Homerun
Tiny home kits and full house kits look superficially similar — both ship as pre-cut packages, both can be owner-built, both promise massive savings over conventional construction. But the legal status, financing, resale, and lifestyle implications are radically different. Here's how to choose.
The legal split is the biggest difference
A tiny home on a trailer chassis is legally a recreational vehicle (RV) or a "tiny house on wheels" (THOW). It's titled like a vehicle, parked under RV zoning rules, and excluded from most building codes. It can move between sites. It cannot be financed as real estate.
A tiny home on a foundation is legally a dwelling (an Accessory Dwelling Unit or a primary residence, depending on zoning). It's titled as real property with the land it sits on. It must meet local building codes and is permitted as a structure.
A full house kit on a slab is always a permanent dwelling — a single-family home that just happens to have been pre-engineered. There's no ambiguity.
Size and price comparison
- Tiny home kit on a trailer (8×24): 192 sq ft. Kit $9,500–$16,000. Finished by owner: $32,000–$58,000.
- Tiny home kit on a foundation (12×24): 288 sq ft. Kit $13,000–$22,000. Finished by owner: $55,000–$88,000.
- Small house kit (24×32): 768 sq ft. Kit $19,000–$32,000. Finished turnkey: $115,000–$185,000.
- Mid house kit (28×40): 1,120 sq ft. Kit $27,000–$44,000. Finished turnkey: $165,000–$245,000.
The per-square-foot finished cost on a tiny is usually higher than a full house kit — small spaces concentrate the expensive components (kitchen, bath, mechanicals) into a tighter footprint.
Financing
This is where tiny homes lose hard.
Tiny home on wheels: RV loans through manufacturers and a few specialty lenders. Rates 9–14% in 2026, 10–15 year terms, often require 10–20% down. No mortgage interest deduction. No appreciation.
Tiny home on foundation: Hard to finance — most banks won't write a mortgage under $100,000 because they don't make enough on the loan to justify the paperwork. Cash, HELOC against another property, or owner financing are the usual paths.
Full house kit: Standard construction-to-permanent mortgage. Rates 6.75–8% in 2026, 30-year terms, 5–20% down depending on loan type. Mortgage interest deductible. Builds equity.
Resale and appreciation
A tiny home on wheels depreciates like an RV — typically 10–15% in the first year, 30–40% over 5 years. A tiny home on a foundation in a desirable location can hold value or appreciate slowly, but the resale market is thin (most buyers want at least 800 sq ft). A full house kit on a slab appreciates with the land it sits on — same as any traditional home.
Where tiny homes win
- You want mobility. If the value of being able to relocate matters more than appreciation, a THOW is the only kit that delivers it.
- You're building an off-grid hunting/recreation cabin. Tiny footprint, less septic and well to install, fits zoning loopholes for "recreational structures."
- You want a backyard guest house or short-stay rental in a jurisdiction that allows tiny-on-trailer in residential zones.
- You're testing a downsize. Cheaper way to commit to small-space living before pulling the trigger on a $300K downsize home.
Where full house kits win
- You're building a primary residence. Financing, appreciation, and code compliance all favor a real house.
- You want family-size living. Anything over a couple-with-no-kids realistically needs 800+ sq ft.
- You want to build equity. A kit-built home on owned land is one of the cheapest ways to enter the real estate market with appreciating equity.
- Your jurisdiction is restrictive on THOWs. Most suburban areas don't allow them in residential zones — but everyone allows a permitted single-family home on a foundation.
The middle path: small house kit on foundation
If you want tiny-home simplicity but real-house benefits, look at small house kits in the 400–800 sq ft range on a permanent slab. You get a fully financeable, code-compliant home that appraises as real property; you get a low-maintenance footprint and a low utility bill; and you can often permit it as an ADU on a property you already own.