Concord is the largest city in Contra Costa County, spread across the valley on the north side of Mount Diablo between Walnut Creek, Pleasant Hill and Clayton. When co-owners of a Concord house, condominium, mobile home or rental property can no longer agree, a partition action asks the Contra Costa County Superior Court to end the co-ownership, usually by ordering the property sold and dividing the money according to each owner’s share. Talkov Law’s partition attorneys handle these cases throughout Northern California.

For a free, 30-minute consultation, call (510) 999-3300 or use the form at the bottom of this page.

Map of Concord, California

The City of Concord is in central Contra Costa County, bordered by Pleasant Hill to the west, Walnut Creek to the south, Clayton to the southeast and Pittsburg to the northeast, with Martinez, the county seat, just to the northwest.

Why Concord Partition Cases Are Different

Moderate Prices for the Bay Area, but Real Money at Stake

Concord is one of the more affordable places to own a home in the Bay Area, but property here still represents most of a family’s wealth. The median home sale price in Concord was about $757,500 in August 2026, according to Redfin. At that price, a one-third share of a typical Concord house is worth about $250,000. How a dispute is handled still matters:

• Credits and reimbursements can tip the result. When one co-owner has paid the mortgage, property taxes, insurance or repairs for years, those payments can be credited back from the sale proceeds. With less equity in the property than in many Bay Area cities, these adjustments can make up a large part of what each owner walks away with.
• Legal costs need to stay in proportion. The costs of the partition are generally shared in proportion to each owner’s interest (California Code of Civil Procedure section 874.040), so an early, practical plan protects everyone’s share.
• Sale is the usual result. A typical Concord house cannot be physically divided in a fair way, so courts generally order a sale when that would be more equitable than dividing the land (Code of Civil Procedure section 872.820).

Mostly Owners, With a Large Rental Market

The California Department of Finance estimates Concord’s population at about 122,500 as of January 2026. According to the United States Census Bureau, about 62 percent of Concord homes are lived in by their owners and the rest are rented. Census figures reported by Contra Costa County show that roughly 64 percent of the city’s homes are single-unit houses or townhomes and about 17 percent are in buildings with 20 or more units. Concord also has an unusually large number of mobile homes, about 1,759, or 3.7 percent of the city’s housing, according to the city’s housing plan. Co-owned mobile homes raise their own questions, because the owners usually own the home but rent the space beneath it.

Tenancy in Common in Concord

In San Francisco, “tenancy in common” often means an apartment building shared by several unrelated households. That arrangement is not common in Concord. Here, tenancy in common usually comes up in two simpler ways:

• Co-buyers. Siblings, unmarried partners, and parents and adult children often buy a Concord home together. Unless the deed says otherwise, they usually hold title as tenants in common, and any one of them can ask the court to partition the property.
• Inherited homes. When a parent leaves a Concord house to several children, the children usually end up as tenants in common. If there is no written agreement among them about dividing the property, California’s Partition of Real Property Act generally applies (Code of Civil Procedure section 874.311). That law gives the other heirs a chance to buy out the co-owner who asked for a sale, at a value set by the court, before the property is sold (Code of Civil Procedure section 874.317).

Inherited Concord Homes and Property Taxes

Many Concord homes have stayed in the same family for decades and carry low property tax values as a result. Since Proposition 19 took effect in 2021, a child who inherits a parent’s home can keep the parent’s low tax value only if the home becomes the child’s principal residence within one year, and only up to the old taxable value plus $1 million. Anything above that is added to the tax value (California Revenue and Taxation Code section 63.2).

Because Concord prices are lower than in much of the Bay Area, many inherited Concord homes fall within that $1 million allowance. That makes a buyout more realistic here: a sibling who moves in may be able to keep the parents’ tax bill. The harder question is usually money, not taxes. The sibling who wants to stay must be able to refinance or otherwise pay the others their share, and the siblings who do not move in get no tax benefit from keeping the home.

