Howell Key, a privately owned, off-the-grid island off Summerland Key, is back on the market after a hefty haircut, resurfacing with a $5 million price cut that drops the asking price to $16.9 million. The nearly 10-acre island sits about a mile offshore near the 25-mile marker and is accessible only by boat or helicopter. On the island, a five-bedroom, four-bath main house anchors a compound that also includes a guest house, saltwater pool, helipad and a lineup of resort-style amenities.
According to Creative Loafing Tampa, the refreshed listing, which went live the week of June 26, confirms the new $16.9 million ask and notes that the marketing photos are credited to Zillow. Zillow's page also documents the price history, including the previous $21.9 million run earlier in 2024.
What's on the island
The property was built out as an off-grid retreat, with solar power, substantial freshwater storage and infrastructure geared toward long-term self-sufficiency. Mansion Global describes the main residence as a panel-built structure with wings and breezeways that lean into outdoor living. The compound offers dockage for boats up to about 50 feet, a helipad, guest house, garage, saltwater pool, tiki-hut beach setup, pickleball court and animal pens.
Size, build and records
Public listing data puts the lot at roughly 9.7 acres, and records show the main house was completed in 2012. Realtor.com carries the core property details, while Zillow's archived entry preserves the 2024 asking history, including the earlier $21.9 million list price.
Why the cut matters
A $5 million markdown on a one-of-a-kind private island is a noticeable move at the top of the Keys market, where demand for ultra-rare trophy properties can swing more than the broader housing scene. Coverage of the region notes that the Keys remain expensive overall even as luxury sellers probe the limits of what buyers will pay and adjust pricing when the response is lukewarm. Recent commentary also points to affordability strains and uneven performance in Monroe County's higher-end segment, as outlined by Florida Keys Market Update.
Listing and next steps
The current listing identifies Lisa H. Ferringo of Coldwell Banker Schmitt as the agent of record, according to local reporting, and the marketing photos remain viewable through Zillow. For more on Ferringo's background and other upper-tier Keys listings in her portfolio, visit the Lisa Ferringo Group site.
