Concord single family rental exemption claims start with a tenant who has read the ordinance and believes every rental in the city is covered. You know the property is exempt, but knowing it and proving it are two different things. When the tenant files a petition or the housing department sends a notice, the window to respond is short and the burden of proof is on you.
The document that anchors every exemption
Concord’s Residential Rent Review and Just Cause for Eviction Ordinance carves out single-family homes, condominiums, and accessory dwelling units from its rent-increase and eviction-control provisions. The exemption is written into the city code, but the city does not keep a registry of exempt properties. You prove yours by showing it meets the definition the ordinance uses.
The first document is the one most owners already have but do not think of as an exemption record: the Contra Costa County assessor’s parcel use code. A parcel classified as a single-family residential use — typically code 11 or a close variant — is prima facie evidence that the structure is a single-family home under the ordinance. You can pull the current use code from the county assessor’s online property search in under two minutes. Print the page, highlight the use code, and keep a dated copy in the property file.
This works because the ordinance ties its exemption to the actual use and structure of the building, not to the owner’s intent or the lease language. A parcel that the county classifies as a single-family residence is exactly what the ordinance describes. If the tenant argues the classification is wrong, the burden shifts back to them to show the property is something else — a duplex, a triplex, a mixed-use building — and that is a high bar when the county record says otherwise.
The second document: the occupancy record that stops the “four-unit” argument
Some tenants will point to the fact that a single-family home can have multiple occupants — roommates, a family with adult children, a garage converted to an unpermitted unit — and claim the property is actually a multi-unit building. The ordinance exemption for single-family homes holds regardless of occupancy, but you want a document that makes the point without a debate.
The rental agreement itself, if it describes the premises as a single-family dwelling and lists all occupants as tenants under one lease, is strong evidence. But the cleaner document is a Certificate of Occupancy or its equivalent from the City of Concord’s Building Division. Not every single-family home has a formal certificate on file, especially older ones, but the city can often produce a building permit history or a zoning verification letter that confirms the legal use is a single-family residence. Request it once, scan it, and it becomes a permanent part of the property record.
This matters because enforcement actions move faster than most owners expect. A tenant who files a petition alleging an unlawful rent increase or a violation of just-cause eviction rules can trigger a hearing notice that arrives with a deadline measured in days. Having the occupancy record ready means you respond with a document instead of an argument, and that changes the tone of the proceeding immediately.
The third document: the exemption letter you write once
The two documents above prove the property type. The third document connects them to the ordinance and to the specific tenancy. It is a short letter — two or three paragraphs — that you draft once, update as needed, and deliver to the tenant at lease signing and again if a dispute arises.
The letter states plainly that the property is a single-family home within the meaning of Concord Municipal Code Section 19.40.020 (or the current section number — check the ordinance before you write), that it is exempt from the rent-review and just-cause eviction provisions, and that the attached assessor’s record and occupancy document support the exemption. It does not need to cite case law or make a legal argument. It needs to be clear, dated, and specific enough that a hearing officer can read it and see that the owner has met the burden of proof.
Deliver the letter with the lease. If the tenant later pushes back, you are not starting from scratch — you are referencing a document they already received. That changes the dynamic from “prove it” to “you already have the proof.”
What is left: the city-specific details that change
The three documents form a reliable framework, but the exact process for submitting them in response to a petition or an enforcement notice varies. Concord’s housing division may update its hearing procedures, change the form number for a zoning verification request, or adjust the timeline for responding to a tenant petition. A document that worked last year may need a different cover sheet this year.
The ordinance itself is also subject to amendment. The exemption for single-family homes has been stable, but the definitions section, the notice requirements, and the penalties for non-compliance can shift. An owner who relies on a three-year-old summary instead of the current municipal code is taking a risk that is easy to avoid.
How we walk you through it
When you work with CAO on a Concord single-family rental, the exemption documentation is built into the onboarding process. We pull the assessor’s parcel record, request the occupancy verification from the city if it is not already in the file, and draft the exemption letter using the current ordinance language. The documents live in the property’s digital file, and our property management system flags any renewal or update deadlines so nothing expires unnoticed.
If a tenant files a petition, the response package goes out with the three documents plus a cover memo that addresses the specific allegation. The goal is to make the exemption so clear on paper that the hearing officer can dismiss the petition without a full hearing. That outcome depends on having the documents ready before the notice arrives, and the process we run ensures they are never more than a day away.
For owners who want to understand how the document workflow fits into a larger automation strategy, our workflow automation practice maps the entire tenant-lifecycle — from lease signing through move-out — so that compliance tasks like this one are triggered by events instead of memory.
If you are holding a Concord single-family rental and you do not have these three documents in one place, the time to produce them is now, not when the enforcement letter arrives. Contact us and we will walk you through exactly what your property needs.
Which of these three documents do you already have, and which one would be the hardest to pull together for your property?
About this article. This is general information and our own opinion, written from how we run operations for owners and businesses in Contra Costa County. It is not legal, tax, accounting, financial or other professional advice, it is not a recommendation to take or avoid any action, and it is not a substitute for advice about your own property, tenancy or business. CAO Investment Group is not a law firm, and reading this does not create an attorney-client or any other professional relationship. Local ordinances, fee schedules, forms, thresholds and deadlines change often and differ from city to city within Contra Costa County — anything here may be out of date by the time you read it, including as of the publication date shown above. Verify anything you plan to rely on against the current rules published by your own city or county, and speak to a qualified attorney, CPA or licensed professional about your specific situation before you act. We make no warranty that this information is current, complete or accurate, and we accept no liability for any action taken or not taken on the basis of it.
