District 4 Supervisor Karen Mitchoff

Hello and welcome to the District IV website! As your County Supervisor, I was elected to serve the diverse communities of Clayton, Concord, Pleasant Hill, part of Walnut Creek, and the unincorporated Contra Costa Centre.

District IV is located in the beating heart of Contra Costa County. We have seen great transformation in our communities in a few short years, as innovation, prosperity, and new residents join us in the shadow of Mt. Diablo. Mindful of these developments, it is my core focus to build policies that best serve you, my constituents in District IV, and our neighbors across Contra Costa.

I am committed to better connecting the people of Contra Costa County with the vital services of government, and advocating for policies that will help our communities grow and prosper. 

I look forward to hearing from you.

Karen Mitchoff

 County and Community Updates

Contra Costa County Public Works to begin Construction of the Marsh Drive Bridge Replacement Project

Marsh Drive (Concord) Bridge Replacement Project Press ReleaseJune 2, 2021, Concord, CA – Contra Costa County Public Works will begin construction of the Marsh Drive Bridge Replacement Project starting on Monday, June 7, 2021 through January 2023, barring unforeseen circumstances. Work will occur between 7:00 am-4:00 pm, Monday-Friday, weather permitting. Work will take place on Marsh Drive, approximately 0.2 miles west of Solano Avenue, in both unincorporated Contra Costa County and the City of Concord. There will be restrictions to minimize impacts during commute hours. The speed limit through the work area will be 25 mph during construction. Drivers should expect delays. 

The project will include reconstruction of approximately 1,000 feet of Marsh Drive near the bridge, installation of a retaining wall, channel improvements, and relocation of various utilities including water, electric power, and communication facilities. Work includes replacing the existing bridge with a new concrete bridge in a slightly shifted alignment to the north in stages built to current standards. The new bridge will include a 10-foot-wide separated bike and pedestrian facility. 

Funding for this project is provided by Federal Highway Bridge Program Funds, Local Road Funds, Contra Costa County Flood Control District Zone 3B Funds, Pacific Gas & Electric Funds, Contra Costa Water District Funds, and East Bay Regional Park District Funds. 

Additional project information, including construction schedule, is available at www.contracosta.ca.gov/marshdrivebridge 

Marsh Drive (Concord) Bridge Replacement Project Press Release

About Contra Costa County Public Works Department:

Contra Costa County Public Works Department (CCCPWD) maintains over 660 miles of roads, 150 miles of streams, channels and other drainage and over 200 County buildings throughout Contra Costa County.   CCCPWD provides services such as Parks and Recreation, Sand Bag Distribution and Flood Control throughout unincorporated areas of Contra Costa County. To learn more about CCCPWD, please visit www.cccpublicworks.org 

Contact: Project Hotline: 800.684.2279; Media Inquiries: Kelly Kalfsbeek, 925.313.2115

Bay Area Election Officials Join Forces to Assure Public Trust in Elections                                 

Local election officials are your trusted source of non-partisan election information. 

The Registrars of Voters around the bay have created a greater Bay Area coalition to deliver accurate, current, and transparent election information to our nearly five million voters. Our goal is to highlight the security surrounding elections, including the audits we conduct to assure accurate and secure elections. 

We are seeking partnerships with journalists, reporters, and community groups to help us deliver accurate, non-partisan, and timely information regarding elections. 

Democracy is fragile and public trust in elections is essential to, and the hallmark of, a well-functioning system of government.                  

Ongoing disinformation campaigns misguide the public with unfounded claims regarding the certified systems we use to conduct accurate and transparent elections. These malicious efforts erode voters’ trust, faith, and confidence in elections and may dissuade voters from participating in future elections.                                        

Your local county election official is your trusted source of legitimate election information. If you hear questionable claims regarding an election, reach out to your local elections office, so we can clarify it for you. You can also refer to our website and follow our official accounts on social media. For more information, visit our website; BayAreaVotes (www.sccvote.org/bayareavotes) or our Facebook page; Bay Area Votes.                                         

2021/2022 Secured Property Taxes

Now Available at WWW.CCTAX.US

Look Up Tax Bill by either parcel number or property (situs) address. Please verify the address is correct.

Having difficulty keeping track of your property tax bills?  SIGN UP FOR E-BILLING!  

The benefits are:

  • It’s Clean! e-Billing prevents paper waste and allows you to save on postage.
  • It’s Safe! e-Billing notification is sent directly to the email address listed in your profile.
  • It’s Direct! e-Billing links you directly to your online property tax account.
  • It’s Helpful! With e-billing you get an email reminder to pay prior to each delinquent date.


The State Controller’s Office (SCO) administers the Property Tax Postponement (PTP) program, which allows eligible homeowners to postpone payment of current-year property taxes on their primary residence. PTP applications are accepted from October 1 to February 10 each year.

Go to the SCO website for more information, or call (800) 952-5661 or email postponement@sco.ca.gov.



Due to the consolidation of payment processing services, the coupon mailing address has changed.  2021-2022 tax bills will be printed with a new mailing address: P.O. Box 51104, Los Angeles, CA 90051-5402.

If you have any questions regarding your property tax bills or their payments, please contact the Treasurer-Tax Collector’s Office at (925) 608-9500 during the hours of 9 a.m. to 4 p.m., Monday through Friday, or by emailing us at taxinfo@tax.cccounty.us.  Information is also available on our website.