For years, Ratio Utility Billing Systems — RUBS — felt like a clever solution. Instead of spending capital on individual submeters, you simply divided your master utility bill among tenants based on square footage, occupancy, or some other formula. It was cheap to implement, easy to explain, and kept overhead low.

That era is ending. Fast.

In October 2025, a property management company in California paid a $495,000 settlement for using RUBS to disguise rent increases. In April 2026, the Ohio Supreme Court declared submetering companies in manufactured housing communities to be public utilities subject to state rate oversight. Minnesota banned RUBS for electricity entirely back in January 2025. Arizona’s Attorney General has already issued consumer protection alerts about RUBS overbilling.

If you’re still running RUBS across your mobile home parks in 2026, you may already be in violation — and not know it.

Why RUBS Is Collapsing

RUBS became popular in manufactured housing for a simple reason: most legacy parks were built without individual meters. Running new utility lines and installing meters is a capital-intensive project. RUBS was the workaround.

The problem is that RUBS is fundamentally untransparent. A tenant can’t verify they’re being billed accurately. They can’t reduce their bill by conserving water. And when the master bill spikes — due to a leak, seasonal demand, or a neighboring tenant’s broken pipe — every resident absorbs the cost whether they caused it or not.

State legislatures have noticed. The regulatory trend is unmistakable:

• Washington State (effective May 2025): Specific utility billing requirements tied to new rent control framework
• Minnesota (January 2025): RUBS banned for electricity; strict rules on water/gas markups
• California (ongoing): Multiple legal challenges and settlements; Los Angeles considering ban in rent-controlled areas
• Ohio (April 2026): Supreme Court ruling dramatically alters the submetering landscape
• New Jersey, Florida, Michigan: New manufactured housing legislation packages that touch utility billing practices

The patchwork is accelerating. If you operate in multiple states — and most mid-sized operators do — you’re managing a moving target that changes faster than most operators can track.

The Hidden Cost Nobody Talks About: Water Loss

Here’s what makes this even more urgent: aging infrastructure means many mobile home park operators are subsidizing significant water waste without knowing it.

In older parks with master-metered water, leaks in the distribution system, running toilets in occupied homes, and failed shutoff valves all show up as one number on the master bill — and the operator pays it all. Industry data suggests some parks lose 20–40% of their total water consumption to undetected leaks.

At current water rates, that’s potentially thousands of dollars per month silently draining out of your net operating income.

Individual submeters fix this in two ways: First, you can identify leak-related anomalies quickly by looking at per-lot consumption data. Second, tenants who see their own usage become more conservation-minded — reducing total park consumption 20–40% in studies comparing before and after submeter installation.

The Submeter Transition: Less Painful Than You Think

The traditional objection to submetering is cost and disruption. And for parks built in the 1960s and 70s, that concern was legitimate.

But the hardware has improved dramatically. Modern non-invasive “clamp-on” meters can often be installed without digging, without disrupting service, and without requiring access inside tenant homes. The installation cost per lot has dropped significantly over the past five years.

The return-on-investment math typically works out like this:

• Average water cost savings: $200–$500/month per park (depending on leak situation)
• Utility cost recovery from tenants: $1,500–$4,000/month depending on park size
• Reduction in tenant billing disputes: Significant time savings for on-site management
• Legal liability eliminated: Estimated $50,000–$500,000+ in avoided settlement risk

Most operators hit break-even on submeter installation within 18–24 months. After that, it’s pure net operating income improvement.

What to Do Right Now

1. Audit your current billing setup immediately.
For every park you own, document whether you’re on: (a) individual submeters, (b) RUBS, (c) flat lot rent inclusive of utilities, or (d) master-metered with no cost recovery. Know exactly where you stand before anything else.

2. Check your state’s current status.
RUBS legality varies by state and is changing rapidly. Have your attorney confirm that your current billing practice is still legal in each state where you operate. Do not assume what was legal two years ago is still permitted today.

3. Get a submeter feasibility assessment.
Contact a utility infrastructure specialist to evaluate your parks for submetering. Get a quote. Calculate the return on investment based on your current master bills. In most cases, you’ll find the math is more compelling than you expected.

4. Transition your highest-risk parks first.
If you’re in California, Ohio, Minnesota, or any other state with active RUBS enforcement, those parks move to the front of the line. Don’t wait for a demand letter to force your hand.

5. Switch to integrated billing software.
Stop running utility bills in spreadsheets. Platforms designed for manufactured housing communities can automate metered billing, combine charges with rent, handle payment tracking, and create a defensible audit trail if you’re ever challenged.

Utility infrastructure — meters, water lines, billing systems — is one of the most underexamined areas in mobile home park acquisitions. If you’re evaluating a park where RUBS is in use, it’s critical to understand the legal exposure you’d be inheriting and the capital cost of converting to submeters. Our Mobile Home Park Due Diligence Playbook covers utility infrastructure assessment as part of a complete pre-purchase review framework.

The Bottom Line

RUBS was a practical solution for a different era. In 2026, it’s increasingly a liability — legally, financially, and operationally. The combination of state-level legislation, activist tenant attorneys, and aging infrastructure makes continuing to ignore this issue an expensive bet.

The good news: the fix exists, the technology has gotten cheaper, and the operators who make the transition now are going to have a meaningful net operating income advantage over those who get dragged there by a lawsuit.

Don’t be the $495,000 cautionary tale.

Keel Team owns and operates 50+ manufactured housing communities across the Southeast and Midwest. This article is for educational purposes only and does not constitute legal advice. Consult a qualified attorney regarding the specific laws applicable in your state.