One of Southwest Florida's most extraordinary riverfront estates, 3836 Harold Avenue brings the romance of historic Palm Beach architecture to a private, gated setting in Old Fort Myers. Inspired by Addison Mizner's Mediterranean Revival style and designed inside and out by David Naylor, this one-of-a-kind residence pairs timeless artistry with reinforced-concrete construction, deep-water boating, and a Caloosahatchee River setting.Built in 2012, the home offers approximately 8,701 square feet o...One of Southwest Florida's most extraordinary riverfront estates, 3836 Harold Avenue brings the romance of historic Palm Beach architecture to a private, gated setting in Old Fort Myers. Inspired by Addison Mizner's Mediterranean Revival style and designed inside and out by David Naylor, this one-of-a-kind residence pairs timeless artistry with reinforced-concrete construction, deep-water boating, and a Caloosahatchee River setting.Built in 2012, the home offers approximately 8,701 square feet of air-conditioned living space, five bedrooms, five full baths, and three half baths. Enter through custom doors into a Spanish-inspired courtyard with covered walkways, balconies, and two working fountains adorned with handmade, hand-painted Mizner Industries tile. Beyond, a breathtaking great room rises approximately 30 feet beneath a Cypress ceiling and massive beams. An immense, independently engineered wall of impact-resistant glass frames the pool and river, filling the room with light and connecting it to the waterfront. Imported Italian limestone floors, a Francois & Co. limestone fireplace and custom kitchen range hood, hand-carved doors, intricate millwork, and artisan-crafted details give the home authenticity. The kitchen, family spaces and riverfront terraces flow beautifully for everyday living and grand entertaining. A private, approximately 1,500-square-foot first-floor owner's retreat includes separate dressing and bathing areas, a steam shower, fitness space, and direct garage access. Upstairs are multiple en-suite bedrooms, a private sitting area, a guest suite with its own exterior entrance, a river-view office with carved "Romeo and Juliet"? doors, and a richly paneled Irish pub and media room opening to a riverfront balcony. A second office is on the main level. The substance behind the beauty is equally compelling: poured reinforced-concrete structural walls extend through both levels, with pre-stressed concrete slabs forming the second floor. PGT impact-rated windows and doors, specialized engineering for the monumental glass enclosure, and spray-foam attic insulation reflect a residence conceived for strength, comfort, and longevity. Outdoors, covered Cypress-ceiling terraces, a full kitchen and bar, pool and spa overlook the river. A new custom dock with composite decking, two lift positions and direct Caloosahatchee access makes this a rare offering for serious boaters. An oversized four-car garage, integrated home automation, multi-zone audio, lighting and security complete the estate. Just off historic McGregor Boulevard, near downtown Fort Myers, the Edison and Ford Winter Estates and Donald Ross-designed Fort Myers Country Club, this property offers privacy near the city. Its scale is impressive; its warmth is unexpected. Its craftsmanship, engineering, waterfront setting, and singular design place 3836 Harold Avenue among the most distinctive estates in Southwest Florida.