Miami Luxury Condos · Casa del Mar Key Biscayne
The county records 235 homes at 881 Ocean Drive.
By Josh Stein · Florida license SL3057661 · Updated 12 October 2026Leer en español →
7 condos for sale at Casa del Mar Key Biscayne, average list price $1,223.56 per sq ft (total list price ÷ total sq ft).
- Asking range$1,495,000 to $3,750,000
- List price per sq ft$1,223.56
- Months of inventory21.0
- Sold, 12 months4
Listing information is deemed reliable but is not guaranteed and is provided exclusively for consumers' personal, non-commercial use. Data is supplied by the MLS and may be subject to change or withdrawal without notice.
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Key facts about Casa del Mar Key Biscayne
| Address | 881 Ocean Drive, Key Biscayne FL 33149 |
|---|---|
| For sale now | 7 |
| For rent now | 6 |
| List price range | $1,495,000 to $3,750,000 |
| Size | 1,042 to 3,120 sq ft |
| Bedrooms | 2 to 3 BR |
| List price per sq ft | Average $1,223.56, low $1,122, high $1,435 |
| Monthly HOA | $947 to $2,425 |
| Year built | 1971 |
| Amenities | Basketball Court, Bike Storage, Car Wash Area, Clubhouse, Elevators, Fitness Center, Library, Maintenance Grounds, Management, Picnic Area, Playground, Pool, Sauna, Tennis Courts, Trash |
| Neighborhood | Key Biscayne |
Residences at Casa del Mar Key Biscayne
| Bedrooms | For sale | Size (sq ft) | List price | Avg $/sq ft | Last sale |
|---|---|---|---|---|---|
| 1 | 0 | $690,000 (June 4, 2025) | |||
| 2 | 4 | 1,042 to 1,875 | $1,495,000 to $2,470,000 | $1,314.68 | $2,450,000 (July 6, 2026) |
| 3 or more | 3 | 3,120 | $3,500,000 to $3,750,000 | $1,158.65 | $2,220,000 (September 4, 2026) |
Recently sold in
4 listings
Casa del Mar, at 881 Ocean Drive, Key Biscayne, holds 235 homes on the Miami-Dade property roll, built 1971. 5 sales were recorded in the 12 months to 24 September 2026, at a median of $1,975,000, or $1,053 per square foot. Across qualified sales since 2023 the median is $1,000 per square foot.
Verified against public recordsMiami-Dade County Property Appraiser, Josh Stein Realtor4 sources
Key Takeaways
- Casa del Mar recorded 5 sales in the 12 months to 24 September 2026 — at a median of $1,975,000, or $1,053 per square foot, on the Miami-Dade County Property Appraiser record. The latest recorded sale was on 26 June 2026. Own at Casa del Mar? Ask Josh what yours would sell for on WhatsApp.
- The county records 235 homes at 881 Ocean Drive, built 1971, under the declaration CASA DEL MAR CONDO. The same record holds 1 other folio that is not a home (1 reference folio for the common elements).
- Home sizes run 930 to 4,995 square feet, median 1,875. The roll records 5 one-bedroom, 178 two-bedroom, 50 three-bedroom, 1 four-bedroom and 1 five-bedroom.
- 27 qualified sales since January 2023 have a median of $1,825,000, or $1,000 per square foot — about one home in 32 changing hands per year.
- 6.0% of recorded resales sold for less than the previous recorded price — 26 of 435 resale pairs on the qualified-sale record, with a median change of +66.7% over a median hold of 8.3 years.
- The highest qualified sale on record is $3,500,000, on 10 June 2024, for a 3,120 square-foot home.
- Address 881 Ocean Drive, Key Biscayne
- Year built 1971 (county record)
- Homes 235 (Miami-Dade County)
- Home sizes 930–4,995 sq ft (median 1,875)
- 2026 assessed value median $1,319,544
- County declaration CASA DEL MAR CONDO
What the county record shows
Casa del Mar is at 881 Ocean Drive, Key Biscayne. The Miami-Dade Property Appraiser lists 235 homes under the declaration CASA DEL MAR CONDO, with a built year of 1971 on all but 1 home folio.
Have a question about Casa del Mar? This page is built from the county record, not a listing feed. If you want what has actually closed here, or an honest read on whether it suits you, ask me directly.
The pull holds 236 folios in all. The ones not counted as homes are 1 reference folio for the common elements. They are real property with their own assessments, but they are not residences, so every figure on this page leaves them out.
Home sizes run from 930 to 4,995 square feet, with a median of 1,875. The roll records 5 one-bedroom, 178 two-bedroom, 50 three-bedroom, 1 four-bedroom and 1 five-bedroom. The median 2026 assessed value is $1,319,544; an assessment is set for tax purposes and is not a market price.
What have homes sold for since 2023?
Qualified arm’s-length sales only. Transfers the county flags as disqualified are excluded, a deed that covers several homes is not counted as one sale, and 2026 is a part year.
| Year | Qualified sales | Median price | Median $/sq ft |
|---|---|---|---|
| 2023 | 10 | $1,587,500 | $917 |
| 2024 | 5 | $1,900,000 | $1,013 |
| 2025 | 10 | $1,635,000 | $1,013 |
| 2026 | 2 | $2,180,000 | $1,163 |
Pooled across all 27 qualified sales since January 2023, the median is $1,825,000, or $1,000 per square foot. With 235 homes, that is about one home in 32 changing hands per year. Median price moves with the mix of floorplans that sold in a given year, so the per-foot column is the better like-for-like guide.
