881 Ocean Dr Apt 10A

Key Biscayne, FL 33149 · condos · For Sale · 6 days on market
Asking price$3,750,000
3 beds 3 baths 3,120 sqft
Suggested offer$3,154,098$595,902 above the est. market value of $3,154,098.
View on Realtor.com →
Listed by Carl Cronwall · One Sotheby's International Realty
Typecondos
Built1971
Price / sqft$1202
Est. value (own analysis)$3,154,098
Rent estimate (own analysis)$16,250/mo
HOA$2,235/mo
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Neighborhood

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Statusfor_sale
Listed date2026-08-27
Removed date
MLSMiamiMLS #A12074574
Coordinates25.68567, -80.15725
Address881 Ocean Dr Apt 10A
CityKey Biscayne
StateFL
Zip33149
Listing ID6187756909
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)

Purchase price$3,750,000
Down payment (20.0%)$750,000
Loan amount$3,000,000
Closing costs (5.0%)$187,500
Total cash to close$937,500
Rent (comp-derived)$16,250$195,000
Vacancy loss (8.0%)

Vacancy Loss

Gross Scheduled Rent × Vacancy Rate

Gross scheduled rent (annual) comp$195,000
Vacancy rate (assumption) assumption8.0%

$195,000 × 8.0% = $15,600

Effective gross income$14,950$179,400
Property tax (placeholder 1.9% of price)$5,938$71,250
Insurance (placeholder 0.8% of price)$2,500$30,000
HOA dues$2,235$26,820
Management (0.0% of EGI)$0$0
Maintenance (5.0% of GSR)$813$9,750
Total operating expenses$11,485$137,820
Net operating income (NOI)

Net Operating Income (NOI)

Effective Gross Income − Total Operating Expenses

Effective gross income derived$179,400
Total operating expenses derived$137,820

$179,400 − $137,820 = $41,580

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$3,000,000
Interest rate (avg 30yr rate) comp6.7%
Term (assumption) assumption30 years

$3,000,000 amortized at 6.7% over 30 years = $19,279/mo

CapEx reserve (5.0% of GSR)$813$9,750
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$41,580
Annual debt service derived$231,346
Annual CapEx reserve assumption$9,750
Annual PMI assumption$0

($41,580 − $231,346 − $9,750 − $0) ÷ 12 = -$16,626

Cap rate

Cap Rate

NOI ÷ Purchase Price

NOI derived$41,580
Purchase price data$3,750,000

$41,580 ÷ $3,750,000 = 1.1%

Cash-on-cash

Cash-on-Cash Return

Annual Cash Flow ÷ Total Cash Invested

Annual cash flow derived-$199,516
Total cash to close derived$937,500

-$199,516 ÷ $937,500 = -21.3%

DSCR

Debt Service Coverage Ratio (DSCR)

NOI ÷ Annual Debt Service

NOI derived$41,580
Annual debt service derived$231,346

$41,580 ÷ $231,346 = 0.18

Rent-to-price (1% rule)

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

(Gross Scheduled Rent ÷ 12) ÷ Purchase Price

Gross scheduled rent (annual) comp$195,000
Purchase price data$3,750,000

($195,000 ÷ 12) ÷ $3,750,000 = 0.4%

Gross rent multiplier

Gross Rent Multiplier (GRM)

Purchase Price ÷ Gross Scheduled Rent

Purchase price data$3,750,000
Gross scheduled rent (annual) comp$195,000

$3,750,000 ÷ $195,000 = 19.2

Operating expense ratio

Operating Expense Ratio

Total Operating Expenses ÷ Effective Gross Income

Total operating expenses derived$137,820
Effective gross income derived$179,400

$137,820 ÷ $179,400 = 76.8%

Break-even occupancy

Break-Even Occupancy

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

Total operating expenses derived$137,820
Annual debt service derived$231,346
Annual PMI assumption$0
Gross scheduled rent (annual) comp$195,000

($137,820 + $231,346 + $0) ÷ $195,000 = 189.3%

Comparables

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

AddressTypeBedsBathsSqftAsking rentListedDays on market
condos332,510$25,0002026-08-25
apartment332,470$17,0002026-08-18
condos342,950$10,0002026-03-19
condos332,220$12,5002026-05-27
condos332,470$15,0002026-08-13
condos342,228$13,8002026-07-03
condos332,510$16,0002026-05-05
condos353,480$22,0002026-07-06
condos353,354$32,0002026-08-27
condos333,120$22,0002026-08-06
condos332,523$12,5002026-04-23
condos332,220$16,0002026-04-23
condos332,387$12,0002026-07-17
condos332,470$16,0002026-05-06
condos332,477$15,5002026-02-06
condos332,073$16,6712025-06-03
condos352,500$19,0002026-04-01
condos352,500$18,0002026-04-13
condos332,366$16,0002026-07-17
condos352,257$29,8002026-01-30
condos332,281$12,5002026-08-27
condos332,470$17,000
condos332,174$12,5002026-08-31
condos352,500$20,0002026-08-31
condos332,510$20,0002026-08-31
condos343,091$16,5002026-08-31

