Every utility bill issued to a manufactured housing resident in California must comply with specific requirements under the Mobilehome Residency Law (MRL) and the Public Utilities Code. These are not guidelines or best practices — they are statutory obligations codified in the California Civil Code and the Public Utilities Code. Violations are enforceable through private litigation, and Cal. Civ. Code § 798.86 provides for attorney fees to the prevailing party, creating a financial incentive for residents to pursue enforcement.
The following 14 rules represent the core compliance requirements for utility billing in California manufactured housing communities. Thirteen are direct statutory mandates under the MRL and the Public Utilities Code. The fourteenth is an audit best practice that strengthens defensibility. For a broader view of how these rules fit into the full regulatory framework, see our complete compliance guide.
1. Meter Readings Must Be Shown
Cal. Civ. Code § 798.40(a) requires that the charges for the billing period be separately stated along with the opening and closing readings for the resident's meter.
Why it matters: Meter readings allow residents to independently verify that the billed consumption matches the actual metered usage. Without readings on the bill, residents have no way to confirm the accuracy of the charges — and neither does the operator in the event of a dispute.
Compliant: The bill shows the prior meter reading, the current meter reading, and the calculated consumption for each utility type. For example: “Electric — Prior: 4,512 kWh | Current: 4,999 kWh | Usage: 487 kWh.”
Non-compliant: The bill shows only a dollar amount (e.g., “Electric: $62.47”) without the underlying meter readings. Also non-compliant: showing consumption without the opening and closing reads (e.g., “487 kWh used” without showing where the number came from).
2. CARE Discount Must Be Passed Through at 100%
Cal. Civ. Code § 798.43.1(c) requires that the California Alternate Rates for Energy (CARE) discount be passed through to eligible residents at the full discount rate — 100%, with no portion retained by management.
Why it matters: CARE provides a discount on electric and gas service for qualifying low-income households. In master-metered communities, the utility applies the CARE discount to the master meter account. The operator is required to pass that discount through to each enrolled resident. For a detailed breakdown, see our CARE and FERA passthrough guide.
Compliant: The enrolled resident's bill shows the full pre-discount charge, a separate CARE discount line item reflecting the utility's published discount rate, and the net charge after the discount.
Non-compliant: CARE-enrolled residents receive no discount on their bill, receive a reduced discount (less than the utility's published rate), or the discount is applied but not shown as a separate line item.
3. FERA Discount Must Be Passed Through at 100%
Cal. Pub. Util. Code § 739.12(b) establishes the Family Electric Rate Assistance (FERA) discount as a line-item discount on electric bills — and it must reach eligible submetered residents in full, the same passthrough obligation that applies to CARE.
Why it matters: FERA provides a discount on electric bills for households of three or more persons with income between 200% and 250% of the federal poverty guidelines. Unlike CARE, FERA applies only to electric service — there is no gas FERA discount. The passthrough obligation is identical to CARE: 100%, with no portion retained.
Compliant: The enrolled resident's electric bill shows the FERA discount as a separate line item at the utility's published FERA discount rate.
Non-compliant: FERA-enrolled residents receive no discount, the wrong discount percentage is applied, or FERA is confused with CARE and the wrong rate is used (FERA and CARE discount percentages differ).
4. Charges Cannot Exceed Direct Utility Rates
Cal. Pub. Util. Code § 739.5(a) requires master-meter customers to charge each user no more than they would pay for the same service directly from the utility — and for water and sewer, Cal. Civ. Code § 798.40(c) limits charges to amounts derived from the property's actual purveyor bill. This is the “no-markup rule” — the most litigated utility billing requirement in California manufactured housing.
Why it matters: These provisions mean operators cannot profit from utility billing. The rate applied to each resident's consumption must match or be less than the applicable rate from the utility's published tariff schedule. Any amount charged above the published rate — including billing surcharges or service charges added by the operator beyond what the statutes permit — is a violation.
Compliant: The operator applies the current published tariff rate for the applicable schedule (e.g., SCE Schedule D, SoCalGas Schedule GR) to each resident's metered consumption. When the utility publishes new rates, the operator updates billing rates to match on or before the effective date.
Non-compliant: The operator adds any fee on top of the utility's published rate. The operator continues billing at a previous rate after the utility has published a lower rate. The operator uses a flat rate per space instead of the metered tariff rate.
Consequences: Because Cal. Civ. Code § 798.86 provides for attorney fee recovery, rate parity violations create disproportionate litigation risk. Even a small per-resident overcharge, multiplied across a property and accumulated over months, can justify the cost of litigation for plaintiff's counsel. For a deeper analysis, see the rate parity section of the complete compliance guide.
