# 646 William Street, Key West, FL 33040 > **TL;DR:** 3bd/2ba multi-family, $1,400,000 ($787/sqft), built 1928, 1,780 sqft. > View, A/C. Est. $7,487/mo. Listed 10 days. ## Property at a Glance | Attribute | Value | |-----------|-------| | Price | $1,400,000 | | Price/sqft | $787 | | Bedrooms | 3 | | Bathrooms | 2 full | | Square Feet | 1,780 | | Year Built | 1928 | | Lot Size | 3,920 sqft (0.09 acres) | | Property Type | Multi-Family (Duplex) | | Status | Active | | Days on Market | 10 | ## Why This Home Stands Out - **Views** - Water ## Estimated Monthly Costs | Category | Amount | |----------|--------| | Principal & Interest (20% down, 30-year at 6.5%) | $7,079 | | Estimated Insurance | $408 | | **Total** | **$7,487** | ## Key Amenities - View - A/C ## Property Highlights - Built in 1928 - 0.09 acre lot ## Description ### Agent Description 644 William Street The property being sold is 644 William Street. The current property record/card reflects both 644 and 646 William Street, although the property being conveyed is 644 William Street. The structure at 644 William Street is a two-and-a-half-story home currently configured as a duplex and is in need of renovation. The first floor consists of two bedrooms and two bathrooms. The second floor contains two bedrooms and one bathroom. A stairwell provides access to the third floor, which is currently unfinished and is not completed or configured as living space. In its current condition, the property contains four bedrooms and three bathrooms of finished living area, with additional unfinished space on the third floor. The property is currently being used/configured as a duplex and will require renovation. ## Location - **Address:** 646 William Street, Key West, FL 33040 - **County:** Monroe - **Neighborhood:** Old Town - Unlisted (1.0) - **Coordinates:** 24.555613, -81.79759 - **Google Maps:** https://www.google.com/maps?q=24.555613,-81.79759 ## Listing Agent - **Name:** Louis M Paez - **Brokerage:** Coldwell Banker Schmitt Real Estate Co. (KW) - **Phone:** 3053951081 - **Broker Phone:** (305) 296-7727 - **Listing URL:** [View original listing](https://www.realtor.com/realestateandhomes-detail/646-William-St_Key-West_FL_33040_M67146-74038?f=listhub&s=KWARFL&m=621406&c=propsimple) ## Photos ![646 William Street - Photo 1](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f2967702751r.jpg) ![646 William Street - Photo 2](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f1749315128r.jpg) ![646 William Street - Photo 3](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f620157254r.jpg) ![646 William Street - Photo 4](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f1527154474r.jpg) ![646 William Street - Photo 5](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f3990362513r.jpg) ![646 William Street - Photo 6](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f86517269r.jpg) ![646 William Street - Photo 7](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f4224456724r.jpg) ![646 William Street - Photo 8](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f2953775489r.jpg) ![646 William Street - Photo 9](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f2761318901r.jpg) ![646 William Street - Photo 10](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f3500405444r.jpg) ![646 William Street - Photo 11](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f3959237955r.jpg) ![646 William Street - Photo 12](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f2944732137r.jpg) ![646 William Street - Photo 13](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f3547280738r.jpg) ![646 William Street - Photo 14](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f778295777r.jpg) ![646 William Street - Photo 15](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f1711622336r.jpg) ![646 William Street - Photo 16](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f697492569r.jpg) ![646 William Street - Photo 17](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f288846071r.jpg) ![646 William Street - Photo 18](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f935124887r.jpg) ![646 William Street - Photo 19](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f3533972662r.jpg) ![646 William Street - Photo 20](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f2925281228r.jpg) ![646 William Street - Photo 21](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f2824475460r.jpg) ![646 William Street - Photo 22](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f2659724165r.jpg) ![646 William Street - Photo 23](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f3846696804r.jpg) ![646 William Street - Photo 24](http://lh.rdcpix.com/c53bcce34550cf4aedd7a96f5251547dl-f3723903139r.jpg) --- **MLS#:** 621406 | **Updated:** 2026-09-25 **Source:** listhub *Copyright © 2026 Key West Association of Realtors. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.* [View on PropertySimple](https://www.propertysimple.ai/listing/646-william-street-key-west-fl-33040-l621406) --- ## Structured Data ```json { "@context": "https://schema.org", "@type": "RealEstateListing", "@id": "https://www.propertysimple.ai/listing/646-william-street-key-west-fl-33040-l621406#listing", "url": "https://www.propertysimple.ai/listing/646-william-street-key-west-fl-33040-l621406", "name": "646 William Street, Key West, FL 33040", "description": "644 William Street The property being sold is 644 William Street. The current property record/card reflects both 644 and 646 William Street, although the property being conveyed is 644 William Street. The structure at 644 William Street is a two-and-a-half-story home currently configured as a duplex and is in need of renovation. The first floor consists of two bedrooms and two bathrooms. The second floor contains two bedrooms and one bathroom. A stairwell provides access to the third floor, which is currently unfinished and is not completed or configured as living space. In its current condition, the property contains four bedrooms and three bathrooms of finished living area, with additional unfinished space on the third floor. 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