Explore the Best ADU Floor Plans: 1-2 Bedroom Designs and More

Accessory dwelling unit floor plans have become a hot topic for homeowners in San Diego and beyond. An accessory dwelling unit (ADU) is a small, self-contained home that shares the same lot as a primary residence. They come in different types, from detached units to garage apartments and basement conversions.

So, why should you consider ADU floor plans? Here are some compelling reasons:

  • Rental Income: An ADU can provide a steady stream of rental income, helping offset mortgage payments.
  • Flexibility: Great for multigenerational living, these units offer flexibility for aging parents, adult children, or even live-in caregivers.
  • Property Value: Adding an ADU can significantly boost your property’s value.

Types of ADUs:

  1. Detached ADUs: Stand-alone units separate from the main house. Ideal for privacy.
  2. Attached ADUs: Units attached to the main residence, often offering more seamless access.
  3. Internal ADUs: Created within existing spaces like basements or attics.
  4. Garage ADUs: Changing garages into livable units.
  5. Basement ADUs: Utilizing basement space for a functional new dwelling.

I’m Michael Kootchick, a seasoned real estate developer with experience in designing and managing accessory dwelling unit floor plans. Having worked in both Southern California and Austin, I bring a wealth of knowledge to every ADU project.

Next, let’s dig deeper into the top five ADU floor plans to find which design might suit you best.

Infographic summarizing the reasons and types of ADUs - accessory dwelling unit floor plans infographic pillar-5-steps

Top 5 ADU Floor Plans

Exploring the right accessory dwelling unit floor plan can be a game-changer for your property. Here are the top five ADU floor plans to consider:

1. Detached ADU

Detached ADUs, also known as backyard cottages or granny flats, are standalone units built on the same lot as the main house. These units offer complete independence from the primary residence, making them ideal for rental income or housing family members.

Benefits:
Privacy: Provides an independent living space.
Flexibility: Can be rented out for additional income.
High Value: Often increases property value significantly.

2. Attached ADU

An attached ADU is connected to the main house but has its own entrance and living facilities. This type of ADU is perfect for those who want to keep family members close but still maintain some level of separation.

Benefits:
Convenience: Easy access to the main house.
Cost-effective: Generally cheaper to build than detached units.
Versatile Use: Can serve as a home office, guest room, or rental unit.

3. Internal ADU

Internal ADUs are created by converting existing spaces within the main house, such as attics or basements, into separate living units. These are often the most cost-effective ADUs to build.

Benefits:
Affordable: Lower construction costs since they use existing space.
Quick to Build: Faster to complete compared to new builds.
Efficient Use of Space: Maximizes the use of underused areas.

4. Garage ADU

A garage ADU converts an existing garage into a livable space. This type of ADU is also cost-effective and quick to build, making it a popular choice for homeowners.

Benefits:
Cost-Efficient: Lower construction costs.
Quick to Build: Faster to complete compared to new builds.
Versatile Use: Can serve as a rental unit or guest house.

5. Basement ADU

Basement ADUs turn underused basement space into a functional living area. These are also known as mother-in-law suites or secondary suites.

Benefits:
Maximizes Space: Uses existing square footage.
Affordable: Lower cost than building a new structure.
Convenient: Easy access to utilities.

Each of these ADU floor plans offers unique benefits, making it easier to find the perfect fit for your needs. Whether you’re looking to generate rental income, provide housing for family members, or simply increase your property value, there’s an ADU design that’s right for you.

1-Bedroom ADU Floor Plans

One-bedroom accessory dwelling unit floor plans offer a perfect blend of efficiency, privacy, and cost-effectiveness. These compact units are designed to maximize space while providing all the necessary amenities for comfortable living.

Small Space Efficiency

One-bedroom ADUs are masterfully designed to make the most out of limited space. For instance, OneStop ADU’s 1-bedroom floorplan includes a sliding door, a spacious walk-in closet, a full-size kitchen with a dishwasher, and a stackable washer/dryer. This thoughtful layout ensures that every square foot is used effectively, making the unit feel more spacious than its actual size.

Efficient 1-Bedroom Layout - accessory dwelling unit floor plans

Privacy

Despite their compact size, 1-bedroom ADUs offer significant privacy. These units are self-contained, meaning they have separate entrances, kitchens, and bathrooms. This makes them an excellent choice for:

  • Multigenerational living: Aging parents can live independently while staying close to family.
  • Guest accommodations: Provide a comfortable and private space for visiting friends or relatives.
  • Rental units: Renters can enjoy their own private space without intruding on the main household.

