If you’ve been in the manufactured housing space for more than five minutes, someone has told you: watch the infrastructure.

It sounds generic. It sounds like standard due diligence advice. And then you close on a park, the ground thaws in March, a water main under pad 22 gives out at 11 PM on a Friday, and you spend $31,000 by Sunday afternoon.

Now you understand.

Here’s the reality of what you’re actually buying when you acquire a 1970s or 1980s manufactured housing community — and the systems serious operators use to manage the risk before it manages them.

The Scale of the Problem

The Manufactured Housing Institute’s 2025 data tells a sobering story: more than 60% of known manufactured home communities in the U.S. were built during the 1970s and 1980s. Another 18% were built before 1970.

Do the math. If the average park built in 1978 laid its main water lines and sewer laterals that year, those systems are pushing 50 years old. Cast iron water mains have a design life of 50–70 years. PVC sewer laterals installed in that era often run 30–50 years before cracking, root intrusion, or joint failure becomes chronic.

This isn’t fearmongering. It’s physics.

The parks coming to market today — especially the ma-and-pa parks you can still buy at reasonable multiples in secondary markets — are disproportionately in this age range. You can get a great deal on a 120-lot park in rural Tennessee or North Carolina. You might also be inheriting a water system that’s been held together with prayer and duct tape for a decade.

The Double Hit: Park-Paid Utilities

The infrastructure problem compounds with a billing structure problem. Parks built 40–50 years ago typically used park-owned utilities — the landlord contracted with the municipality, paid the master water/sewer bill, and either included utilities in lot rent or charged a flat recovery fee.

That made sense in 1978 when water was cheap and communities were smaller. It makes no sense today.

When you’re paying the water bill, residents have zero incentive to conserve. Dripping faucets, running toilets, hose left on for days — it all flows through your master meter and lands on your P&L. We’ve seen operators discover they were paying $80–$100/lot per month for water while charging residents $40/lot in utility recovery. That’s a $40+/lot per month subsidy — on a 100-lot park, that’s $4,000/month you’re voluntarily giving away.

Layer in line breaks, pressure loss events, and EPA/state DEQ compliance requirements for private water systems, and you have a business where operational risk is concentrated directly under your feet.

The Four Infrastructure Failure Modes

In our experience acquiring and operating communities, infrastructure problems tend to cluster around four failure modes:

1. The Catastrophic Main Break

This is the dramatic one. A main line under a roadway fails. You lose water to half the park. You’re in an emergency repair situation, scrambling for a plumber who knows mobile home parks, often paying 1.5–2x normal rates because it’s an emergency.

2. The Slow Bleed

More common and more insidious: dozens of small leaks in old fittings, corroded gate valves, or loose connections throughout the distribution system. Your meter bill keeps climbing 3–5% per quarter. Nobody sounds the alarm because nothing dramatic happened.

3. The Compliance Event

EPA and state DEQ requirements for private water systems are real and enforced. Annual testing, pressure standards, cross-connection prevention — if you own the utility, you own the compliance obligation. Many acquired parks have compliance histories that weren’t fully disclosed.

4. The Sewer Backup

Particularly in parks with older clay or cast iron sewer laterals. Root intrusion, joint failure, or ground settlement cause blockages. In the worst cases, sewage surfaces on pads or in low-lying areas — a health hazard, a tenant relations disaster, and potentially a regulatory emergency.

What Proactive Operators Do Differently

The operators who sleep soundly — even in older parks — do several things most small operators skip:

Due Diligence That Actually Digs

Before close, pull the DEQ/EPA compliance history for any park with a private utility. Pull water billing records for 24 months. Have a licensed utility contractor (not a general plumber) do a visual inspection with a pressure test and, if warranted, camera-snake the main sewer lines. This is $2,000–$4,000 in additional due diligence that can surface a $40,000 problem — or give you the data to negotiate a $40,000 seller credit.

This kind of structured infrastructure review is one of the core checklists in our Mobile Home Park Due Diligence Playbook, which walks through the 30+ operational and physical factors that matter most before you close on a community.

Infrastructure Mapping

Create a physical and digital map of every utility line in the park: water mains, sewer mains, cleanouts, shutoff valves, meter locations. Astonishingly, many acquired parks have no documentation of their own utility layout. When something breaks at midnight, you don’t want to be digging by flashlight trying to find the main shutoff.

Submetering Conversion

For any park where you’re carrying utility costs, build a conversion plan. Individual submeters (or RUBS — Ratio Utility Billing System) shift water cost responsibility to tenants, incentivize conservation, and eliminate your subsidy exposure. It costs $800–$2,500 per lot to install smart submeters. On a 100-lot park at $40/lot net recovery improvement, payback is roughly 20–30 months — then it drops straight to NOI forever.

Vendor Relationships Before You Need Them

Have a list. Know which plumber in each market covers mobile home parks specifically — not general residential. Know who does emergency utility work. Have a direct number, not just Google. When you need them at 11 PM on a Friday, you’ll have them.

The Takeaway

Infrastructure isn’t glamorous. It doesn’t show up in pro formas the way revenue does. But it’s the thing that, when it fails, makes you question every deal you’ve ever done.

The best mobile home park operators we know treat their utility systems like they treat their tenants: with regular attention, proactive maintenance, and a clear plan before problems become emergencies.

Buy the park. Map the infrastructure. Know what’s underground. The operators who do this consistently outperform the ones who cross their fingers and hope the pipes hold.

At Keel Team, infrastructure due diligence is a non-negotiable part of every acquisition. It’s cost us a few deals. It’s saved us from a dozen disasters.

Want to learn more about manufactured housing community investing? Browse our resources on due diligence, acquisitions, and park operations.