California Code of Regulations, Title 25, Section 42 requires any residential apartment complex with 16 or more units to have a resident manager who actually lives on the property. This is not a recommendation or a best practice. It is a state law. Buildings with 15 or fewer units are legally exempt, though many smaller owners still choose to have someone onsite. If your building crosses the 16-unit threshold and you do not have a qualified resident manager in place, you are out of compliance.

For owners managing 16-plus-unit properties in Orange County, the Inland Empire, or anywhere else in California, this regulation creates a real operational challenge. Finding the right person, structuring their compensation correctly, understanding their legal status as an employee, and figuring out what to do when they leave are all pieces of a puzzle that many landlords underestimate until they are scrambling to solve it.

At TrueDoor, we have managed properties in this size range for close to 20 years. We have handled the transition when an onsite manager retires, when one quits with no notice, and when a previously self-managed building needs a compliant system put in place fast. This article covers everything you need to know about the California resident manager requirement and how professional management changes the picture.

The California Law: What Title 25 Section 42 Actually Requires

California Code of Regulations, Title 25, Section 42 is the state regulation that governs the resident manager requirement. The rule is straightforward in its core structure: any apartment house or dwelling consisting of 16 or more units must have a resident manager. The manager must actually reside at the property in a designated unit. An off-site property manager, a regional supervisor, or a management company alone does not satisfy the requirement. Someone with manager responsibilities must physically live there.

The requirement applies statewide, which means it covers Orange County apartment owners, Inland Empire portfolio holders, and every other California jurisdiction. However, some cities have added their own requirements on top of the state baseline. The City of Los Angeles, for example, has historically had stricter local ordinances around when a resident manager is required and what qualifications they must have. If your building is located in a municipality with a local rent control or housing ordinance, check with your local housing department or legal counsel, because local rules may be more restrictive than the state baseline.

Properties with 15 or fewer units are legally exempt from the state resident manager requirement. That does not mean having onsite coverage is a bad idea for smaller buildings, it simply means the state is not compelling you to do it. For buildings in the 10-to-15-unit range, the decision to have someone onsite is usually driven by the owner’s proximity to the property, the tenant profile, and the complexity of day-to-day operations rather than legal compulsion.

There is one practical nuance worth noting about exactly how units are counted. The owner’s unit, if the owner lives on the property, can sometimes count toward the unit total. Certain exemptions may apply if the owner lives at a complex that would otherwise require a manager. Whenever your building is near the 16-unit line, confirm the specific count with a California property law attorney before assuming you are exempt.

Building Size vs. Requirements: What Changes at Each Threshold

California does not have a one-size-fits-all property management framework. The state’s requirements shift meaningfully as your unit count grows, and so do the practical demands on whoever is managing the property. The table below breaks down the three main tiers and what TrueDoor provides at each level.

The jump from 15 to 16 units is operationally significant in a way that owners sometimes do not fully appreciate until they are already past it. Adding one unit to a 15-unit property through an ADU conversion, a garage conversion, or a new construction addition can suddenly trigger a legal obligation to have a person living on the premises in a manager capacity. That has implications for your budget, your floor plan (is there a unit you can designate for the manager?), and your employment obligations.

For most owners in the 16-to-49-unit range, the right structure is a professional property management company providing the systems, compliance knowledge, and oversight, with an onsite manager handling the daily human presence that the state requires. The two roles are complementary. The PM company should be directing the onsite manager, not the other way around.

What an Onsite Resident Manager Actually Does Day to Day

A resident manager is not the same thing as a property management company. The distinction matters. The PM company handles the business layer: accounting, legal compliance, lease enforcement, vendor contracts, and strategic decision-making. The resident manager handles the physical presence layer: the person-to-person work that happens every day at the property.

Here is a breakdown of typical resident manager responsibilities. The exact scope will depend on the size of the property, what the owner or PM company delegates, and what the employment agreement specifies.

Resident managers are not expected to perform skilled trade work like plumbing repairs, electrical work, or HVAC servicing. Those jobs go to licensed contractors. What the resident manager provides is continuity of presence and first-response coordination. Think of them as the eyes and ears on the ground who communicate upward to the PM company and outward to tenants.

Compensation Structures for Resident Managers

California law allows several approaches to compensating a resident manager, but all of them must comply with the state’s minimum wage requirements. The most common approach is a rent reduction, where the manager lives in a unit at reduced or no cost in exchange for their management duties. However, the amount of the rent reduction cannot push the effective hourly compensation below the applicable California minimum wage based on the hours actually worked.

This is a compliance point many owners get wrong. If you offer a resident manager free rent worth $1,800 per month and they are working 30 or more hours per week, the effective hourly rate may fall below California’s current minimum wage. In that case, you are legally required to supplement the rent reduction with a cash wage to bring total compensation into compliance.

Whatever compensation structure you choose, document it clearly in a written employment agreement that specifies duties, hours, compensation, and the process for reviewing or terminating the arrangement. A handshake deal with your onsite manager creates ambiguity that becomes very costly if the relationship ends badly.

The Employment Law Angle Most Owners Miss

This is where a lot of California apartment owners get into trouble. The resident manager is not a contractor. They are not a vendor. Under California law, your resident manager is your employee, and that carries a set of obligations that many owners never see coming.

Beyond payroll mechanics, California’s employment laws around termination apply to your resident manager. If you need to remove an onsite manager who is not performing, you generally cannot simply demand they vacate the unit as a tenant at the same time you terminate their employment. The employment termination and the tenancy termination are separate legal matters, each with their own process and notice requirements.

