Treehouse and A-Frame Resort Feasibility Study

Independent feasibility studies for A-frame cabin resorts, treehouse resorts and mixed cabin villages in gateway and mountain markets, prepared for SBA 7(a), SBA 504, USDA B&I and conventional lenders. Part of our glamping and short-term rental feasibility study cluster.

From $4,900, fixed fee. 9 to 16 business days. Rush from 5 business days.

A-frames and treehouses are the highest-cost formats in outdoor hospitality after site-built cabins, and they are built in markets with thousands of cabin listings already competing on price. The feasibility question is therefore arithmetical: does the market's achievable ADR, net of distribution cost and seasonality, carry the installed cost per key at the lender's DSCR? In the Smokies, Blue Ridge, Broken Bow and the Hill Country, the answer in 2026 depends on unit count and phasing more than on concept. MMCG's engagement record includes a 20-unit A-frame highest and best use study in Broken Bow, Oklahoma and an SBA 504 study with five treehouse units in Thompsonville, Michigan.

No public source publishes an installed cost per key for either format, and published treehouse builder price ranges were not found; treehouses are priced by builder quote and are limited to sites with mature hardwood canopy. The documented evidence the study starts from:

On these inputs, fourteen 900 sq ft A-frames range from about $1.39 million to $4.73 million in hard cost before site work, slope work, pool, clubhouse, soft costs and contingency, a 3.4x spread that only executed bids close. The study conditions its determination on bids replacing estimates, and it carries the high case until they do.

The cabin markets where A-frame and treehouse resorts are proposed show contracting listings and softening ADR in 2026:

Seasonality is documented: Pigeon Forge peaks at 58.1 percent monthly occupancy with a $395 ADR in June and troughs near 36.7 percent; Gatlinburg's peak-to-trough monthly revenue ratio is 2.6x. The anchor generator is also moving: Great Smoky Mountains recorded 11,527,939 recreation visits in 2025, down from 14,161,548 in 2021, across a counting-method change in 2024 and a 43-day shutdown in 2025; Sevier County visitor spending was nonetheless a record $3.93 billion in 2024. Premium formats command premium rates where the product is distinctive: Onera in Fredericksburg, Texas, with treehouses, a dome and a safari tent, is reported at $600 to $1,000 a night, with midweek near $300. The study samples the named competitive set on dated peak, shoulder and off-season nights rather than relying on editorial ranges.

SBA 504. A detached two-bedroom A-frame is physically a dwelling, which argues against a special purpose classification; an operator-managed resort on one unsubdivided parcel with shared septic, a clubhouse and a pool cannot be sold off as individual homes without re-permitting, and CDC reproductions of the SOP example list include hotels, motels and other lodging facilities. The CDC decides property by property. The study models a new-business project at 20 percent equity (50/30/20) and presents the 15 percent case only against a written CDC finding. The September 10, 2026 25-year debenture priced at 5.41 percent, 6.54 percent effective; bank first liens were quoted at 7 to 9 percent; FY2027 504 fees are waived in rural areas. A-frames on foundations are 504 project assets under the 10-year fixed-location rule; the treehouse question turns on whether the structure is permanently affixed and assessed as real property.

SBA 7(a). Up to $5 million; the variable cap is 10.00 percent on loans over $350,000 at the 7.00 percent prime in force since September 17, 2026; FY2027 upfront fee on a $5 million loan at 75 percent guaranty is $138,125, with no upfront fee on loans of $700,000 or less in rural areas; maturity up to 25 years when at least 51 percent of proceeds fund real estate.

USDA B&I. Eligible as a tourist and recreation facility under 7 CFR 5001.105(b)(8) where the parcel is rural; FY2026 guarantee 85 percent under $5 million; a new business building a project and requesting the guarantee before completion needs 25 percent equity.

Cap rate evidence for value is campground trades and hotel sales: 9.3 percent average across 21 parks sold in 2024, approximately 7.75 percent on the Whistle Stop sale in December 2025, 8.2 percent on H1 2026 hotel sales at $137,000 per key; cabin-resort-specific cap rates were not found in the public record.

Slope. Sevier County, Tennessee applies a Critical Slope Overlay to all properties with an average slope of 30 percent or greater, and a rewrite of its critical slope and hillside overlay rules, with site plan stages, driveway and parking grade standards and a five-foot Firewise zone around building envelopes, went to the County Commission in August 2026. Treehouse and A-frame sites are, by their nature, sloped.

Septic. Tennessee sizes alternative systems at 150 gallons per bedroom per day, so 28 bedrooms imply 4,200 gallons a day before a clubhouse and pool, far above the 750 gallon threshold for a large system needing site-specific design; Sevier is a contract county running its own programme.

STR permit and taxes. Unincorporated Sevier County requires an annual fire-marshal STR permit since January 1, 2024, $250 for 12 occupants or fewer, with sprinklers for units over three stories, over 5,000 sq ft or sleeping 13 or more built after February 1, 2016. Tennessee's Short-Term Rental Unit Act grandfathers existing STR uses but gives a new build no protection against current zoning. The guest pass-through is 12.75 percent: 9.75 percent combined sales tax plus a 3 percent county lodging tax outside the cities.

Property tax. Sevier County assesses STRs at the 40 percent commercial ratio and cut its rate to $0.87 per $100 for FY2026-27 after reappraisal.

Each market has its own version of these four items; the study documents them for the parcel.

Programme detail: SBA 7(a) and 504 for glamping and cabin resorts and USDA B&I financing for glamping resorts and campgrounds. Adjacent formats: tiny home, park model and microcabin villages and short-term rental communities. Markets: Tennessee, Oklahoma, Georgia and Michigan state pages, and where we work. See also the hotel feasibility study and our engagement portfolio.

Prepared by Michal Mohelsky, J.D., FMVA, Practicing Affiliate of the Appraisal Institute. Studies are prepared under USPAP discipline, aligned with SBA SOP 50 10 8.1 and 7 CFR Part 5001, Appendix A to Subpart D. A senior analyst responds to proposal requests within 12 business hours from the firm's San Francisco office at 27 Maiden Lane, Suite 625.