Building facts
- Address
- 4100 Island Blvd.
- Neighborhood
- Aventura
- Year built
- 2013
- Floors
- 24
- Residences
- 67
- Status
- Completed
- Developer
- Martin Z. Margulies
- Pricing
- Starting at $1.7 Million
Key Takeaways
- Price per square foot rose from $690 to $954 through 2025 — about 38%, one of the strongest gains in this series.
- Median sale price has more than doubled, from $1,700,000 in 2023 to $3,537,500 so far in 2026.
- 67 residences at 4100 Island Boulevard, plus two commercial folios.
- It is a three-bedroom building — 60 of the 67, with six four-bedrooms and one six-bedroom.
- Median floorplate is 2,608 square feet, running 2,235 to 4,955. Nothing here is small.
- The 2026 median assessed value is $1,254,424.
4100 Island Boulevard, Miami, Florida | Neighborhood: Williams Island, Aventura
A small building inside a gated island
Counted against the Miami-Dade County Property Appraiser record on 17 August 2026, Bellini returns 69 folios: 67 residential homes and two commercial.
The mix is 60 three-bedrooms, six four-bedrooms and one six-bedroom, with heated area from 2,235 to 4,955 square feet and a median of 2,608. There is no small inventory — the floor is well above the median home in most Aventura buildings.
It sits inside Williams Island, the gated community in Aventura, alongside Bellamare. The two make an interesting pair: Bellamare’s homes are far larger (a 3,222 square foot median against 2,608) and carry a $1,587,860 median assessment against $1,254,424 here.
One of the strongest records measured
Qualified sales from the county record — arm’s-length only.
| Year | Qualified sales | Median price | Median $/sq ft |
|---|---|---|---|
| 2023 | 5 | $1,700,000 | $690 |
| 2024 | 4 | $2,102,500 | $852 |
| 2025 | 5 | $2,487,500 | $954 |
| 2026 to date | 2 | $3,537,500 | $880 |
Both columns rose together through 2025 — median price $1,700,000 to $2,487,500, per-foot pricing $690 to $954, about 38%. That is among the strongest three-year records of any building I have measured against this data.
The 2026 row shows a $3,537,500 median at a slightly lower $880 per square foot, which simply means the two homes that traded this year were larger. On a per-foot basis 2026 is broadly in line with 2025.
Volume has been steady at four to five qualified sales a year — modest in absolute terms, but consistent, which is what makes the trend readable in a 67-home building.
Who this suits
This suits a buyer who wants a large three-bedroom inside a gated island community, in a small association, with a demonstrated appreciation record behind it.
Compared with Bellamare next door, Bellini is the smaller-format, lower-entry option — but it has appreciated faster in percentage terms over the same period (38% against Bellamare’s 19%).
If you are selling here, the three-year record is a strong and specific argument. If you are buying, note that with roughly five sales a year, the right home appears infrequently.
Verified 17 August 2026 against the Miami-Dade County Property Appraiser record for 4100 Island Boulevard — all 69 folios retrieved individually, then filtered to homes, excluding parking, cabana and storage folios. Building age and storey count are omitted: published sources conflict and none has been confirmed. Re-check when the next tax roll publishes.
Bellini Williams Island — Frequently Asked Questions
How many units are in Bellini at Williams Island?
The Miami-Dade County Property Appraiser records 69 folios at 4100 Island Boulevard: 67 residential homes and two commercial. The mix is 60 three-bedrooms, six four-bedrooms and one six-bedroom.
Are values rising at Bellini?
Strongly. Price per square foot rose from $690 in 2023 to $954 in 2025, about 38%, and median sale price rose from $1,700,000 to $2,487,500 over the same period. Both measures moving together makes the trend credible.
What size are the residences?
Heated area runs from 2,235 to 4,955 square feet with a median of 2,608. There is no small inventory — the smallest home exceeds the median in many Aventura buildings.
How does Bellini compare with Bellamare?
Both sit inside Williams Island. Bellamare’s homes are considerably larger — a 3,222 square foot median against 2,608 — and carry a higher median assessment, $1,587,860 against $1,254,424. But Bellini has appreciated faster over the same three years, about 38% against 19%.
What do homes at Bellini sell for?
Two qualified sales so far in 2026 at a median of $3,537,500 and $880 per square foot, against $2,487,500 and $954 across five sales in 2025.
Is Bellini a good investment?
It has one of the stronger three-year records in this series, with steady volume of four to five sales a year. The constraint is size — with 67 homes, the right residence appears infrequently.
Sources and further reading
Interested in selling at Bellini Williams Island?
Learn more about selling condo at Bellini Williams Island with Josh Stein.
Related coverage
Part of Miami Luxury Condos.