How owners did when they resold
A resale pair is the same home recorded as a qualified sale twice. The county record holds 435 such pairs at Casa del Mar. In 26 of them (6.0%) the later price was lower than the earlier one. Across all pairs the median change was +66.7%, over a median hold of 8.3 years. These are recorded prices only: they leave out closing costs, improvements, assessments and carrying costs, so a small recorded gain can still be a loss in cash.
The highest recorded sale
The highest qualified sale on the record is $3,500,000, on 10 June 2024, for a 3,120 square-foot home, or $1,122 per square foot.
Other Key Biscayne buildings on the same record
The same 12-month measure, taken the same way from the county record, for other buildings this site covers. Each number is the one on that building’s own page.
| Building | Sales, 12 months | Median price | Median $/sq ft |
|---|---|---|---|
| Casa del Mar | 5 | $1,975,000 | $1,053 |
| Oceana Key Biscayne | 5 | $5,150,000 | $2,701 |
| Grand Bay Residences | 3 | $3,500,000 | $1,006 |
Each building’s 12 months run to the date its county record was retrieved (23 September 2026, 24 September 2026), so the windows differ by days, not months.
See also Commodore Club East, Oceana Key Biscayne and Grand Bay Residences, and the full Key Biscayne guide.
What to check before you sign
- Confirm the folio, not just the unit number. Ask for the folio and read its own sale history and assessment on the Property Appraiser’s site.
- Ask the association for its milestone inspection status and its reserve study. Both can change what an owner pays after closing.
- Check any comparable you are shown against the county record. A deed that covered more than one unit, or a combined residence, can make a price per foot look far higher or lower than the building really trades.
- Ask what the monthly maintenance covers and whether any special assessment is approved or proposed. Get it in writing from the association.
Verified 29 September 2026 against the Miami-Dade County Property Appraiser record for CASA DEL MAR CONDO (236 folios retrieved 24 September 2026, 235 counted as homes). Sale figures are qualified arm’s-length transfers, with deeds covering several homes removed. Amenities, story count, architect and developer are not stated here because no primary source was checked for them. Re-check when the next tax roll publishes.
Own at Casa del Mar?
If you own here, this page already carries the county’s record of what homes in Casa del Mar have sold for. Here is how to use it.
Your three options
- Sell. Price against what comparable homes in the building have actually recorded, not against asking prices.
- Rent it out. Within the condominium’s rental rules, which vary from building to building.
- Hold. Watch the record: this page is updated from the county as new sales are posted.
What I will send you
Tell me your unit. I will send you the recorded sales of comparable homes in Casa del Mar, what they sold for per square foot, and a straight read on what yours could sell for today.
Two free things for owners
How this building compares: the Miami Condo Index ranks buildings by price per square foot and four-year change from the county record, the Miami Resale Record shows how often resales closed below the seller’s price, and the 100 Latest Sales list shows MLS closings as they post. Every building we cover is on the Miami Luxury Condos page.
Casa del Mar — Frequently Asked Questions
What have homes at Casa del Mar sold for in the last 12 months?
5 sales were recorded on the Miami-Dade County Property Appraiser record in the 12 months to 24 September 2026, at a median of $1,975,000 ($1,053 per square foot). The latest recorded sale was on 26 June 2026. These are recorded closings, not asking prices. If you own at Casa del Mar and want to know what your home would sell for, message Josh Stein on WhatsApp at (305) 695-8257.
How many homes are at Casa del Mar?
The Miami-Dade County Property Appraiser records 235 homes at 881 Ocean Drive, Key Biscayne, under the declaration CASA DEL MAR CONDO, retrieved 24 September 2026. The same record holds 1 other folio that is not a home, and it is not counted.
When was Casa del Mar built?
The county record gives 1971 as the year built for all but 1 home folio.
What is the price per square foot at Casa del Mar?
Across 27 qualified sales recorded since January 2023, the median is $1,000 per square foot, on a median sale of $1,825,000. By year: 2023, $917 (10 sales); 2024, $1,013 (5 sales); 2025, $1,013 (10 sales); 2026, $1,163 (2 sales). 2026 is a part year.
Do owners at Casa del Mar lose money when they sell?
On the county record, of 435 resale pairs on the county’s qualified-sale record, 26 (6.0%) sold for less than the previous recorded price. The median change was +66.7% over a median hold of 8.3 years, before closing and carrying costs.
What is the highest price paid at Casa del Mar?
The highest qualified sale on the county record is $3,500,000, on 10 June 2024, for a 3,120 square-foot home.
Sources and further reading
- Miami-Dade County Property Appraiser — property search and tax roll (236 folio records for CASA DEL MAR CONDO, retrieved 24 September 2026)miamidadepa.gov
- Miami-Dade County Property Appraiser — official sitemiamidadepa.gov
- Josh Stein Realtor — Key Biscayne guidejoshsteinrealtor.com
- Josh Stein Realtor — Miami luxury condominiumsjoshsteinrealtor.com
Thinking about Casa del Mar?
I have sold South Florida property since 2002, more than $1 billion of it. Ask me for the recorded declaration, what has genuinely closed, or a straight answer on whether this building fits what you are after.
Josh Stein · Florida real estate sales associate, license SL3057661 · (305) 695-8257 · hello@joshsteinrealtor.comRelated coverage
Part of Miami Luxury Condos.