# 521 United Street, Key West, FL 33040 > **TL;DR:** commercial, $20,350,000 ($4250/sqft), built 1938, 4,788 sqft. > View. Est. $108,836/mo. Listed 788 days. ## Property at a Glance | Attribute | Value | |-----------|-------| | Price | $20,350,000 | | Price/sqft | $4250 | | Square Feet | 4,788 | | Year Built | 1938 | | Lot Size | 21,780 sqft (0.50 acres) | | Stories | 3 | | Property Type | Commercial (Other) | | Status | Active | | Days on Market | 788 | ## Why This Home Stands Out - **Views** - Water ## Estimated Monthly Costs | Category | Amount | |----------|--------| | Principal & Interest (20% down, 30-year at 6.5%) | $102,901 | | Estimated Insurance | $5,935 | | **Total** | **$108,836** | ## Key Amenities - View ## Property Highlights - Built in 1938 - 0.50 acre lot - 3 stories ## Description ### Agent Description Located at 521 United Street, the Southernmost Inn was originally built in the 1800s as a Francisco Marrero cigar factory. With much of the old cigar factory features restored, the award-winning transformation allowed the old Key West designs to live on throughout a modern-day establishment. The Southernmost Inn offers 38 newly renovated rooms featuring modern interiors with a classic neo-colonial design. All guestrooms feature en-suite bathrooms, flat screen TVs, and colonial wooden blinds. The Boutique also boasts a gorgeous outdoor common area with lush gardens, two pools, one jacuzzi, a bar (currently closed), and a relaxing dining area. ## Location - **Address:** 521 United Street, Key West, FL 33040 - **County:** Monroe - **Neighborhood:** Old Town - Unrecord (1.0) - **Coordinates:** 24.548987, -81.796508 - **Google Maps:** https://www.google.com/maps?q=24.548987,-81.796508 ## Listing Agent - **Name:** Team Gardner/Langley - **Brokerage:** Berkshire Hathaway Keys Real Estate | Knight & Gardner Realty - **Broker Phone:** (305) 294-5155 ## Photos ![521 United Street - Photo 1](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f3012905718r.jpg) ![521 United Street - Photo 2](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f2408442508r.jpg) ![521 United Street - Photo 3](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f2339844807r.jpg) ![521 United Street - Photo 4](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f110333682r.jpg) ![521 United Street - Photo 5](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f3158397868r.jpg) ![521 United Street - Photo 6](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f2660173203r.jpg) ![521 United Street - Photo 7](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f4073844267r.jpg) ![521 United Street - Photo 8](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f1425950055r.jpg) ![521 United Street - Photo 9](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f2718752598r.jpg) ![521 United Street - Photo 10](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f1210975583r.jpg) ![521 United Street - Photo 11](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f2528717492r.jpg) ![521 United Street - Photo 12](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f3285382622r.jpg) ![521 United Street - Photo 13](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f218295406r.jpg) ![521 United Street - Photo 14](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f4285772937r.jpg) ![521 United Street - Photo 15](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f3584438937r.jpg) ![521 United Street - Photo 16](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f3494691779r.jpg) ![521 United Street - Photo 17](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f3801521478r.jpg) ![521 United Street - Photo 18](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f3374791843r.jpg) ![521 United Street - Photo 19](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f284741747r.jpg) ![521 United Street - Photo 20](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f1678262746r.jpg) ![521 United Street - Photo 21](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f2902863016r.jpg) ![521 United Street - Photo 22](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f3352538701r.jpg) ![521 United Street - Photo 23](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f1006536499r.jpg) ![521 United Street - Photo 24](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f3632467234r.jpg) ![521 United Street - Photo 25](http://lh.rdcpix.com/f5e97eeb9dcf7feb42fda2bb700ac94al-f164226705r.jpg) --- **MLS#:** 611311 | **Updated:** 2026-10-20 **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/521-united-street-key-west-fl-33040-4a68d0ff11da4ba5a9c817a2ae998eeb) --- ## Structured Data ```json { "@context": "https://schema.org", "@type": "RealEstateListing", "@id": "https://www.propertysimple.ai/listing/521-united-street-key-west-fl-33040-4a68d0ff11da4ba5a9c817a2ae998eeb#listing", "url": "https://www.propertysimple.ai/listing/521-united-street-key-west-fl-33040-4a68d0ff11da4ba5a9c817a2ae998eeb", "name": "521 United Street, Key West, FL 33040", "description": "Located at 521 United Street, the Southernmost Inn was originally built in the 1800s as a Francisco Marrero cigar factory. With much of the old cigar factory features restored, the award-winning transformation allowed the old Key West designs to live on throughout a modern-day establishment. 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