Contra Costa County

US States / A-G / California / Contra Costa County

Contra Costa County is named for the Spanish words for “opposite coast” since the county was across San Francisco Bay from San Francisco.


Surrounding County Courthouses: 

N – Napa CountySolano County and Sacramento County

E – San Joaquin County

S – Alameda County

W – Marin County


Created:  February 18, 1850                                          Location in the state of California

County Seat: 

Martinez  1850 – present


County Courthouse – Martinez  


Location:  725 Court Street / Main Street

Built:  1932 – 1933

Style:  Neo-Classical Revival

Architect:  Edward Geoffrey Bangs of Berkeley

Contractor:  R R Arnold ( supervisor )


Description:  The building faces west and is a three story buff colored stone structure. The building is square and covers the entire block. The west front has wide brick steps leading up to a large portico with six Doric columns resting on 18 foot octagonal bases. There are three sets of bronze double doors. The roof line is flat. The architect was and the contractor was local contractors which were mostly from the county. The supervisor during construction was R R Arnold, who was the County Engineer. In 1966, the building was remodeled to house the courts which were moved from the old courthouse to the north.


Note:  The building was originally constructed as the Hall of Records and contained 8,000 square feet of floor space. The Board of Supervisors notified all contractors that they were expected to employ local labor.


See:  National Register of Historic Places – Contra Costa County Hall of Records (  Courthouse ).


Old County Courthouse – Martinez  




Location:  625 Court Street / Main Street

Built:  1901 – 1902

Style:  Classical Revival

Architect:  William H Toepke and Charles I Havens

Contractor:  Unknown


Description:  The building faces west and is a two story granite and concrete structure. The building and the jail on the east side, occupy the entire block. The building is constructed of Vermont granite. The west front has wide granite steps leading up to a large portico with four Ionic columns rising to a wide pediment with frieze at the roof line. A balustrade runs along the flat roof line.  In 1966, the building became the County Finance Building when the courts moved to the Hall of Records to the south.


Note: The jail is located on the east side of the courthouse. The jail which was built in 1901 is also constructed with Vermont granite . The architect was William S Mosser & Son.


See:  National Register of Historic Places – Contra Costa County Courthouse Block..


 A F Bray Courthouse – Martinez  




Location:  1020 Ward Street / Pine Street

Built:  1986 – 1987

Style:  Modern

Architect:  The NBBJ Group of Seattle, Washington

Contractor:  S J Amoroso Construction Company, Inc. of Los Angeles


Description:  The building faces north and is a three story concrete structure. The north front has a wide portico with six concrete pillars rising to a concrete header and pediment. Behind, a projecting section rises to a peak. Above the flat roof line. On the east and west sides of the front, there are one story wings with large windows.


See:  The county is located in the 1st Appellate District of the Court of Appeal – San Francisco.



County Courthouse – Martinez










Old County Courthouse – Martinez
















Photos taken 2013