Accessory dwelling units (ADUs) are no longer just backyard add-ons—they’re stylish, smart and solving housing challenges.
“ADU represents what’s possible when creativity meets functionality in a small footprint,” says Jon Grishpul, the co-founder of MaxableSpace.com, a leading ADU provider.
With a greater focus on the design of an ADU, Maxable offers its picks for some of the most innovative styles of ADUs. In its annual contest, Maxable named it the “Best ADU of the Year Competition” for 2025, celebrating innovation in tiny home design nationwide.
America’s Best ADU of the Year
Ashby ADU, Piedmont, Calif.
Designer: Tuan Le DesigN
Builder: Atelier19AD6
Size: 800 sq. ft., 2 bed, 1 bath
Highlights: Built on a steep slope, this modern ADU features skylights and floor-to-ceiling, four-panel sliding glass doors that flood the interior with natural light.
Other ‘Best ADU’ Standouts For 2025
Alora ADU, San Diego
Designer: Ruland Design Group
Builder: Glann Fick, Coastline Construction
Size: 1,000 sq ft, 2 bed, 2 bath duplex
Highlights: Two attached backyard homes—one for an aging mother, the other for rental income. Features high ceilings, clerestory windows, large sliding glass doors and seamless indoor-outdoor living.
Copperline ADU, San Diego
Designer and Builder: SnapADU
Size: 980 sq ft, 2 bed, 2 bath
Highlights: Spanish-style design matches the main home with tile roof, hand-textured stucco, arched porch openings and copper gutters. Private space for family and guests.
Longview ADU, Washington, D.C.
Designer: Ileana Schinder
Builder: J Cabido Designs
Highlights: Converted an abandoned garage into a one-bedroom ADU. Features energy-saving technologies like an energy recovery ventilator and efficient mini-splits.
Brushstroke ADU, Newcastle, Calif.
Designer and Builder: A+ Construction ADU Builders
Size: 1,198 sq ft + 800 sq ft deck, 3 bed, 2 baths
Highlights: Provides independent living for parents. Includes a large open living area, aging-in-place features and a covered 800-square-foot deck.
