421 NE 70th St
Miami, FL 33138 · single_family · For Sale · 16 days on market
Asking price$980,000
5 beds 3 baths 1,147 sqft
Listed by Belkys Amory · Fortune Christie's International Real Estate
Typesingle_family
Built1929
Price / sqft$854
Est. value (own analysis)$1,048,749
Rent estimate (own analysis)$25,000/mo
HOANone
Wind10/10Extreme$Heat10/10ExtremeFlood5/10major$Air2/10MinorWildfire1/10Minimal
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⚠ Cap rate of 23.3% is above the 20% sanity ceiling — verify the underlying price, rent, and expense data before trusting this. Cash-on-cash return of 62.5% is above the 50% sanity ceiling for a standard buy-and-hold — verify inputs before trusting this.
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Statusfor_sale
Listed date2026-08-17
Removed date—
MLSMiamiMLS #A12072527
Coordinates25.83978, -80.18772
Address421 NE 70th St
CityMiami
StateFL
Zip33138
Listing ID5854458023
Sourceus-real-estate-listings, cached 2026-08-30
ZIP market snapshot (33138)
Typical home value (ZHVI)$806,988
Typical rent (ZORI)$2,367/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 | $980,000 |
| Down payment (20.0%) | $196,000 |
| Loan amount | $784,000 |
| Closing costs (5.0%) | $49,000 |
| Total cash to close | $245,000 |
| Income | |
| Rent (comp-derived) | $25,000$300,000 |
| Vacancy loss (8.0%) | |
| Effective gross income | $23,000$276,000 |
| Operating expenses | |
| Property tax (placeholder 1.9% of price) | $1,552$18,620 |
| Insurance (est. scaled by flood & wind risk) | $1,143$13,720 |
| HOA dues | $0$0 |
| Management (0.0% of EGI) | $0$0 |
| Maintenance (5.0% of GSR) | $1,250$15,000 |
| Total operating expenses | $3,945$47,340 |
| 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) | $1,250$15,000 |
| 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 | 4,646 | $45,000 | 2026-08-13 | — | |
| single_family | 5 | 4 | 2,368 | $16,000 | 2026-08-12 | — | |
| single_family | 5 | 4 | 3,029 | $24,500 | 2026-06-17 | — | |
| single_family | 5 | 5 | 3,600 | $25,000 | 2026-05-18 | — | |
| single_family | 5 | 6 | — | $50,000 | 2026-02-13 | — | |
| single_family | 5 | 4 | 2,150 | $8,500 | 2025-11-25 | — | |
| single_family | 5 | 4 | 4,119 | $25,000 | 2026-03-05 | — | |
| single_family | 5 | 4 | 3,143 | $18,000 | 2026-06-08 | — | |
| single_family | 5 | 5 | 3,429 | $27,000 | 2026-08-30 | — |
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 |
|---|---|---|---|---|---|---|
| 436 NE 88th St | single_family | 5 | 2 | 2,324 | $2,050,000 | 2026-08-12 |
| 390 NE 103rd St | single_family | 5 | 4 | 2,770 | $1,690,000 | 2026-07-31 |
| 1234 NE 96th St | single_family | 5 | 6 | 5,812 | $3,125,000 | 2026-07-24 |
| 1009 NE 104th St | single_family | 5 | 5 | 4,156 | $3,800,000 | 2026-06-15 |
| 967 NE 78th St | single_family | 5 | 6 | 3,480 | $4,350,000 | 2026-06-10 |
| 7333 Belle Meade Blvd | single_family | 5 | 6 | 4,382 | $9,200,000 | 2026-06-08 |
| 144 NE 91st St | single_family | 5 | 4 | 2,431 | $1,227,500 | 2026-06-05 |
| 1200 NE 94th St | single_family | 5 | 6 | 5,155 | $6,600,000 | 2026-06-05 |
| 941 NE 92nd St | single_family | 5 | 5 | 4,504 | $4,200,000 | 2026-06-02 |
| 549 NE 95th St | single_family | 5 | 7 | 5,109 | $6,400,000 | 2026-05-21 |
| 769 NE 72nd Ter | single_family | 5 | 7 | 4,210 | $5,100,000 | 2026-05-19 |
| 1039 NE 72nd St | single_family | 5 | 4 | 5,184 | $8,650,000 | 2026-05-14 |
| 692 NE 70th St | single_family | 5 | 3 | 2,997 | $2,000,000 | 2026-05-04 |
| 1000 NE 89th St | single_family | 5 | 7 | 3,742 | $2,550,000 | 2026-04-23 |
| 754 NE 71st St | single_family | 5 | 3 | 3,192 | $1,500,000 | 2026-03-17 |
| 9800 NE 13th Ave | single_family | 5 | 4 | 3,616 | $2,400,000 | 2026-02-13 |
| 165 NE 70th St | single_family | 5 | 3 | 1,832 | $440,000 | 2026-02-13 |
| 741 NE 70th St | single_family | 5 | 4 | 3,012 | $2,100,000 | 2026-01-30 |
| 309 NE 99th St | single_family | 5 | 6 | 5,119 | $5,420,000 | 2026-01-12 |
| 1075 NE 89th St | single_family | 5 | 4 | 3,225 | $2,830,000 | 2026-01-08 |
| 1501 NE 103rd St | single_family | 5 | 4 | 4,076 | $4,500,000 | 2025-12-23 |
| 7305 Belle Meade Island Dr | single_family | 5 | 7 | 5,805 | $10,555,600 | 2025-12-16 |
| 1070 NE 93rd St | single_family | 5 | 6 | 3,240 | $3,500,000 | 2025-12-05 |
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 |
|---|---|---|---|---|---|---|
| 1155 NE 89th St | single_family | 5 | 6 | — | $10,000,000 | — |
| 7725 NE 8th Ave | single_family | 5 | 6 | 4,504 | $10,000,000 | — |
| 900 NE 75th St | single_family | 5 | 6 | 5,378 | $8,950,000 | — |
| 1141 NE 90th St | single_family | 5 | 5 | — | $4,950,000 | — |
| 994-990 NE 78th | single_family | 5 | 5 | 3,255 | $7,500,000 | — |
| 789 NE 83rd St | single_family | 5 | 4 | 5,400 | $5,000,000 | — |
| 7111 NE 10th Ave | single_family | 5 | 6 | 7,065 | $17,200,000 | — |
| 7105 NE 10th Ave | single_family | 5 | 6 | 7,169 | $17,500,000 | — |
10-year hold projection
IRR67.1%
Equity multiple9.93x
Total return (10yr)$2,314,776
| Year | Property value | NOI | Cash flow | Loan balance | Equity |
|---|---|---|---|---|---|
| 1 | $1,009,400 | $228,660 | $153,202 | $775,500 | $233,900 |
| 2 | $1,039,682 | $235,757 | $159,923 | $766,416 | $273,266 |
| 3 | $1,070,872 | $243,072 | $166,854 | $756,708 | $314,165 |
| 4 | $1,102,999 | $250,613 | $174,001 | $746,333 | $356,666 |
| 5 | $1,136,089 | $258,386 | $181,370 | $735,246 | $400,843 |
| 6 | $1,170,171 | $266,399 | $188,969 | $723,398 | $446,774 |
| 7 | $1,205,276 | $274,659 | $196,805 | $710,736 | $494,541 |
| 8 | $1,241,435 | $283,173 | $204,884 | $697,204 | $544,230 |
| 9 | $1,278,678 | $291,949 | $213,215 | $682,744 | $595,934 |
| 10 | $1,317,038 | $300,996 | $221,805 | $667,290 | $649,748 |
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.