Cost-Effective

Pros:
Lower construction costs: Smaller size means less material and labor.
High ROI: Potential for significant rental income.
Tax benefits: Expenses related to building and maintaining the ADU can be deducted if used as a rental property.

Each of these factors makes 1-bedroom ADUs a smart, economical choice for homeowners looking to add value and functionality to their property.

2-Bedroom ADU Floor Plans

Family-Friendly

2-bedroom ADU floor plans are perfect for families. They provide enough space for parents and children or even two roommates. The extra room can be used as a child’s bedroom, guest room, or even a small home office. This flexibility makes them ideal for various family setups.

A real-life example: OneStop ADU’s largest 2-bedroom, 2-bathroom floor plan includes a spacious master bedroom with a walk-in closet and an en-suite bathroom. This design ensures both privacy and comfort for everyone living in the unit.

Extra Space

Having two bedrooms means more room for everyone. This extra space can be a game-changer for homeowners who need more than just a single room. Whether it’s for storage, a hobby room, or a quiet study area, the second bedroom provides that additional square footage that can make life much easier.

For instance, OneStop ADU’s 2-bedroom design features a full-size kitchen with an island, accent lighting, and a dishwasher, making it easy to prepare meals and entertain guests. The inclusion of a stackable washer/dryer also adds convenience, saving trips to the laundromat.

Versatility

The versatility of a 2-bedroom ADU is one of its biggest selling points. These units can serve multiple purposes, from housing family members to generating rental income. They can also be transformed into specialized spaces like a home gym, art studio, or dedicated workspace, offering endless possibilities.

Imagine converting one of the bedrooms into a cozy home office. With remote work becoming more common, this setup can provide a quiet and productive environment separate from the main house. Alternatively, the second bedroom could be rented out, offering a steady income stream.

Conclusion

2-bedroom ADU floor plans offer a blend of family-friendly features, extra space, and versatility. They are an excellent choice for homeowners looking to maximize the functionality and value of their property.

Modern ADU Floor Plans

Modern accessory dwelling unit floor plans are all about blending style with functionality. Let’s explore what makes these designs stand out.

Contemporary Design

Modern ADUs often feature contemporary design elements. Think clean lines, large windows, and open spaces. These designs not only look sleek but also make the most of limited square footage.

Example: Imagine a modern ADU with floor-to-ceiling windows that flood the space with natural light. This design creates an airy, open feel, making the unit seem larger than it actually is.

Energy Efficiency

Energy efficiency is a big deal in modern ADU designs. Many homeowners want to reduce their carbon footprint and save on utility bills.

Tip: Look for ADU plans that include solar panels, energy-efficient windows, and smart thermostats. These features can significantly reduce energy costs over time.

Open Floor Plans

Open floor plans are a hallmark of modern ADU designs. They eliminate unnecessary walls, creating a more spacious and flexible living area.

Case Study: OneStop ADU’s studio ADU showcases an open plan with a sliding door, walk-in closet, and a full-size kitchen. This layout maximizes space and functionality, making it ideal for small lots.

Benefit: Open floor plans also allow for easy customization. Whether you want a cozy living room or a functional workspace, these layouts offer the flexibility to adapt to your needs.

Modern ADUs combine contemporary design, energy efficiency, and open floor plans to create stylish and practical living spaces. These features not only improve the aesthetic appeal but also improve the functionality and sustainability of the units.

 

Conclusion

At OneStop ADU, we specialize in creating the perfect accessory dwelling unit floor plans custom to your needs. Our comprehensive services ensure that every step of the ADU construction process is seamless and efficient.

From the initial feasibility study to the final touches, our team handles everything. We evaluate zoning and building codes, process all necessary permits, and work closely with city officials to ensure all regulations are met. This meticulous approach not only saves you time but also reduces the overall cost of construction.

In San Diego, progressive policies have made it easier for homeowners to add ADUs to their properties. The elimination of owner occupancy requirements and the easing of parking regulations have opened up new opportunities for real estate investment and increased the availability of affordable housing.

Choosing OneStop ADU means you’ll have a dedicated partner guiding you through every step of the process. Whether you’re looking to generate extra income, provide housing for a loved one, or simply increase your property’s value, we’re here to help you achieve your goals.

For more information about our services and to schedule a complimentary feasibility study of your property, visit our San Diego ADU page. Let’s make your ADU dream a reality!

 

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