Howell Key — An Off-Grid Private Island in the Florida Keys

A $16.9M private island in the Florida Keys, and the whole thing runs off-grid. 🏝️ ⚡

Howell Key is 9.69 acres of tropical landscape with open water on every side, sunrise to sunset. The 3,352-square-foot main residence sits at the center under cathedral ceilings, with walls of impact-rated glass and elegant coastal interiors. A separate guest wing, reached by a breezeway, has its own living room, breakfast bar, and two private bedrooms. Groomed trails, a sandy beach, a saltwater pool, a pickleball court, a barn, and a pasture fill out the rest of the island.

The ultimate flex? The island comes with everything needed to run it. Solar power, whole-house reverse osmosis filtration, SIP construction, Hardie Board siding, a standing seam metal roof, and impact windows and doors throughout, all sitting roughly 10 feet above base flood elevation. The sale includes a barge, a golf cart, a tractor, and a private mainland lot for car storage. Two building rights allow for one additional residence.

The Specs:

📍 0 Howell Key, Summerland Key, FL 33042
💰 $16,900,000
📐 3,352 Sq. Ft. | 9.69-Acre Private Island
🛏️ 5 Beds | 🛁 4 Baths
☀️ Fully Off-Grid: Solar, Reverse Osmosis & SIP Construction
🏝️ Sandy Beach, Saltwater Pool, Pickleball Court & Barn
🚤 Includes Barge, Golf Cart, Tractor & Mainland Car Storage