791 Crandon Blvd Ph 4

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 3 ba
Square footage2,510
Listed2026-08-25
Days on market

Asking rent: $25,000

View on Zillow →

739 Crandon Blvd Apt 202

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 3 ba
Square footage2,470
Listed2026-08-18
Days on market

Asking rent: $17,000

View on Zillow →

445 Grand Bay Dr Apt 310

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 4 ba
Square footage2,950
Listed2026-03-19
Days on market

Asking rent: $10,000

View on Zillow →

735 Crandon Blvd Apt 503

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 3 ba
Square footage2,220
Listed2026-05-27
Days on market

Asking rent: $12,500

View on Zillow →

731 Crandon Blvd Apt 208

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 3 ba
Square footage2,470
Listed2026-08-13
Days on market

Asking rent: $15,000

View on Zillow →

1111 Crandon Blvd Apt C1104

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 4 ba
Square footage2,228
Listed2026-07-03
Days on market

Asking rent: $13,800

View on Zillow →

791 Crandon Blvd Apt 404

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 3 ba
Square footage2,510
Listed2026-05-05
Days on market

Asking rent: $16,000

View on Zillow →

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 5 ba
Square footage3,480
Listed2026-07-06
Days on market

Asking rent: $22,000

View on Zillow →

360 Ocean Dr Unit 1102S

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 5 ba
Square footage3,354
Listed2026-08-27
Days on market

Asking rent: $32,000

View on Zillow →

881 Ocean Dr Apt 11H

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 3 ba
Square footage3,120
Listed2026-08-06
Days on market

Asking rent: $22,000

View on Zillow →

600 Grapetree Dr Apt 3BS

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 3 ba
Square footage2,523
Listed2026-04-23
Days on market

Asking rent: $12,500

View on Zillow →

747 Crandon Blvd Ph 10

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 3 ba
Square footage2,220
Listed2026-04-23
Days on market

Asking rent: $16,000

View on Zillow →

101 Sunrise Dr Unit A201

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 3 ba
Square footage2,387
Listed2026-07-17
Days on market

Asking rent: $12,000

View on Zillow →

733 Crandon Blvd Apt 406

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 3 ba
Square footage2,470
Listed2026-05-06
Days on market

Asking rent: $16,000

View on Zillow →

765 Crandon Blvd Apt 306

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 3 ba
Square footage2,477
Listed2026-02-06
Days on market

Asking rent: $15,500

View on Zillow →

101 Crandon Blvd Apt 480

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 3 ba
Square footage2,073
Listed2025-06-03
Days on market

Asking rent: $16,671

View on Zillow →

785 Crandon Blvd Apt 803

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 5 ba
Square footage2,500
Listed2026-04-01
Days on market

Asking rent: $19,000

View on Zillow →

789 Crandon Blvd Apt 1003

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 5 ba
Square footage2,500
Listed2026-04-13
Days on market

Asking rent: $18,000

View on Zillow →

600 Grapetree Dr Apt 7CS

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 3 ba
Square footage2,366
Listed2026-07-17
Days on market

Asking rent: $16,000

View on Zillow →

360 Ocean Dr Unit 606S

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 5 ba
Square footage2,257
Listed2026-01-30
Days on market

Asking rent: $29,800

View on Zillow →

600 Grapetree Dr Apt 7ES

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 3 ba
Square footage2,281
Listed2026-08-27
Days on market

Asking rent: $12,500

View on Zillow →

739 Crandon Blvd # CU202

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 3 ba
Square footage2,470
Listed
Days on market

Asking rent: $17,000

View on Zillow →

791 Crandon Blvd Apt 301

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 3 ba
Square footage2,174
Listed2026-08-31
Days on market

Asking rent: $12,500

View on Zillow →

789 Crandon Blvd Apt 1603

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 5 ba
Square footage2,500
Listed2026-08-31
Days on market

Asking rent: $20,000

View on Zillow →

791 Crandon Blvd Apt 704

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 3 ba
Square footage2,510
Listed2026-08-31
Days on market

Asking rent: $20,000

View on Zillow →

765 Crandon Blvd Apt 507

Key Biscayne, 33149 · rent comp

Bedrooms / bathrooms3 bd / 4 ba
Square footage3,091
Listed2026-08-31
Days on market

