30 photos
Prospect analysis

350 11th St

Asking$1,100,000

Key Colony Beach · Key Colony Beach, FL · 2 bd · 3 ba · 1,288 sq ft · Built 1980

Underwritten as a short-term rental

Waterfront 2-bedroom half duplex in Key Colony Beach with 37.5 feet of dockage and strong short-term rental income projections.

This property offers direct boating access and is positioned in a high-demand Florida Keys market, with high-confidence underwriting metrics indicating robust cash flow potential. The investment thesis is supported by a combination of desirable amenities and favorable STR fundamentals, though the price point requires sustained rental performance.

Est. ADR
$685
Est. occupancy
62%
Gross rev / mo
$12,918
Cash-on-cash
22.8%

Airfolio market estimates · 20% down · detail in the underwriting panel.

Investment thesis

This well-maintained 2-bedroom, 3-bath half duplex is tailored for investors seeking a waterfront STR asset in the Florida Keys, with boating access and proximity to local amenities enhancing guest appeal. High-confidence underwriting projects strong monthly income and cash-on-cash returns, making it suitable for buyers prioritizing yield and lifestyle flexibility. The property’s dockage and garage add operational value for boating-focused guests. The primary caveat is the premium purchase price, which necessitates continued strong occupancy and ADR to meet return targets.

Highlights

  • 2 bedrooms, 3 bathrooms, 1,288 sqft half duplex
  • 37.5 feet of private dockage with quick ocean and gulf access
  • Attached garage for storage and gear
  • Wraparound balcony and easterly backyard exposure
  • Located in a sought-after waterfront community with amenities
  • High-confidence STR underwriting: $685 ADR, 62% occupancy, 22.8% cash-on-cash return (20% down, 6.4% interest)
  • Projected monthly cash flow of $4,184 after expenses

Risks

STR permitting: verify local ordinance and zoning allow short-term rental at this address before offering. Not verified.
STR regulations and licensing requirements should be verified for Key Colony Beach
Returns are sensitive to occupancy and ADR assumptions; market seasonality may impact performance
Premium price point requires sustained rental demand to justify investment
Older construction (1980) may entail higher maintenance or capital expenditures
Competition from similar waterfront STR inventory could pressure pricing

Market

Key Colony Beach, FL is a well-established, high-demand waterfront market in the Florida Keys, attracting both vacationers and boating enthusiasts. The STR strategy is supported by strong projected ADR and occupancy, with the region’s tourism-driven economy and limited waterfront inventory underpinning rental demand. However, the market’s premium pricing and regulatory environment require careful diligence.

Neighborhood

The property is situated in a desirable, amenity-rich waterfront community with strong guest appeal, particularly for those seeking boating, fishing, and outdoor recreation. The residential character and proximity to parks, restaurants, and leisure activities enhance its attractiveness for short-term renters. Conclusions about neighborhood-specific demand are high-confidence given the area’s established reputation, though ongoing competition and regulatory factors should be monitored.

Underwriting notes

At a $1,100,000 purchase price, underwriting projects a $685 ADR and 62% occupancy, resulting in an expected monthly income of $12,918 and cash flow of $4,184 after a 25% expense ratio and 20% down payment at 6.4% interest. The expected cash-on-cash return is 22.8%, driven by strong rental fundamentals and no management fee assumption. These figures are high-confidence but are sensitive to occupancy and ADR performance; investors should confirm assumptions and assess operational logistics for STR management.

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Figures are Airfolio market estimates modeled from listing, record, and market data, not investment advice · Analysis Aug 21, 2026.
Airfolio is a product of Trusty Labs, Inc. · CA DRE #01527508

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Airfolio is a product of Trusty Labs, Inc., a licensed California real estate brokerage · CA DRE #01527508. Concierge introductions to agents, lenders, and property managers are referrals, and Trusty Labs may receive referral fees. Revenue and return figures are Airfolio market estimates from public records, listing data, and market modeling, not offers, appraisals, or investment advice. Verify all figures independently.
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