646 NE 81st St

Miami, FL 33138 · single_family · Pending — under contract · 86 days on market
Asking price$2,450,000
4 beds 5 baths 3,530 sqft
View on Realtor.com →
Listed by Kathrin Rein · Keller Williams Miami Beach
Typesingle_family
Built1925
Price / sqft$694
Est. value (own analysis)$2,717,888
Rent estimate (own analysis)$14,750/mo
HOANone
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Neighborhood

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Statusfor_sale
Listed date2026-06-08
Removed date
MLSMiamiMLS #A12029329
Coordinates25.84922, -80.18366
Address646 NE 81st St
CityMiami
StateFL
Zip33138
Listing ID5476779099
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)

Purchase price$2,450,000
Down payment (20.0%)$490,000
Loan amount$1,960,000
Closing costs (5.0%)$122,500
Total cash to close$612,500
Rent (comp-derived)$14,750$177,000
Vacancy loss (8.0%)

Vacancy Loss

Gross Scheduled Rent × Vacancy Rate

Gross scheduled rent (annual) comp$177,000
Vacancy rate (assumption) assumption8.0%

$177,000 × 8.0% = $14,160

Effective gross income$13,570$162,840
Property tax (placeholder 1.9% of price)$3,879$46,550
Insurance (placeholder 0.8% of price)$1,633$19,600
HOA dues$0$0
Management (0.0% of EGI)$0$0
Maintenance (5.0% of GSR)$738$8,850
Total operating expenses$6,250$75,000
Net operating income (NOI)

Net Operating Income (NOI)

Effective Gross Income − Total Operating Expenses

Effective gross income derived$162,840
Total operating expenses derived$75,000

$162,840 − $75,000 = $87,840

Debt service (6.66%, avg 30yr rate as of 2026-08-27, 30yr amortizing)

Monthly Principal & Interest

Standard amortization on the loan amount, at the effective rate and term

Loan amount derived$1,960,000
Interest rate (avg 30yr rate) comp6.7%
Term (assumption) assumption30 years

$1,960,000 amortized at 6.7% over 30 years = $12,595/mo

CapEx reserve (5.0% of GSR)$738$8,850
Mortgage insurance (PMI) (0.0% of loan, not required — down payment ≥ 20%)$0$0
Cash flow

Monthly Cash Flow

(NOI − Annual Debt Service − Annual CapEx Reserve − Annual PMI) ÷ 12

NOI derived$87,840
Annual debt service derived$151,146
Annual CapEx reserve assumption$8,850
Annual PMI assumption$0

($87,840 − $151,146 − $8,850 − $0) ÷ 12 = -$6,013

Cap rate

Cap Rate

NOI ÷ Purchase Price

NOI derived$87,840
Purchase price data$2,450,000

$87,840 ÷ $2,450,000 = 3.6%

Cash-on-cash

Cash-on-Cash Return

Annual Cash Flow ÷ Total Cash Invested

Annual cash flow derived-$72,156
Total cash to close derived$612,500

-$72,156 ÷ $612,500 = -11.8%

DSCR

Debt Service Coverage Ratio (DSCR)

NOI ÷ Annual Debt Service

NOI derived$87,840
Annual debt service derived$151,146

$87,840 ÷ $151,146 = 0.58

Rent-to-price (1% rule)

Rent-to-Price (the "1% rule")

(Gross Scheduled Rent ÷ 12) ÷ Purchase Price

Gross scheduled rent (annual) comp$177,000
Purchase price data$2,450,000

($177,000 ÷ 12) ÷ $2,450,000 = 0.6%

Gross rent multiplier

Gross Rent Multiplier (GRM)

Purchase Price ÷ Gross Scheduled Rent

Purchase price data$2,450,000
Gross scheduled rent (annual) comp$177,000

$2,450,000 ÷ $177,000 = 13.8

Operating expense ratio

Operating Expense Ratio

Total Operating Expenses ÷ Effective Gross Income

Total operating expenses derived$75,000
Effective gross income derived$162,840

$75,000 ÷ $162,840 = 46.1%

Break-even occupancy

Break-Even Occupancy

(Total OpEx + Annual Debt Service + Annual PMI) ÷ Gross Scheduled Rent

Total operating expenses derived$75,000
Annual debt service derived$151,146
Annual PMI assumption$0
Gross scheduled rent (annual) comp$177,000

($75,000 + $151,146 + $0) ÷ $177,000 = 127.8%

Comparables

Same ZIP. Real active rental listings, used to derive the rent estimate above.

AddressTypeBedsBathsSqftAsking rentListedDays on market
single_family432,948$17,5002026-08-18
single_family432,311$15,5002026-08-15
single_family432,890$19,0002026-07-17
single_family442,347$14,0002026-07-16
single_family432,454$10,5002026-07-13
single_family432,890$14,5002026-07-07
single_family443,249$15,0002026-06-18
single_family432,960$12,0002026-07-14

8670 Arboretum Ln

Miami, 33138 · rent comp

Bedrooms / bathrooms4 bd / 3 ba
Square footage2,948
Listed2026-08-18
Days on market

Asking rent: $17,500

View on Zillow →

1109 NE 89th St

Miami, 33138 · rent comp

Bedrooms / bathrooms4 bd / 3 ba
Square footage2,311
Listed2026-08-15
Days on market

Asking rent: $15,500

View on Zillow →

8641 Arboretum Ln

Miami, 33138 · rent comp

Bedrooms / bathrooms4 bd / 3 ba
Square footage2,890
Listed2026-07-17
Days on market