Rental Properties and Concord’s Tenant Protection Rules

Concord has its own Residential Tenant Protection Program, which took effect in April 2024 and was amended in 2025. For apartment buildings built before February 1995, annual rent increases are now limited to 5 percent. “Just cause” eviction rules apply to landlords who rent out three or more single-family homes or condominiums in Concord, and every rental property must register with the city. If co-owners are fighting over an older Concord apartment building, these limits affect what a buyer will pay, and a sale ordered by the court does not end a tenant’s protections.

Lot Splits and Backyard Units

California’s Senate Bill 9 allows many single-family lots to be split into two parcels without a public hearing, as long as each new parcel is at least 1,200 square feet and neither is smaller than 40 percent of the original lot (California Government Code section 66411.7). Many Concord houses sit on mid-sized lots, so a co-owner may argue that the property can be divided rather than sold.

That argument often fails for co-owners in a dispute. The person applying must sign a statement that they intend to live in one of the homes for at least three years, and the split is not allowed if the home has been rented to a tenant in the last three years. With so many Concord houses rented out, that second rule alone rules out many properties. Backyard cottages, which the law calls accessory dwelling units, raise a related question: who paid to build one, and should that owner be credited for the added value when the property is sold?

Transportation and Development That Affect Concord Property Values

Location within Concord can make a real difference in value, which matters when an appraiser or the court-appointed referee is deciding what a property is worth:

• Two Bay Area Rapid Transit stations. Concord station, which opened in 1973, sits in downtown Concord a short walk from Todos Santos Plaza, the city’s central square ringed by restaurants and shops. North Concord/Martinez station serves the north side of the city. Homes within walking distance of either station appeal to commuters.
• Freeways. Interstate 680 runs along the city’s western edge, and State Route 242, a 3.4-mile connector, links Interstate 680 to State Route 4 through Concord. A long-discussed set of new ramps at State Route 242 and Clayton Road is listed by the Contra Costa Transportation Authority as an upcoming project, without a construction schedule.
• The former Concord Naval Weapons Station. The city plans to turn the inland part of the former base, around North Concord/Martinez station, into a new community. The current area plan calls for about 12,272 homes, a quarter of them affordable. In May 2026 the City Council approved purchase terms with the United States Navy and the master developer, Brookfield, but the Navy was still reviewing them, and the mayor has said final agreements are not expected before 2029. Construction has not started.
• Major employers. John Muir Health’s Concord Medical Center, the Mount Diablo Unified School District headquarters, and a campus of California State University, East Bay are all in Concord. Buchanan Field, a county-owned airport, is also in Concord, and homes under its flight paths can appraise differently.

Concord Neighborhoods We Often See in Partition Cases

• Todos Santos and downtown, one of Concord’s oldest areas, where older homes and small rental buildings near Bay Area Rapid Transit are often owned by families or investors.
• The Monument Boulevard corridor and Four Corners, where apartment complexes and duplexes may be covered by the city’s rent limits.
• Clayton Valley Highlands, Turtle Creek and the southeast neighborhoods, where long-time owners have passed single-family homes down to their children.
• North Concord, near North Concord/Martinez station and the former Naval Weapons Station.

Where a Concord Partition Case Is Heard

A partition action involving Concord property is filed in the Superior Court of California, County of Contra Costa. The court files and hears all civil cases at the Wakefield Taylor Courthouse, 725 Court Street, in Martinez, just northwest of Concord. Talkov Law’s San Francisco office at 50 California Street, Suite 1500, is near the Embarcadero station on the same Bay Area Rapid Transit line that serves Concord.

Many partition cases settle once the other co-owner understands that the court will order a sale if the parties cannot agree. Filing the case often moves a stalled situation forward, whether the outcome is a buyout, a cooperative sale, or a sale handled by a court-appointed referee.

Talk to a Concord Partition Attorney

If you co-own property in Concord and cannot agree with the other owners on whether to sell, buy out, or divide it, call Talkov Law at (510) 999-3300 for a free, 30-minute consultation, fill out the form below, or send us your information on our contact page.