Modern Cottage Style Casita | Santa Ana

A modern small house with white walls and a dark hipped roof, featuring a large arched window, a small front door, and landscaped yard with plants and flowers.
Backyard scene featuring a small modern building with gray panels and a arched window reflection, surrounded by green lawn, shrubs, flowers, and tall trees, with a wooden fence in the background.
Modern living room with large arched window showing a backyard garden, featuring a gray sofa, two round ottomans, a marble coffee table with a chessboard, a TV on a wooden stand, white and beige pillows, greenery and outdoor furniture visible through the window, and a kitchen counter with a flower arrangement.

The Santa Ana casita and ADU model offers 795 sq ft of finished space, designed to create a comfortable and efficient backyard living environment. This two-bedroom, one-bathroom layout features an open-concept living area that connects the kitchen, dining, and living spaces, creating a bright and functional interior. A large arched window adds architectural character while allowing natural light to fill the main living area, all within a 20' × 40'8" footprint.

Estimated construction for the Santa Ana casita / ADU typically starts in the $220s, depending on site conditions, finishes, engineering requirements, and customization. Final pricing and specifications may vary from the original plan.

The Santa Ana casita was designed by the Advanced House Plans firm.

A cozy bedroom with a large bed, multiple pillows, and a throw blanket, next to a window with curtains and a glass door leading outside to a garden view.
Floor plan of a house with two bedrooms, a kitchen, a living room, a dining area, a bathroom, and utility areas. Bedrooms labeled Br.1 and Br.2, kitchen marked as K., major rooms include Great Room and Dinette, with closets, laundry, and mechanical room included.