What Is a Site Density Ratio and Why It Matters for RV Park Investors

October 8, 2026 · RV park investing, explained

Public domain, via Wikimedia Commons

Site density ratio doesn't come up in most real estate classes, and it isn't a line item on a standard appraisal. That makes it easy to misunderstand or skip entirely. Investors coming from apartments or self storage are used to metrics like units per acre or rentable square feet, and they try to force RV parks into that same framework. The problem is that RV parks run on land, utilities, and guest experience all at once, so a density number that looks great on paper can hide real operating problems on the ground.

"More sites per acre always means more revenue"

This is the most common assumption, and it has a kernel of truth. All else equal, a park with 20 sites per acre collects more rent than one with 8 sites per acre on the same parcel. But all else is rarely equal. Packing sites tighter usually means smaller rigs, shorter stays, and less room for the amenities that drive higher nightly rates and repeat bookings. A dense park built for value-conscious monthly tenants can still perform well, but it's a different business model than a spacious resort-style park charging premium nightly rates. Comparing the two on density alone misses the point. The real question is whether the density matches the rate strategy and target guest.

"Site density ratio is basically the same as occupancy rate"

These get confused because both show up as percentages or ratios in a pro forma, but they measure different things. Occupancy rate tells you how many of the existing sites are filled on a given night or month. Site density ratio tells you how many sites exist relative to the land, independent of whether anyone is staying in them. A park can have low density (plenty of room between sites) and still run high occupancy. A park can have high density and run low occupancy because the experience feels cramped or the infrastructure can't support demand. Treating the two as interchangeable leads investors to misdiagnose problems. Low revenue from a dense park might be an occupancy problem, a rate problem, or a density problem, and each has a different fix.

"Higher density parks are always lower-end or lower-quality"

There's a real pattern behind this belief. A lot of older, budget-oriented parks were built dense because land was cheap and the goal was maximizing site count. But density by itself doesn't determine quality. Some well-run, higher-density parks use smart site layout, sound barriers, staggered hookup placement, and strong landscaping to make tight spacing feel private and intentional. Meanwhile, some low-density parks are low density because of bad planning, not because of a deliberate resort strategy. Wasted common area, oversized roads, and poor site placement can eat up acreage without adding any guest value. Density is a design input, not a quality score on its own.

What actually matters instead

For underwriting purposes, site density ratio is useful mainly as a diagnostic tool, not a standalone return metric. A few things matter more than the raw number:

• Usable acreage, not gross acreage. Wetlands, setbacks, floodplain, and road frontage can remove a meaningful chunk of a parcel from development. Two properties listed at the same acreage can have very different buildable land, which changes what density is actually achievable.
• Infrastructure capacity per site. Septic systems, well capacity, and electrical service often set a hard ceiling on density that has nothing to do with available land. A park that looks like it has room to add 20 more sites might be capped at 5 by its septic permit. This is one of the most common surprises in RV park due diligence, and it's worth a direct call to the local health department or a septic engineer before assuming expansion is possible.
• Revenue per acre, not just sites per acre. A park with fewer, larger sites charging premium rates for big rigs can out earn a denser park full of smaller, lower-rate sites. Run the math on dollars per acre, not just site count per acre, when comparing two properties.
• Guest experience at the proposed density. Walk the comparable parks in the market, if you can, and note how spacing affects noise, privacy, and perceived value. This is qualitative, but it shows up directly in reviews and repeat bookings.
• Room to adjust. Markets shift between monthly tenants and nightly travelers over time. A site layout with some flexibility to reconfigure or add amenities tends to hold up better than one built at maximum density with no slack.

Site density ratio is a useful lens for understanding how a park's land is being used, but it's a starting question, not an answer. The properties that perform well are the ones where density, infrastructure, and rate strategy all point in the same direction. At Invest With Zac, this kind of underwriting detail is exactly what we walk through with investors before any capital moves, because the number on the brochure rarely tells the whole story.