5. Utility Charges Must Be Separately Itemized
Cal. Civ. Code § 798.41(a) requires that utility charges be separately stated from rent. Each utility type must be itemized individually.
Why it matters: Separate itemization serves two purposes. First, it allows residents to understand what they are paying for each utility and verify that the rates are correct. Second, it establishes that utility charges are distinct from rent — which matters for rent stabilization ordinances and for the operator's own accounting.
Compliant: The bill shows separate line items for each utility type (electric, gas, water, sewer), each with its own rate, consumption, and total. Rent appears as a separate charge.
Non-compliant: Utility charges are bundled into a single “Utilities” line, utilities are included in the rent amount, or different utility types are combined (e.g., “Electric & Gas: $87.20”).
6. Billing Agent Must Be Disclosed
Cal. Civ. Code § 798.40(b) requires that if a third-party billing agent generates utility bills on behalf of management, that relationship must be disclosed to residents.
When this applies: Any time management engages an outside company to calculate utility charges, generate bills, or handle utility billing operations, that company is a “billing agent” under this section. This includes full-service billing providers, software platforms that generate bills, and outsourced billing operations.
Compliant: Each bill includes a clear disclosure such as: “Utility billing services provided by [Company Name] on behalf of [Property Management].” The disclosure is on the bill itself — not buried in a lease addendum or community rules document.
Non-compliant: A third party generates and sends bills with no disclosure of the agency relationship. The billing agent presents itself as the billing authority rather than identifying itself as acting on behalf of management.
7. Common Area Metering Must Be Disclosed
Cal. Civ. Code § 798.43 requires that if common area utilities are metered separately or allocated across resident bills, the metering arrangement must be disclosed.
Why it matters: Common areas — clubhouses, pools, laundry facilities, landscape lighting, community offices — consume utilities. How that consumption is metered and billed affects residents. If common area usage flows through the master meter and is effectively distributed across resident bills, that must be transparent.
Compliant: The operator provides a disclosure (on the bill or in an accompanying notice) identifying how common area utility consumption is metered, whether any common area costs are allocated to resident bills, and if so, the method of allocation.
Non-compliant: Common area consumption is silently allocated across resident bills — residents pay for common area usage without knowing it. Or common areas are separately metered but the arrangement is not disclosed, leaving residents unable to confirm that their bills do not include common area costs.
8. Submetered Rates Must Match Direct-Service Rates, Tier by Tier
Cal. Pub. Util. Code § 739.5(a) requires a master-meter customer to charge each user “at the same rate that would be applicable if the user were receiving gas or electricity directly” from the serving utility. Where Rule 4 bars charging more in total, this rule goes further: the per-unit rate on every usage tier must match the published direct-service tariff rate for the same schedule and billing period.
Why it matters: Tiered rate schedules make it possible to overcharge on one tier while undercharging on another — a bill can look approximately right in total while individual tiers are priced from a stale or wrong schedule. Rate parity is checked tier by tier, not just at the bottom line.
Compliant: Every billed tier matches the utility's current published direct-service rate for the applicable schedule and period, verified against a certified reference copy of the tariff.
Non-compliant: An applied rate above the direct-service rate on any tier — even if the bill's total appears comparable to a direct-service bill.
9. CARE and FERA Residents Must Get Their Income-Graded Fixed-Charge Tier
Under CPUC Decision 24-05-028 (implementing AB 205), the large electric utilities now bill a fixed monthly Base Services Charge that is income-graded: CARE-enrolled households owe the lowest tier and FERA-enrolled households a reduced tier.
Why it matters: Because Cal. Pub. Util. Code § 739.5(a) requires each submetered resident to be billed as if served directly, and Cal. Civ. Code § 798.43.1 requires the full discount to reach the resident, an enrolled resident billed the standard fixed charge — or billed from a schedule with no tier for their enrollment — is overcharged every month, before a single kilowatt-hour is consumed.
Compliant: The enrolled resident's electric bill shows the fixed charge at their program's tier from the current certified schedule.
Non-compliant: A CARE- or FERA-enrolled resident is billed the standard fixed charge, or the billing schedule has no income-graded tier to apply.
10. Divided Master-Bill Charges Can Never Exceed the Master Bill
Where a master utility bill is divided among spaces rather than submetered, the total billed to residents can never exceed the amount on the property's own utility bill (Cal. Pub. Util. Code § 739.5(a); Cal. Civ. Code § 798.40(c)), any administrative fee on water or sewer is capped by § 798.40(c)(3), and common-area usage must be accounted for — not silently divided across resident bills.
