259 Saint Thomas AveKey LargoFL33037



INVESTMENT ANALYSIS
Investment Verdict
Appreciation PlayInvestment property for sale in Key Largo at 259 Saint Thomas Ave, Key Largo, FL, 33037 projects strong ROI of 4.7%. Rental yield 2.89%. With 5% annual appreciation, the property builds $1,547,177 in value over five years. Equity growth combined delivers a projected five-year ROI of 38.66%, translating into $611,582 in total cumulative return on $1,582,000 invested capital. You can finance this property with Ziffy Mortgage’s DSCR loan, which leverages the property’s income for qualification rather than your personal income.
| This Property | City Avg | |
|---|---|---|
| Gross Rental Yield | 2.9% | 7.5% |
| Monthly Cash Flow | $(23,662) | $1,200 |
City averages based on Key Largo market data in our database. Property projections are estimates.
DSCR Loan Qualification
| Monthly Rental Income | $13,500 |
| Total Monthly Debt Service | $34,934 |
| DSCR Ratio | 0.39x |
Ziffy Mortgage typically prefers a DSCR of 1.0+, but in some cases you may qualify with a DSCR below 1. To explore if this deal qualifies for an investment mortgage, book time with your loan officer →
Estimates assume 6.0% rate / 30-yr fixed, 30% down, 1% tax, 0.5% insurance. Not a commitment to lend.
Single Family
Built in 2026
0.25 Acres lot
$N/A/sqft
No HOA
Neighborhood Data
Neighborhood data shown for ZIP Code: 33037, Key Largo, FL area.
Housing Distribution
Housing Statistics
| Category | Value |
|---|---|
| Total HU (Housing Units) | 10,705 (100%) |
| Owner Occupied HU | 4,666 (43.6%) |
| Renter Occupied HU | 1,622 (15.2%) |
| Vacant Housing Units | 4,417 (41.3%) |
| Median Home Value | $777,375 |
| Average Home Value | $1,018,328 |
Housing Distribution
Address Breakdown
Residential
8,579
Single Family
8,132
Multi-Family
447
Businesses
826



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Ziffy AI Summary
A quick, investor-focused snapshot highlighting income strength, yield potential.
| Key metrics | Value |
|---|---|
| Price | $399,900 |
| Est. Rent | $3,200/mo |
| ROI | 18% |
- Attractive rent-to-price ratio for income stability
- Good fit for DSCR financing with healthy coverage


Single Family
Built in 2026
0.25 Acres lot
$N/A/sqft
No HOA
Neighborhood Data
Neighborhood data shown for ZIP Code: 33037, Key Largo, FL area.
Housing Distribution
Housing Statistics
| Category | Value |
|---|---|
| Total HU (Housing Units) | 10,705 (100%) |
| Owner Occupied HU | 4,666 (43.6%) |
| Renter Occupied HU | 1,622 (15.2%) |
| Vacant Housing Units | 4,417 (41.3%) |
| Median Home Value | $777,375 |
| Average Home Value | $1,018,328 |
Housing Distribution
Address Breakdown
Residential
8,579
Single Family
8,132
Multi-Family
447
Businesses
826
Nearby investment properties with comparable rents
Nearby investment properties with comparable prices











