MLS-supplied photographs · 61 selected
$3,730,000
5 beds · 4 baths · 2,700 sq ft
0.19 acre lot · MLS reported
524 Warren Lane, Key Biscayne, FL 33149
TROPICAL ISLE HOMES SUB 1 · Key Biscayne
Active
Why RET noticed it
RET View
This home is not currently RET Select.
The catch
It is a 1950 house, and the cheaper alternative remains available. Confirm room configuration and condition; no independent rental unit or income is assumed.
Compare with another property ↗
What could change our view
If the room arrangement does not provide useful separation in person, or repairs consume the benefit of choosing this older house, reconsider the premium.
Property details are based on listing/provider information and should be confirmed during normal buyer due diligence.
Source checked 2026-10-27T06:22:05ZHow RET evaluates properties
The listing facts come from the MLS; RET has not inspected the home. RET compares similar home types, sizes and waterfront settings. Check condition, measurements and any seller credits directly. Asking prices show what sellers want; completed sales show what buyers paid. RET Select also requires a clear reason to choose the home and a current review of its risks. This is not an appraisal or an offer recommendation.
Read the selection standard ↗How It Compares
This home asks about 3.44% less per square foot than the middle price of the similar recent sales. Its asking price is $1,381 per square foot, compared with $1,431 across 5 reviewed listing-reported sales from 2026-01-27 to 2026-08-24. Price per square foot divides the price by indoor living area; it helps compare homes of different sizes.
Comparison confidence: Moderate. Some homes differ in neighborhood, age, size or sale date. Condition, renovation and seller credits have not been priced into the difference. This is not an appraisal.
| MLS reference | Sale / date | $/sq.ft. | Indoor area / lot | Waterfront | Days listed / distance | How the homes differ |
|---|---|---|---|---|---|---|
| A11875259VERIFIEDTROPICAL ISLE HOMES SUB 1 | $3,000,0002026-04-20 | $1,014 | 2,958 sq.ft. / 0.19 acres | No | 126 days / 0.16 mi | Same house type, same waterfront category; 0.16 miles away; indoor area differs 9.6%; built 1951. Same listed subdivision.Year built 1951; Existing homeSold for less by $730,000; larger by 258 sq.ft. |
| A11857280VERIFIEDBISCAYNE KEY ESTATES | $3,125,0002026-03-09 | $1,287 | 2,429 sq.ft. / 0.17 acres | NoNone | 161 days / 0.2 mi | Same house type, same waterfront category; 0.20 miles away; indoor area differs 10.0%; built 1951. Different subdivision: check whether the locations are comparable.Year built 1951; Updated/RemodeledSold for less by $605,000; smaller by 271 sq.ft. |
| A11652379VERIFIEDBISCAYNE KEY ESTATES | $3,475,0002026-01-27 | $1,498 | 2,320 sq.ft. / 0.17 acres | No | 468 days / 0.19 mi | Same house type, same waterfront category; 0.19 miles away; indoor area differs 14.1%; built 1950. Different subdivision: check whether the locations are comparable.Year built 1950; Existing homeSold for less by $255,000; smaller by 380 sq.ft. |
| A12015581VERIFIEDTROPICAL ISLE HOMES SUB 4 | $3,100,0002026-08-24 | $1,499 | 2,068 sq.ft. / 0.17 acres | No | 96 days / 0.31 mi | Same house type, same waterfront category; 0.31 miles away; indoor area differs 23.4%; built 1953. Different subdivision: check whether the locations are comparable.Year built 1953; Existing homeSold for less by $630,000; smaller by 632 sq.ft. |
| A11991746VERIFIEDHOLIDAY COLONY | $4,700,0002026-07-27 | $1,431 | 3,285 sq.ft. / 0.28 acres | NoNone | 45 days / 0.52 mi | Same house type, same waterfront category; 0.52 miles away; indoor area differs 21.7%; built 1953. Different subdivision: check whether the locations are comparable.Year built 1953; Existing homeSold for more by $970,000; larger by 585 sq.ft. |
Nearby Homes for Sale
| MLS reference | Asking price | $/sq.ft. | Indoor area / lot | Waterfront | Days listed / distance | How the homes differ |
|---|---|---|---|---|---|---|
| A12091153TROPICAL ISLE HOMES SUB 1 | $4,500,000 | $1,673 | 2,689 sq.ft. / 0.18 acres | No | 40 days / 0.19 mi | Same house type, same waterfront category; 0.19 miles away; indoor area differs 0.4%; built 1951. Same listed subdivision.Year built 1951; Existing homeAsks more by $770,000; smaller by 11 sq.ft. |
