisdiction before making any legal decisions. © 2026 TheProbateCourt.com. All rights reserved.