This is one of the reasons many owners in the 16-to-49-unit range find professional property management so valuable. When TrueDoor manages a property with an onsite manager, we handle the employment compliance side, making sure workers’ comp is in place, compensation is structured correctly, and any termination scenario is handled with proper legal procedure rather than a landlord improvising under pressure.

What Happens When Your Onsite Manager Leaves

One of the most disruptive events for a 16-plus-unit property is when the resident manager decides to retire, quit, or move on. If you are the owner, you are suddenly facing a legal compliance gap because you are required to have someone in that role, and finding the right person fast while keeping daily operations intact is genuinely difficult.

Kyle Thompson, TrueDoor’s co-founder, describes a situation his team handled directly in Santa Ana: a roughly 50-unit property where the longtime onsite manager was retiring after years of service. The property had accumulated deferred maintenance and compliance issues over several years, and the owner had no succession plan in place. When the manager announced she was leaving, the owner had weeks to find a replacement, transfer institutional knowledge, and address the backlog of issues that had been allowed to pile up.

The lesson from that transition is that succession planning for your onsite manager is something you want to build into your management structure proactively, not reactively. Some things that make transitions smoother include having documented processes that a new manager can follow from day one, using a property management platform where all tenant data, lease information, and maintenance histories live in a centralized system rather than in the outgoing manager’s head, and having a PM company in place that can absorb the operational load during the gap period rather than having everything grind to a halt.

A 5-Step Plan for Onsite Manager Succession

• 1
  Document Current Processes

  Every procedure your current manager follows should be written down. Key contacts, vendor relationships, maintenance workflows, and house rules should all live in a manual that transfers with the role.

• 2
  Centralize Tenant Data

  Lease terms, security deposit amounts, move-in conditions, maintenance request histories, and tenant contact information must be in a system accessible to the PM company, not only to the individual manager.

• 3
  Start Recruiting Before You Need To

  If your current manager is showing signs of wanting to move on or is approaching retirement age, begin your search before they give notice. Six to eight weeks of lead time is ideal.

• 4
  Overlap if Possible

  If budget and unit availability allow, bring the new manager in for a two-to-four-week overlap period so the outgoing manager can train them directly. This preserves institutional knowledge and reduces the risk of operational gaps.

• 5
  Have Your PM Company Own the Transition

  A professional PM company should be the institutional anchor during any manager transition. They hold the contracts, the technology platform, and the compliance knowledge. Individual managers come and go; the PM company’s infrastructure should be constant.

Does an ADU Push My Building Over 16 Units?

This question comes up frequently in California, especially as ADU (accessory dwelling unit) construction has accelerated under state law. If you own a 14-or-15-unit building and you add one or two ADUs, do those new units count toward the 16-unit threshold that triggers the resident manager requirement?

The short answer is: yes, in most cases, newly constructed ADUs count as dwelling units for purposes of California Code of Regulations, Title 25, Section 42. Adding an ADU to a 15-unit building to create a 16-unit total can create the resident manager requirement. This is not always factored into ADU feasibility analyses, and it is a meaningful operational and cost consideration for smaller landlords who are adding units to build equity.

There are also scenarios where owners near the threshold may consider whether certain spaces qualify as “units” under the law. Guest units, manager units already occupied by the owner, and certain accessory spaces may or may not count depending on how they are legally permitted and used. These are fact-specific determinations. Do not assume your count is clear without confirming it with someone who knows California housing regulations.

How TrueDoor Works With Onsite Managers

TrueDoor manages properties across Orange County and the Inland Empire, including a range of 16-plus-unit communities where a resident manager is required. Our role in those relationships is to serve as the management infrastructure that the onsite manager operates within, not to compete with the manager’s role or diminish it.

When we take on a property that requires an onsite manager, here is what that typically looks like in practice.

• 1
  Property and Compliance Assessment

  We start with a thorough walkthrough of the property, a review of existing leases, and an audit of current practices. If there are deferred maintenance issues or compliance gaps, we identify them before we take on liability for the property.

• 2
  Onsite Manager Evaluation or Placement

  If a manager is already in place, we evaluate their performance, confirm their employment is structured correctly, and clarify their role going forward. If a placement is needed, we recruit, screen, and hire the right person quickly. We know what the role requires and what kind of person succeeds in it.

• 3
  Training and Systems Setup

  We train the onsite manager on our processes, our technology platform, and their specific responsibilities at the property. Everything is documented. Nothing is held only in someone’s memory.

• 4
  Ongoing Direction and Oversight

  Once the manager is in place, TrueDoor provides ongoing direction. The manager handles daily physical-presence responsibilities; we handle accounting, leasing strategy, vendor oversight, legal compliance, and owner reporting.

• 5
  Employment Compliance Management

  We make sure the manager’s compensation is structured to comply with California minimum wage law, that workers’ compensation is in place, and that the employment relationship is documented properly.

Why TrueDoor Has This Capability When Many PM Companies Do Not

Not every property management company has experience running properties in the 16-to-49-unit and 50-plus-unit ranges. The skill set required to manage a large apartment community is genuinely different from managing a single-family portfolio. TrueDoor has built the infrastructure, the hiring processes, and the compliance knowledge to handle both sides of that equation. That is why we regularly take on onsite-manager-required properties that other local PM companies decline.

Frequently Asked Questions