110 Hampton Ln
Key Biscayne, FL 33149 · single_family · For Sale · 300 days on market
Asking price$6,900,000
6 beds 7 baths 3,550 sqft
Suggested offer$5,577,263$1,322,737 above the est. market value of $5,577,263.
View on Realtor.com →Listed by Jacqueline Molina · Fortune Christie's International Real Estate
Typesingle_family
Built2026
Price / sqft$1944
Est. value (own analysis)$5,577,263
Rent estimate (own analysis)$21,500/mo
HOANone
1 / 25
Show every detail
Statusfor_sale
Listed date2025-11-06
Removed date—
MLSMiamiMLS #A11909334
Coordinates25.69767, -80.16481
Address110 Hampton Ln
CityKey Biscayne
StateFL
Zip33149
Listing ID6111138131
Sourceus-real-estate-listings, cached 2026-08-31
ZIP market snapshot (33149)
Typical home value (ZHVI)$1,692,135
Typical rent (ZORI)$7,910/mo
Zillow Research's ZHVI (home value index) and ZORI (rent index) for this ZIP, as of 2026-07 — free published data, refreshed monthly, no RentCast quota spent. "Typical value/rent" is a smoothed index, not a literal median of active listings.
Underwriting (buy-and-hold, default assumptions)
| Acquisition (one-time, not monthly/yearly) | |
| Purchase price | $6,900,000 |
| Down payment (20.0%) | $1,380,000 |
| Loan amount | $5,520,000 |
| Closing costs (5.0%) | $345,000 |
| Total cash to close | $1,725,000 |
| Income | |
| Rent (comp-derived) | $21,500$258,000 |
| Vacancy loss (8.0%) | |
| Effective gross income | $19,780$237,360 |
| Operating expenses | |
| Property tax (placeholder 1.9% of price) | $10,925$131,100 |
| Insurance (placeholder 0.8% of price) | $4,600$55,200 |
| HOA dues | $0$0 |
| Management (0.0% of EGI) | $0$0 |
| Maintenance (5.0% of GSR) | $1,075$12,900 |
| Total operating expenses | $16,600$199,200 |
| Net operating income (NOI) | |
| Debt service & reserves | |
| Debt service (6.66%, avg 30yr rate as of 2026-08-27, 30yr amortizing) | |
| CapEx reserve (5.0% of GSR) | $1,075$12,900 |
| Mortgage insurance (PMI) (0.0% of loan, not required — down payment ≥ 20%) | $0$0 |
| Cash flow |
Cap rate
Cash-on-cash
DSCR
Rent-to-price (1% rule)
Gross rent multiplier
Operating expense ratio
Break-even occupancy
Comparables
Same ZIP. Real active rental listings, used to derive the rent estimate above.
| Address | Type | Beds | Baths | Sqft | Asking rent | Listed | Days on market |
|---|---|---|---|---|---|---|---|
| single_family | 6 | 5 | 3,356 | $21,400 | 2026-02-06 | — | |
| single_family | 6 | 6 | 4,007 | $27,000 | 2026-08-05 | — | |
| single_family | 6 | 9 | 4,757 | $21,500 | 2026-03-02 | — |
Same ZIP & bedroom count. Closed sales from Realtor.com over the last 12 months, matched to this property's type — real transaction prices, not asking prices. Falls back to Miami-Dade County public records (property appraiser tax roll) when Realtor.com has no sales on file for the area.
| Address | Type | Beds | Baths | Living sqft | Sale price | Sale date |
|---|---|---|---|---|---|---|
| 762 Fernwood Rd | single_family | 6 | 5 | 3,584 | $5,690,000 | 2026-06-15 |
| 285 Woodcrest Rd | single_family | 6 | 6 | 3,520 | $6,700,000 | 2026-04-22 |
| 635 Curtiswood Dr | single_family | 6 | 6 | 3,888 | $4,950,000 | 2026-04-20 |
| 180 Cape Florida Dr | single_family | 6 | 8 | 8,031 | $21,000,000 | 2026-02-26 |
| 320 Atlantic Rd | single_family | 6 | 7 | 5,275 | $8,200,000 | 2026-02-25 |
| 320 Woodcrest Rd | single_family | 6 | 5 | 3,737 | $5,220,000 | 2025-10-06 |
Same ZIP. Other properties currently for sale nearby — asking prices, not closed sale prices. Not a price comp; see Sold comps for actual transaction history.
| Address | Type | Beds | Baths | Sqft | Asking price | Days on market |
|---|---|---|---|---|---|---|
| 960 Mariner Dr | single_family | 6 | 10 | 7,742 | $19,500,000 | — |
| 420 Island Dr | single_family | 6 | 8 | 6,405 | $12,485,000 | — |
| 120 Knollwood Dr | single_family | 6 | 7 | 6,208 | $19,950,000 | — |
| 650 Curtiswood Dr | single_family | 6 | 5 | 3,356 | $5,199,000 | — |
| 31 Island Dr | single_family | 6 | 7 | 5,826 | $9,800,000 | — |
| 165 Hampton Ln | single_family | 6 | 9 | 3,842 | $8,250,000 | — |
| 238 Buttonwood Dr | single_family | 6 | 7 | 4,190 | $8,500,000 | — |
| 544 Warren Ln | single_family | 6 | 6 | 1,044 | $8,000,000 | — |
10-year hold projection
IRR-5.6%
Equity multiple0.06x
Total return (10yr)-$717,179
| Year | Property value | NOI | Cash flow | Loan balance | Equity |
|---|---|---|---|---|---|
| 1 | $7,107,000 | $38,160 | -$400,416 | $5,460,151 | $1,646,849 |
| 2 | $7,320,210 | $40,301 | -$398,598 | $5,396,192 | $1,924,018 |
| 3 | $7,539,816 | $42,531 | -$396,698 | $5,327,841 | $2,211,976 |
| 4 | $7,766,011 | $44,853 | -$394,715 | $5,254,796 | $2,511,215 |
| 5 | $7,998,991 | $47,271 | -$392,644 | $5,176,735 | $2,822,256 |
| 6 | $8,238,961 | $49,789 | -$390,483 | $5,093,313 | $3,145,647 |
| 7 | $8,486,130 | $52,409 | -$388,227 | $5,004,163 | $3,481,966 |
| 8 | $8,740,714 | $55,137 | -$385,874 | $4,908,891 | $3,831,822 |
| 9 | $9,002,935 | $57,975 | -$383,419 | $4,807,077 | $4,195,858 |
| 10 | $9,273,023 | $60,927 | -$380,859 | $4,698,270 | $4,574,753 |
Assumes 3.0% annual rent growth, 2.5% expense growth, 3.0% appreciation, and a 6.0% selling cost at exit — all placeholder assumptions, not market-derived.