571 Glenridge Rd
Key Biscayne, FL 33149 · single_family · For Sale · 97 days on market
Asking price$7,490,000
5 beds 7 baths 3,768 sqft
Suggested offer$5,391,050$2,098,950 above the est. market value of $5,391,050.
View on Realtor.com →Listed by Dora Puig · Luxe Living Realty
Typesingle_family
Built2025
Price / sqft$1988
Est. value (own analysis)$5,391,050
Rent estimate (own analysis)$28,000/mo
HOANone
1 / 46
Show every detail
Statusfor_sale
Listed date2026-05-28
Removed date—
MLSMiamiMLS #A12025834
Coordinates25.69103, -80.16574
Address571 Glenridge Rd
CityKey Biscayne
StateFL
Zip33149
Listing ID6260611827
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 | $7,490,000 |
| Down payment (20.0%) | $1,498,000 |
| Loan amount | $5,992,000 |
| Closing costs (5.0%) | $374,500 |
| Total cash to close | $1,872,500 |
| Income | |
| Rent (comp-derived) | $28,000$336,000 |
| Vacancy loss (8.0%) | |
| Effective gross income | $25,760$309,120 |
| Operating expenses | |
| Property tax (placeholder 1.9% of price) | $11,859$142,310 |
| Insurance (placeholder 0.8% of price) | $4,993$59,920 |
| HOA dues | $0$0 |
| Management (0.0% of EGI) | $0$0 |
| Maintenance (5.0% of GSR) | $1,400$16,800 |
| Total operating expenses | $18,253$219,030 |
| 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) | $1,400$16,800 |
| 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 | 5 | 6 | 3,650 | $28,500 | 2026-05-19 | — | |
| single_family | 5 | 6 | 3,495 | $20,000 | 2026-06-10 | — | |
| single_family | 5 | 6 | 3,661 | $55,000 | 2026-07-20 | — | |
| single_family | 5 | 5 | 3,202 | $40,000 | 2026-03-28 | — | |
| single_family | 5 | 6 | 3,633 | $21,500 | 2026-05-21 | — | |
| single_family | 5 | 5 | 3,149 | $22,000 | 2026-07-01 | — | |
| single_family | 5 | 7 | 3,475 | $27,500 | 2026-05-21 | — | |
| single_family | 5 | 6 | 4,700 | $35,500 | 2026-03-18 | — |
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 |
|---|---|---|---|---|---|---|
| 346 Gulf Rd | single_family | 5 | 6 | 3,285 | $4,700,000 | 2026-07-27 |
| 677 Hampton Ln | single_family | 5 | 4 | 2,429 | $3,125,000 | 2026-03-09 |
| 670 Allendale Rd | single_family | 5 | 5 | 2,320 | $3,475,000 | 2026-01-27 |
| 261 Greenwood Dr | single_family | 5 | 6 | 3,525 | $6,275,000 | 2025-12-11 |
| 201 Buttonwood Dr | single_family | 5 | 5 | 3,791 | $5,265,000 | 2025-12-09 |
| 100 Hampton Ln | single_family | 5 | 6 | 3,584 | $6,200,000 | 2025-12-04 |
| 220 Cypress Dr | single_family | 5 | 6 | 4,089 | $4,600,000 | 2025-10-10 |
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 |
|---|---|---|---|---|---|---|
| 485 W Matheson Dr | single_family | 5 | 9 | 11,528 | $237,000,000 | — |
| 501 Bay Ln | single_family | 5 | 5 | 4,759 | $5,990,000 | — |
| 520 S Mashta Dr | single_family | 5 | 4 | 3,085 | $19,900,000 | — |
| 545 Sabal Palm Dr | single_family | 5 | 5 | 4,166 | $7,950,000 | — |
| 24 Grand Bay Estates Cir | single_family | 5 | 6 | 4,220 | $4,950,000 | — |
| 524 Warren Ln | single_family | 5 | 4 | 2,700 | $3,730,000 | — |
| 445 Grand Bay Dr Ph 1A | condos | 5 | 6 | 8,435 | $18,900,000 | — |
| 445 Ridgewood Rd | single_family | 5 | 6 | 3,688 | $6,685,000 | — |
10-year hold projection
IRR-4.0%
Equity multiple0.34x
Total return (10yr)-$251,197
| Year | Property value | NOI | Cash flow | Loan balance | Equity |
|---|---|---|---|---|---|
| 1 | $7,714,700 | $90,090 | -$388,785 | $5,927,033 | $1,787,667 |
| 2 | $7,946,141 | $93,888 | -$385,407 | $5,857,605 | $2,088,536 |
| 3 | $8,184,525 | $97,827 | -$381,898 | $5,783,410 | $2,401,116 |
| 4 | $8,430,061 | $101,912 | -$378,254 | $5,704,119 | $2,725,942 |
| 5 | $8,682,963 | $106,149 | -$374,469 | $5,619,383 | $3,063,580 |
| 6 | $8,943,452 | $110,542 | -$370,540 | $5,528,829 | $3,414,623 |
| 7 | $9,211,755 | $115,098 | -$366,460 | $5,432,055 | $3,779,700 |
| 8 | $9,488,108 | $119,821 | -$362,224 | $5,328,637 | $4,159,471 |
| 9 | $9,772,751 | $124,717 | -$357,827 | $5,218,116 | $4,554,635 |
| 10 | $10,065,934 | $129,793 | -$353,262 | $5,100,006 | $4,965,927 |
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.