| A12076783MASHTA ISLAND A REPLAT OF | $6,350,000 | $2,300 | 2,761 sq.ft. / 0.23 acres | No | 64 days / 0.56 mi | Same house type, same waterfront category; 0.56 miles away; indoor area differs 2.3%; built 1964. Different subdivision: check whether the locations are comparable.Year built 1964; condition not verifiedAsks more by $2,620,000; larger by 61 sq.ft. |
| A12085575BISCAYNE KEY ESTATES | $5,600,000 | $1,752 | 3,197 sq.ft. / 0.2 acres | No | 49 days / 0.3 mi | Same house type, same waterfront category; 0.30 miles away; indoor area differs 18.4%; built 1951. Different subdivision: check whether the locations are comparable.Year built 1951; Updated/RemodeledAsks more by $1,870,000; larger by 497 sq.ft. |
| A12002746TROPICAL ISLE HOMES SUB 4 | $3,550,000 | $1,631 | 2,177 sq.ft. / 0.18 acres | No | 176 days / 0.38 mi | Same house type, same waterfront category; 0.38 miles away; indoor area differs 19.4%; built 1953. Different subdivision: check whether the locations are comparable.Year built 1953; Existing home, Updated/RemodeledAsks less by $180,000; smaller by 523 sq.ft. |
What would justify choosing this home?
Of the 4 similar homes currently for sale, 1 has a lower asking price. Check what this home offers that the cheaper choices do not: condition, layout or lower ongoing costs. Compare the 2700 sq ft layout and 0.19-acre lot directly before choosing it.
What Changed
- Original asking price: $3,850,000. Current asking price: $3,730,000. Total price cut from the original ask: 3.12%.
- Time on market: 200 days on this listing; 200 days in the recorded cumulative history.
- Individual price cuts recorded in the available history: 0. The history may be incomplete, so there may have been other changes.
- The lower asking price reduces the purchase cost. It does not prove seller motivation or a discount to market value.
- Back-on-market, pending and relisting events: Requires verification.
Worth Knowing
- The 2700 sq.ft. living area is attributed to an unspecified source. Confirm the measurement and whether the space is legally permitted.
- This listing has been on the market for 200 days (200 days across its recorded history). Ask about showing feedback and any failed contracts; the listing data does not explain why it remains available.
- MLS construction year 1950. Check renovation permits, roof age and maintenance records.
- Get an insurance quote and flood-risk check for MLS A11999112: Requires verification.
What It Costs to Own
- Recorded 2025 property tax: $22,265. Your tax after purchase may differ from this past bill.
- Listed association fee: Not verified Not verified.
- Additional association fee: Requires verification.
- The MLS says the fee covers: .
- Confirm club charges, extra assessments, insurance and other ongoing costs. An assessment is an extra charge to owners, often for shared building work.
The Local Comparison
Among similar homes in this comparison, 2 sold in the last 180 days and 4 are currently for sale. The middle sale took 70.5 days on market and sold for $1,465 per square foot.
Which homes are included?
Matching rules: same city/subtype, 3-mile radius, living area ±25%, matching waterfront, age ±20 years, lot 0.5–2x, bedrooms ±1. Source cycle: 2026-10-26T16:17:11Z. Only permitted, complete records that match these rules are included. This is a sample, not every home in the neighborhood or a prediction of how fast this one will sell.
Why Some Homes Are Not Compared
Why other records were excluded
- Living area differs by over 25%: 60 records
- Nonstandard sale conditions require manual verification: 1 records
- Bedroom mismatch or unknown: 3 records
- Age difference over 20 years or unknown: 2 records
- Waterfront mismatch or unknown: 2 records
Showing the last validated intelligence. A refresh is overdue; source verification dates remain unchanged.
Put this property in context
See the property. Understand the decision.
Request a Showing Request a Private Review ↗ Call RET · 954-274-6948Listing provided by Serhant. Source: BeachesMLS, Inc. Originating MLS: MIAMI REALTORS® MLS.
Participant contact: 646-480-7665
For personal, non-commercial use when identifying a property to purchase. BeachesMLS, Inc. supplies listings bearing its logo. Authenticity and accuracy have not been verified; information is not guaranteed. Copyright © 2026 BeachesMLS, Inc.