Hart Cottage: A 1959 Sarasota School Island Retreat on Keewaydin Island

Hart Cottage on Keewaydin Island, Florida, represents a distinctive example of the Sarasota School of Architecture—a regional modernist movement that emerged in Southwest Florida during the mid-20th century. Designed by architect Bert Brosmith and built in 1959, this small island cottage demonstrates how thoughtful design can create harmony between built structures and their natural surroundings.

Location and Access

Keewaydin Island sits just south of Naples, Florida, accessible only by boat. This isolation shaped the cottage’s design and construction—every material had to arrive by water, making the project logistically challenging but resulting in a structure deeply connected to its maritime setting.

Photo Credit: Marie Barnett

Design Features

Hart Cottage embodies the Sarasota School’s principles of responding to Florida’s subtropical climate:

• Cantilevered decks: Extended living space over the water
• Large sliding windows: Open to capture cross-breezes and blur the line between inside and outside
• Waterfront porch: Overlooks the waterway, creating a connection to the natural environment
• Compact footprint: Efficient use of space appropriate for island living

The Sarasota School of Architecture

The Sarasota School emerged in the 1940s and 1950s as architects adapted modernist principles to Florida’s climate and landscape. Key characteristics include:

• Climate responsiveness: Designs that work with heat, humidity, and tropical storms
• Indoor-outdoor living: Blurred boundaries through large openings and covered outdoor spaces
• Natural ventilation: Orientation and openings designed to capture prevailing breezes
• Integration with landscape: Buildings that complement rather than dominate their sites
• Honest materials: Exposed structural elements and natural finishes

Hart Cottage, though small, exemplifies these principles in a residential context.

Image from “The Sarasota School of Architecture” by John Howey

Lessons for Small-Space Design

Hart Cottage offers insights relevant to contemporary tiny house and small cottage design:

• Site determines design: The boat-only access influenced every material and design choice
• Outdoor space extends living area: Decks and porches multiply usable square footage
• Climate-appropriate design reduces systems: Natural ventilation minimizes mechanical cooling needs
• Small can be architecturally significant: Compact structures deserve the same design attention as large ones
• Context matters: A building’s relationship to its surroundings often matters more than its size

Hart Cottage stands as a reminder that small structures, thoughtfully designed for their specific location and climate, can achieve architectural distinction while providing comfortable, connected living spaces.

Photo Credits: Marie Barnett; “The Sarasota School of Architecture” by John Howey

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Alex

Alex Pino is the founder of Tiny House Talk, a leading resource on tiny homes and simple living since 2009. He helps readers discover unique homes, connect with builders, and explore alternative living.

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