Asking rent: $16,500

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
1111 Crandon Blvd Apt C902condos321,782$1,480,0002026-08-20
765 Crandon Blvd Ph 4condos332,602$3,045,0002026-08-13
781 Crandon Blvd Apt 804condos352,500$3,975,0002026-08-12
605 Ocean Dr Apt 7Lcondos331,772$2,525,0002026-07-31
791 Crandon Blvd Apt 405condos353,084$3,950,0002026-07-17
141 Crandon Blvd Apt 331condos321,790$1,330,0002026-07-16
141 Crandon Blvd Apt 237condos321,600$1,200,0002026-07-10
1121 Crandon Blvd Apt F206condos321,782$1,230,0002026-07-09
350 Ocean Dr Unit 201Ncondos352,357$5,150,0002026-06-29
600 Grapetree Dr Apt 3DScondos321,889$1,700,0002026-06-15
101 Crandon Blvd Apt 367condos321,720$1,380,0002026-06-11
727 Crandon Blvd Apt 502condos332,497$2,600,0002026-06-05
1111 Crandon Blvd Apt C205condos332,208$1,535,0002026-06-01
141 Crandon Blvd Apt 446condos321,943$1,400,0002026-05-29
701 Crandon Blvd Apt 302condos331,830$1,850,0002026-05-25
1111 Crandon Blvd Apt B807condos321,782$2,500,0002026-05-22
200 Sunrise Dr Unit 200Dcondos331,550$1,400,0002026-05-18
781 Crandon Blvd Apt 1603condos342,500$4,200,0002026-05-15
781 Crandon Blvd Apt 801condos343,093$4,900,0002026-04-28
430 Grand Bay Dr Apt 902condos363,950$5,240,0002026-04-20
1121 Crandon Blvd Apt F802condos332,402$2,750,0002026-04-06
141 Crandon Blvd Apt 338condos321,720$970,0002026-03-24
50 Ocean Lane Dr Apt 108condos321,360$965,0002026-03-20
703 Crandon Blvd Ph 3condos321,570$1,650,0002026-03-17
177 Ocean Lane Dr Apt 1101condos331,930$2,750,0002026-03-10
161 Crandon Blvd Apt 419condos321,600$1,200,0002026-02-27
161 Crandon Blvd Apt 125condos331,864$1,770,0002026-02-17
765 Crandon Blvd Apt 202condos332,602$2,200,0002026-02-06
785 Crandon Blvd Apt 603condos352,500$2,990,0002026-01-30
711 Crandon Blvd Apt 401condos321,700$1,925,0002026-01-17
785 Crandon Blvd Apt 302condos332,100$2,100,0002026-01-15
101 Ocean Lane Dr Apt 1017condos321,734$1,150,0002026-01-10
650 Ocean Dr Apt 10Econdos321,518$995,0002025-12-29
789 Crandon Blvd Apt 403condos352,500$2,500,0002025-12-18
201 Crandon Blvd Apt 333condos321,541$1,200,0002025-12-15
240 Galen Dr Apt 308condos321,100$680,0002025-12-12
785 Crandon Blvd Apt 1106condos352,790$5,125,0002025-12-10
791 Crandon Blvd Apt 1506condos353,084$4,975,0002025-12-10
791 Crandon Blvd Apt 1404condos332,510$4,500,0002025-12-01
765 Crandon Blvd Apt 305condos332,602$2,150,0002025-11-06
199 Ocean Lane Dr Apt 1005condos342,155$2,250,0002025-10-22
765 Crandon Blvd Ph 12condos353,112$2,850,0002025-10-22
765 Crandon Blvd Apt 510condos332,602$2,700,0002025-10-14
799 Crandon Blvd Apt 1208condos353,011$4,950,0002025-10-10
605 Ocean Dr Apt 6Mcondos331,772$2,500,0002025-09-19
445 Grand Bay Dr Apt 601condos332,570$2,662,5002025-09-12
161 Crandon Blvd Apt 325condos321,715$1,180,0002025-09-05

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.

AddressTypeBedsBathsSqftAsking priceDays on market
condos321,847$1,360,000
550 Ocean Dr Apt 3Hcondos32$720,000
600 Grapetree Dr Apt 6BScondos332,523$2,300,000
170 Ocean Lane Dr Apt 305condos321,435$1,150,000
240 Galen Dr Apt 109condos321,100$740,000
181 Crandon Blvd Apt 308condos321,720$1,150,000
738 Fernwood Rdsingle_family321,312$2,875,000
575 Crandon Blvd Apt 801condos332,450$2,100,000

10-year hold projection

IRR-4.3%
Equity multiple0.29x
Total return (10yr)-$173,842
YearProperty valueNOICash flowLoan balanceEquity
1$3,862,500$41,580-$199,516$2,967,473$895,027
2$3,978,375$43,517-$197,823$2,932,713$1,045,662
3$4,097,726$45,528-$196,061$2,895,566$1,202,161
4$4,220,658$47,618-$194,227$2,855,867$1,364,791
5$4,347,278$49,789-$192,319$2,813,443$1,533,835
6$4,477,696$52,043-$190,334$2,768,105$1,709,591
7$4,612,027$54,384-$188,269$2,719,654$1,892,373
8$4,750,388$56,815-$186,121$2,667,876$2,082,512
9$4,892,899$59,338-$183,887$2,612,542$2,280,358
10$5,039,686$61,958-$181,564$2,553,408$2,486,279
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.