Why it matters: For water and sewer, § 798.40(c)(1) authorizes only usage-based methods keyed to actual submeter readings — occupancy, square-footage, and fixed-ratio (RUBS-style) allocation have no statutory safe harbor. Divided billing is where the largest systematic overcharges occur, because an allocation formula that drifts even slightly repeats its error on every space, every month.
Compliant: Every allocated line traces to a confirmed master bill and a recorded allocation formula that reproduces exactly, cent for cent — and the sum across all residents never exceeds the master bill.
Non-compliant: Resident charges that sum to more than the master bill, water or sewer allocated by a proxy method unmoored from submeter readings, or common-area consumption silently spread across resident bills.
11. Submetered Water Must Be Billed From the Property's Actual Water Bill
Since AB 1061 (Cal. Civ. Code § 798.40(c), operative January 1, 2022) — extended to every water purveyor, including municipal and district providers, by AB 604 (operative January 1, 2024) — management “shall only bill” submetered water service using the statute's bill-derived methods. The property's actual water bill is the only lawful basis; pricing water or sewer from a posted tariff schedule is prohibited.
Why it matters: This is the single biggest change to California manufactured housing utility billing in the last decade, and billing practices that were lawful before 2022 — pricing submetered water from the purveyor's posted rate schedule — are violations today. Many operators and billing providers have not caught up.
Compliant: Each resident's water and sewer charges derive proportionally from the purveyor's bill for the same period, exclude common-area usage, and keep the administrative fee within the § 798.40(c)(3) cap — the lesser of $4.75 (the statutory base amount, subject to CPI adjustment) or 25% of the resident's usage charge. Across the community, the sum of all residents' charges never exceeds the purveyor's bill itself.
Non-compliant: Submetered water priced from a posted tariff schedule, charges that include common-area usage, or an administrative fee above the statutory cap.
12. Converting a Bundled Utility to Separate Billing Requires a Rent Reduction
Cal. Civ. Code § 798.41(a) permits management to begin billing a utility separately only if, at the initial separate billing, rent is simultaneously reduced by the average amount management paid for that utility for that space over the preceding twelve months. § 798.41(b) bars separate billing entirely under a rental agreement entered before January 1, 1991 that has not since been extended or renewed.
Why it matters: Separately billing a previously-bundled utility with no corresponding rent reduction is a disguised rent increase — the resident pays the same rent plus a new charge for a service they were already paying for.
Compliant: The new separate utility line appears in the same period as a documented rent reduction equal to the trailing twelve-month average cost for that utility and space.
Non-compliant: A new separate utility charge with no simultaneous rent reduction, or separate billing imposed under a pre-1991 unrenewed rental agreement.
13. Flat Pass-Through Charges Must Trace to a Documented Amount
Some services, such as trash or refuse collection, have no published tariff to verify against — haulers charge franchise rates, not CPUC-filed schedules. Cal. Civ. Code § 798.41(a) still limits separate billing to the fees and charges actually assessed by the utility, § 798.41(d) requires the charge to be separately stated on each billing, and § 798.31 bars charging for anything other than services actually rendered (Greening v. Johnson (1997) 53 Cal.App.4th 1223).
Why it matters: A flat line with no tariff behind it is exactly where an unexamined charge can drift above the underlying cost — there is no published schedule for a resident, or an auditor, to check it against unless the operator documents the basis.
Compliant: The flat line traces to a documented monthly amount, the billed amount never exceeds it, and a mid-period move-in or move-out only ever prorates the charge downward.
Non-compliant: A flat charge above the documented amount the operator actually pays, an undocumented flat charge, or an upward proration.
14. Rate Schedule Must Be Referenced
Unlike the preceding thirteen rules, this is not a direct statutory mandate. It is an audit best practice that materially strengthens the defensibility of every bill.
What it means: Every bill should reference the specific rate schedule used to calculate each charge — by name, version, and effective date. For example: “Rate schedule: SCE Schedule D, effective January 1, 2026.” This creates a verifiable link between the charge on the bill and the published tariff it was calculated from.
Why it matters: In a billing dispute, the operator must demonstrate that the rate used was the correct published rate in effect during the billing period. A rate schedule reference on the bill is the first link in that chain of evidence. Without it, the operator must reconstruct which rate was in effect, which version was used, and whether it was applied correctly — a significantly harder task months or years after the fact.
Best practice: Include the rate schedule name, effective date, and source utility on every bill. Maintain archived copies of every rate schedule used, with the source tariff document retained for reference. This creates an audit trail that runs from the published tariff to the rate to the bill — the foundation of defensible billing. For a complete view of the compliance framework these rules support, see the compliance page.