Verified against public recordsMiami-Dade County Property Appraiser, Josh Stein Realtor4 sources
4000 Island Boulevard, Williams Island — photography to follow
Key Takeaways
- The county records 180 residential folios at 4000 Island Boulevard, built 1985. A further 22 folios in this declaration are deeded parking, storage or cabanas classified under the same residential code — they are not homes and are excluded here.
- Pooled qualified sales since 2023 run at $820,000, or $397 per square foot — rank 4 of the seven Island Boulevard towers.
- Unit sizes run 660 to 5,313 square feet, median 2,120. The roll records 18 one-bedroom, 96 two-bedroom, 54 three-bedroom, 10 four-bedroom and 1 five-bedroom.
- 35 qualified sales in four years across 180 homes — about one home in 21 changing hands per year.
- The highest qualified sale on record is $2,675,000, 21 February 2023.
- Per-foot prices across the community span 2.3× — $316 at 1000 Island Boulevard to $740 at 2600 — inside one gated development.
- Address 4000 Island Boulevard, Williams Island, Aventura
- Year built 1985
- Residential folios 180 (Miami-Dade County)
- Non-dwelling folios excluded 22 (20 PS, 1 REFERENCE FOLIO, 1 COMM)
- Unit sizes 660–5,313 sq ft (median 2,120)
- 2026 assessed value $145,427–$2,018,175 (median $509,786)
- County subdivision 4000 IS BLVD WILLIAMS IS CONDO
What the county record shows
4000 Island Boulevard is the oldest tower on Williams Island — completed in 1985 — and it trades at the same price per foot as a building three years newer.
Have a question about 4000 Island Boulevard, Williams Island? This page is built from the county record and the trade press, not a listing feed. If you want what has actually closed here, or an honest read on whether it suits you, ask me directly.
Call (305) 695-8257Email about 4000 Island Boulevard, Williams Island
The Miami-Dade Property Appraiser lists 180 residential folios under the subdivision 4000 IS BLVD WILLIAMS IS CONDO, built 1985. The declaration also carries 22 folios that are not homes (20 PS, 1 REFERENCE FOLIO, 1 COMM). Miami-Dade classifies deeded parking and storage under the same residential code as a residence, so a count taken straight from the roll overstates this building by that amount.
The oldest building on the island, priced like a newer one
4000 was completed in 1985, the earliest of the seven towers. Pooled since 2023 it trades at $397 per square foot — within a dollar of 3000 Island Boulevard ($397), completed 1988–1989, and comfortably above 1000 Island Boulevard ($316), completed 1990.
Age is therefore not ordering this market. A buyer told that an older Williams Island tower is automatically the cheaper entry should check that claim against the roll, because on these numbers the oldest building is mid-ladder, not bottom.
Where this tower sits on the island
Seven Island Boulevard towers, all inside the same gated community, priced on the same basis — pooled qualified sales since 2023, per square foot. The spread is 2.3×.
| Tower | Homes | Median sale | Per sq ft |
|---|---|---|---|
| 1000 | 319 | $450,000 | $316 |
| 2000 | 274 | $642,500 | $374 |
| 3000 | 181 | $860,000 | $397 |
| 4000 | 180 | $820,000 | $397 |
| 2800 | 159 | $1,250,000 | $488 |
| 7000 | 298 | $1,217,500 | $506 |
| 2600 | 172 | $2,075,000 | $740 |
Across all seven, the county roll records 1,583 homes once deeded parking, storage and cabanas are removed.
Recent qualified sales
Qualified arm’s-length sales only. Transfers the county flags as disqualified are excluded, and 2026 is a part year.
| Year | Qualified sales | Median price | Median $/sq ft |
|---|---|---|---|
| 2023 | 8 | $685,000 | $456 |
| 2024 | 9 | $825,000 | $392 |
| 2025 | 12 | $976,000 | $460 |
| 2026 | 6 | $768,000 | $332 |
Read these with the sample size in view. 35 qualified sales in four years is a thin record, and a single large transaction moves a yearly median. The four-year pooled figure of $397 per foot is the more stable number.
What to check before you sign
- Confirm the folio, not the unit number. Ask for the folio and read its own sale history and assessment. Building averages hide a 8.1× range in home size here.
- Ask whether parking and storage are deeded separately. In this community they frequently are — 183 folios across the seven towers — which means they carry their own assessment and may or may not convey.
- Ask the association for the milestone inspection status and the reserve study. These are 1985 buildings in Miami-Dade and fall inside the county’s recertification programme.
- Check whether any comparable you are shown was a multi-parcel deed. A single sale covering two combined residences will look like a record per-foot price if it is divided against one folio.
Frequently asked questions
When was 4000 Island Boulevard built?
1985, making it the oldest of the seven Island Boulevard towers covered here. Despite that it trades at $397 per square foot pooled since 2023, above 1000 Island Boulevard and level with 3000.
How many homes are at 4000 Island Boulevard?
The county roll records 180 residential folios, built 1985. A further 22 folios in the same declaration are deeded parking, storage or cabanas classified under the same residential code; they are not homes.
What have homes at 4000 Island Boulevard sold for recently?
Pooled across qualified sales since 2023 the median is $820,000, or $397 per square foot. By year the median per foot runs $456 in 2023, $392 in 2024, $460 in 2025, $332 in 2026. There were 35 qualified sales in four years, so treat single-year figures cautiously.
Is 4000 Island Boulevard a good value compared with the rest of Williams Island?
On price per square foot it ranks 4 of the seven Island Boulevard towers, at $397 against a community range of $316 to $740. That is a measurement, not a recommendation — the towers differ in age, home size and floorplan mix, and the right comparison is always the specific floorplan you are being shown.
Sources and further reading
Thinking about 4000 Island Boulevard, Williams Island?
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.
Call (305) 695-8257Send me a question
Josh Stein · Florida real estate sales associate, license SL3057661 · (305) 695-8257 · hello@joshsteinrealtor.com
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