William Street, Key West, FL
Everything we know about William Street in Key West: what is for sale, what has sold, what the homes are like and which communities the street runs through — from the MLS record and county parcel data, refreshed nightly.
47 homes sit on William Street in Key West, FL (ZIP 33040), built 1840–2007, a typical 1,852 sq ft with 3 bedrooms. 1 is for sale right now from $1,400,000. Homes that sold since 2023 went for a median $2,392,500.
For sale on William Street now
The homes on William Street
39 single-family, 8 condo/townhome/other. Built by decade: 1840s 2, 1860s 1, 1880s 1, 1890s 4, 1900s 4, 1910s 1, 1920s 12, 1930s 17, 1940s 1, 1950s 2, 1970s 1, 2000s 1.
Last recorded sales (parcel record)
| Address | Sold | Date | Built | Sq ft |
|---|---|---|---|---|
| 418 William Street | $3,285,000 | 2026-03-18 | 1928 | 1,852 |
| 708 William Street | $1,752,000 | 2025-11-17 | 1943 | 1,967 |
| 628 William Street | $2,595,000 | 2025-11-13 | 1928 | 1,524 |
| 312 William Street | $1,650,000 | 2025-10-30 | 1901 | 1,376 |
| 710 William Street | $1,325,000 | 2025-06-10 | 1933 | 1,120 |
| 329 William Street | $3,600,000 | 2024-12-31 | 1892 | 2,294 |
| 528 William Street | $3,550,000 | 2024-06-12 | 1933 | 2,648 |
| 1318 William Street | $1,250,000 | 2024-01-31 | 1958 | 899 |
| 626 William Street | $6,500,000 | 2023-09-01 | 1938 | 3,536 |
| 327 William Street | $2,190,000 | 2023-02-13 | 1933 | 1,676 |
| 315 William Street | $1,700,000 | 2022-08-11 | 1929 | 2,500 |
| 405 William Street | $2,700,000 | 2022-05-17 | 1939 | 2,054 |
| 513 William Street | $6,950,000 | 2022-03-29 | 1845 | 4,373 |
| 409 William Street | $3,400,000 | 2021-07-23 | 1908 | 3,226 |
| 326 William Street | $1,400,000 | 2021-07-15 | 1950 | 1,649 |
| 520 William Street | $1,450,000 | 2021-03-24 | 1890 | 1,388 |
| 414 William Street | $1,825,000 | 2021-03-10 | 1938 | 2,050 |
| 421 William Street | $2,450,000 | 2021-02-24 | 1929 | 3,392 |
| 313 William Street | $3,750,000 | 2021-02-17 | 1900 | 2,993 |
| 316 William Street | $1,200,000 | 2021-01-29 | 1860 | 1,436 |
How to read this
Home counts, build years, sizes and last sales come from the county parcel record joined to MLS history; listings and 12-month closings from the live MLS feeds as of October 14, 2026. Listings appear courtesy of the listing brokerage under IDX rules; information deemed reliable but not guaranteed. See also all 228 homes for sale in Key West, homes for sale in 33040.