Asking rent: $19,000

View on Zillow →

899 NE 71st St

Miami, 33138 · rent comp

Bedrooms / bathrooms4 bd / 4 ba
Square footage2,347
Listed2026-07-16
Days on market

Asking rent: $14,000

View on Zillow →

935 NE 72nd Ter

Miami, 33138 · rent comp

Bedrooms / bathrooms4 bd / 3 ba
Square footage2,454
Listed2026-07-13
Days on market

Asking rent: $10,500

View on Zillow →

8631 Arboretum Ln

Miami, 33138 · rent comp

Bedrooms / bathrooms4 bd / 3 ba
Square footage2,890
Listed2026-07-07
Days on market

Asking rent: $14,500

View on Zillow →

8919 NE 10th Ave

Miami, 33138 · rent comp

Bedrooms / bathrooms4 bd / 4 ba
Square footage3,249
Listed2026-06-18
Days on market

Asking rent: $15,000

View on Zillow →

766 NE 96th St

Miami Shores, 33138 · rent comp

Bedrooms / bathrooms4 bd / 3 ba
Square footage2,960
Listed2026-07-14
Days on market

Asking rent: $12,000

View on Zillow →

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.

AddressTypeBedsBathsLiving sqftSale priceSale date
9301 N Bayshore Drsingle_family454,225$8,000,0002026-08-18
1090 NE 92nd Stsingle_family423,227$2,435,0002026-07-22
6322 NE 5th Avesingle_family422,161$840,0002026-07-17
1110 NE 100th Stsingle_family432,191$1,680,0002026-07-15
9655 Biscayne Blvdsingle_family423,450$1,150,0002026-06-22
1131 NE 97th Stsingle_family43$1,648,0002026-06-17
8625 NE 10th Avesingle_family463,696$3,700,0002026-06-08
1291 NE 102nd Stsingle_family442,202$2,500,0002026-06-08
9700 Biscayne Blvdsingle_family422,609$1,687,5002026-06-05
89 NE 106th Stsingle_family452,546$2,475,0002026-05-22
9015 NE 10th Avesingle_family442,975$2,300,0002026-05-21
575 NE 97th Stsingle_family432,589$1,850,0002026-05-19
1017 NE 95th Stsingle_family431,883$1,625,0002026-04-30
490 NE 91st Stsingle_family443,145$2,225,0002026-04-23
1029 NE 104th Stsingle_family432,775$1,880,0002026-04-16
8825 NE 10th Avesingle_family442,060$2,050,0002026-04-06
46 NE 100th Stsingle_family422,139$1,098,8882026-04-01
710 NE 72nd Tersingle_family442,304$2,150,0002026-03-25
1075 NE 99th Stsingle_family432,464$2,750,0002026-03-20
920 NE 99th Stsingle_family432,237$1,350,0002026-03-13
540 NE 103rd Stsingle_family433,036$2,350,0002026-03-05
7701 NE 8th Avesingle_family422,305$2,750,0002026-02-25
751 NE 80th Stsingle_family431,519$1,000,0002026-02-20
925 NE 92nd Stsingle_family442,400$1,650,0002026-02-13
871 NE 81st Stsingle_family433,486$1,410,0002026-02-03
861 NE 82nd Stsingle_family432,356$1,395,0002026-01-26
1250 NE 87th Stsingle_family433,312$3,887,5002026-01-16
20 NE 104th Stsingle_family432,319$1,800,0002026-01-15
1120 NE 86th Stsingle_family441,994$1,800,0002026-01-14
1000 NE Little River Drsingle_family442,964$4,400,0002026-01-02
8301 NE 10th Avesingle_family442,691$2,250,0002025-12-16
991 NE 82nd Stsingle_family432,361$1,040,0002025-12-11
820 NE 80th Stsingle_family432,638$1,102,5002025-11-14

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.

AddressTypeBedsBathsSqftAsking priceDays on market
1085 NE 84th Stsingle_family431,925$1,299,000
670 NE 87th Stmulti_family421,584$850,000
685 NE 81st Stsingle_family433,129$2,850,000
533-535 NE 67th Stmulti_family441,000$1,059,000
776 NE 74th Stsingle_family441,834$1,950,000
420 NE 62nd St Unit Bcondos452,786$1,850,000
420 NE 62nd St Unit Atownhomes452,786$1,850,000
910 NE 81st Stsingle_family431,808$1,480,000

10-year hold projection

IRR2.3%
Equity multiple1.38x
Total return (10yr)$550,285
YearProperty valueNOICash flowLoan balanceEquity
1$2,523,500$87,840-$72,156$1,938,749$584,751
2$2,599,205$90,850-$69,367$1,916,039$683,166
3$2,677,181$93,960-$66,484$1,891,770$785,412
4$2,757,497$97,173-$63,504$1,865,833$891,663
5$2,840,221$100,492-$60,423$1,838,116$1,002,106
6$2,925,428$103,921-$57,238$1,808,495$1,116,933
7$3,013,191$107,462-$53,947$1,776,841$1,236,350
8$3,103,587$111,121-$50,545$1,743,012$1,360,575
9$3,196,694$114,901-$47,028$1,706,860$1,489,834
10$3,292,595$118,805-$43,394$1,668,226$1,624,369
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.
All figures are estimates for evaluation purposes only, not investment, tax, legal, or insurance advice. Property tax is estimated from a real matched tax bill or millage rate when available, a placeholder % of price otherwise; insurance is scaled by flood and wind risk where those are known and a flat percentage otherwise — never a real quote. Verify all of them, along with association restrictions and permit status, before committing capital. Rent estimates come from real comps or Zillow’s ZIP index, not appraisals.