1BR/1BA 28×28 L-Shape

650 Sq Ft ADU Plans: Spacious, Modern Design for a One-Bedroom Unit

Our 650 sq ft ADU plans offer a perfect balance between functionality and style. This one-bedroom, one-bath unit is designed with an open L-shaped layout, making it ideal for homeowners who want to add an efficient and versatile living space to their property. With large living areas, French doors, and an optional enlarged kitchen, this ADU is perfect for both daily living and entertaining guests.

L-Shaped Layout with a Functional Design

This 650 sqft floor plan features a thoughtfully designed L-shaped layout, which enhances the flow between living spaces while offering privacy in the bedroom area.

Key Features of the Layout:

• L-Shaped Design: The L-shaped layout breaks away from the conventional rectangular or square ADU structures. This makes the home feel less like a “box” and more like a cozy, welcoming house. From an exterior perspective, the L-shape adds dimension and depth, creating a more architecturally interesting and attractive façade. If you like an L-shape but want a little more room, check out our 36×25 L-shape one bedroom floor plan.
• U-Shaped Kitchen with Optional Peninsula: The kitchen is U-shaped, providing plenty of storage and workspace. You can add an optional 8′ peninsula for extra counter space and seating, perfect for entertaining.
• Spacious Living Room with French Doors: The living room opens to the outside through French doors, allowing natural light to brighten the space and offering easy access to outdoor areas.
• Accessible Bathroom: The bathroom is accessible from both the bedroom and living room, adding convenience for both residents and guests.
• In-Unit Laundry: A dedicated laundry area adds functionality, making this ADU a fully self-sufficient living space.

Size & Square Footage

With 650 sqft, this ADU size offers a comfortable amount of space for a one-bedroom home. The layout is designed to make the most of every square foot, creating a balance between open living spaces and private areas. This size is ideal for those who need a bit more room than a smaller ADU while maintaining an easy-to-maintain footprint.

Benefits of a 650 Sq Ft ADU:

• Fits Well in Smaller Yards: With a modest footprint, this unit can fit well in properties with limited outdoor space, while still providing ample living space.
• Rentability and Market Appeal: A 650 sq ft ADU is an attractive option for renters who are looking for affordable housing with all the amenities of a larger unit. The inclusion of a full kitchen, in-unit laundry, and ample storage increases its appeal, making it easy to rent out for additional income.
• Qualifies for Simplified Permitting: In many areas, ADUs under a certain square footage are subject to less stringent zoning and building requirements. At 650 sq ft, this ADU often qualifies for faster permitting and lower fees as a statewide exemption ADU.
• Flexible Design Options: The slightly larger size compared to smaller ADUs allows for greater customization, such as an expanded kitchen, added storage, or a larger bedroom. The option to include an 8′ peninsula in the kitchen enhances functionality without taking up too much space.

Cost to Build

Constructing a 650 sq ft ADU is a more affordable option compared to larger ADUs, such as a 1200 sq ft unit. On a simple lot, this size of ADU can be completed in the mid $300Ks, offering a cost-effective solution for homeowners looking to add extra living space without the hefty price tag of a larger build.

Key Cost Considerations

• More Affordable than Larger ADUs: A 650 sq ft ADU is less expensive to build than larger units, making it an attractive option for those on a budget.
• Efficient Use of Space and Resources: With fewer materials and a smaller labor requirement, this ADU can be built faster and more economically.
• Lower Permitting Fees: In many areas, smaller ADUs benefit from lower permitting fees, reducing the initial project costs even further.
• Waived Impact Fees: Impact fees are waived under 750 sq ft per California state ADU laws, providing additional savings.
• Lower Maintenance Costs: A smaller ADU means less upkeep in the long run. Homeowners will benefit from reduced maintenance tasks, fewer repairs, and lower utility bills due to the efficient size.

Best Use Cases for a 650 Sqft Floor Plan

A 650 sq ft ADU is not only versatile but also caters to a wide variety of needs. Whether you’re looking for extra income, a private guest house, or a family residence, this ADU’s layout and size can accommodate your specific lifestyle. Its flexibility and efficient use of space make it suitable for multiple scenarios.

Top Use Cases

• Rental Unit: Looking to generate rental income? This ADU offers all the amenities of a full-sized home in a smaller, more efficient footprint. Renters will love the spacious living area, well-equipped kitchen, and the added luxury of French doors opening to outdoor space. Plus, the in-unit laundry makes it even more attractive for long-term tenants.
• Entertainment & Guest House: With its open living area and optional expanded kitchen, this floor plan is perfect for entertaining guests. The French doors create an indoor-outdoor flow, and the large bedroom and walk-in closet ensure visitors have plenty of room to feel at home.
• Multi-Generational Living: Offering a private and independent space, this 650 sq ft ADU is a great solution for aging parents, in-laws, or adult children who want to live nearby. The accessible bathroom, laundry, and kitchen make day-to-day living easy while ensuring privacy from the main home. Read more about multigenerational living.
• Home Office or Creative Studio: The versatile layout also makes it an ideal candidate for a home office or a creative studio.

Customizable Options for Your 650 Sq Ft ADU

Our ADU plans are fully customizable to meet your unique needs. You can personalize the layout, interior finishes, and exterior finishes to suit your lifestyle. Whether you want to enlarge the kitchen with the optional peninsula or adjust storage solutions, we offer flexible design options to create the perfect ADU for you.