Utilities are one of the few operating costs an LA owner can meaningfully shift — and one of the most commonly overlooked. If you own a building where water, sewer, and trash are billed to the master meter and paid out of your pocket, you are absorbing a cost that rises every year regardless of how efficiently your tenants use it. RUBS and submetering are the two tools that move some or all of that cost back to the people generating it. Neither is a magic switch, and both have real compliance limits in Los Angeles.
This is the 2026 owner’s guide to recovering utility costs in an LA rental: what RUBS and submetering actually are, the money at stake, the rules that constrain them, and how to decide which — if either — fits your building.
The two approaches, plainly
Submetering means installing individual meters on each unit so residents are billed for their actual measured consumption. It is the fairest method and the strongest behavioral incentive — people who pay for exactly what they use tend to use less — but it requires a capital investment to install meters and a billing system to read and invoice them.
RUBS — Ratio Utility Billing System — allocates the building’s total utility bill among units using a formula rather than direct measurement. Common formulas divide the master bill by occupancy, square footage, number of bedrooms, or a blend. It requires no meters and little capital, which is why it is popular, but because it estimates rather than measures, it carries more disclosure and fairness obligations.
The money at stake
Water and sewer are the costs owners most often recover, because in LA they rise steadily and are usually master-metered in older multifamily buildings. On a building where the owner currently eats several thousand dollars a year in water and sewer, shifting even a meaningful share of that to residents changes net operating income directly — and because value on income property is a multiple of NOI, a recurring expense reduction is worth far more than its annual dollar figure when you eventually sell or refinance.
Why expense recovery is worth more than it looks. A $4,000 annual water expense you push to tenants is not just $4,000 a year. At a 5% cap rate, removing $4,000 of recurring expense adds roughly $80,000 to the building’s value. That leverage is the real argument for utility billing — not the monthly cash.
The rules that constrain you in LA
This is where owners get into trouble by treating utility billing as a purely financial decision. Several layers apply:
- Rent control and the RSO. For units under the Los Angeles Rent Stabilization Ordinance, you generally cannot simply start charging a sitting tenant for a utility that was previously included in rent without it being treated as a rent increase or a change in terms — which is tightly regulated. The clean moment to introduce utility billing is usually at a new tenancy, not mid-lease on a rent-controlled unit.
- State submetering law. California law (SB 7 and related rules) sets requirements for how newly submetered water is billed, disclosed, and what fees may and may not be charged. It applies to many buildings that install water submeters after a cutoff date.
- Lease terms and disclosure. Whatever method you use has to be clearly written into the lease: the method, the formula (for RUBS), what is included, and how the charge is calculated. Vague or retroactive billing is a fast route to disputes and liability.
- No hidden markups. You are recovering a cost, not running a profit center. Adding undisclosed margin to the utility itself invites legal exposure.
RUBS vs. submetering: how to choose
The decision usually comes down to building age, capital appetite, and turnover pace.
RUBS fits when installing meters is impractical or too expensive — common in older LA buildings with shared plumbing risers where true submetering would require opening walls. It lets you start recovering costs quickly with minimal capital, accepting that the allocation is an estimate.
Submetering fits when you can install meters at reasonable cost (often during a renovation or plumbing upgrade), you want the strongest conservation incentive, and you value the defensibility of billing actual measured use rather than a formula. It costs more upfront but is fairer and easier to justify to residents and regulators.
Introduce it at turnover. On rent-controlled units especially, the practical path is to add utility billing to the lease when a unit turns over and re-rents, so it is a term of the new tenancy rather than a change imposed on a sitting tenant. Rolling it through your building over several years of natural turnover avoids the thorniest compliance problems.
What to do before you flip the switch
- Pull your actual utility spend. Separate water, sewer, trash, gas, and electric, and identify which are master-metered and paid by you. You cannot size the opportunity without the baseline.
- Map your RSO exposure. Know which units are rent-controlled and which are not, because that determines when and how you can introduce billing.
- Get the lease language right. Have your method, formula, and disclosures drafted or reviewed before you bill a single tenant.
- Model both options. Compare the capital cost and recovery of submetering against the faster, lower-capital RUBS path over a realistic holding period.
Utility billing will not transform a building’s economics overnight, but it addresses a cost that otherwise only moves in one direction. Done inside the rules and introduced at the right moments, it is one of the few levers that both improves monthly cash flow and lifts the building’s underlying value — which is exactly the combination owners should be looking for.
Curious what utility recovery could add to your building?
We help LA owners evaluate RUBS and submetering against RSO limits, model the recovery, and roll it out compliantly at turnover. Free 30-minute owner consultation.
Book My Free Consultation →Disclaimer: This article is general information for California rental property owners and is not legal, tax, or financial advice. Utility billing is governed by the Los Angeles RSO, California submetering statutes, and lease-disclosure requirements that are specific and update periodically. Dollar and value figures are illustrative estimates. Confirm the current rules for your property and consult a qualified California real estate attorney before introducing RUBS or submetering.
