Modern ADU Builder & Garage Conversions
We transform underutilized spaces into beautiful, functional Accessory Dwelling Units (ADUs) that add value, flexibility, and income potential to your property. We'll help you build the home extension of your dreams, whether it's a detached ADU or a converted garage. Our services cover all of Long Beach and surrounding communities. Trust that we can expertly handle every step of the project from designing the space, securing the permits, construction works, and adding the finishing touches. 
Long Beach love us because...
Choosing Modern ADU Builder & Garage Conversions means partnering with Long Beach’s most knowledgeable and reliable team for your ADU or garage conversion project. We bring unmatched local expertise backed by years of industry experience. All our projects comply with local building codes to avoid penalties and sanctions.
Our team handles every step of the process, from conceptualizing the design to the final inspection before move-in. You never have to juggle multiple contractors to complete ADUs and garage conversions. We deliver quality work, delivering only quality materials through skilled craftsmanship. We build beautiful living spaces that bring lasting value to your property. Our dedicated project manager will keep you updated of the project's progress, making the journey smooth, stress-free, and successful.
98%
Over the years, 98% of our clients have rated their experience with Modern ADU Builder & Garage Conversions as “excellent” or “very good” in post-project surveys.
150+
Successfully completed ADU and garage conversion projects throughout Long Beach and the surrounding areas. We're among the most-experienced builders in the region. 
100%
Our expert team has a 100% success rate in securing permits and city approvals for all ADU and garage conversion projects we’ve handled in the Long Beach area.
60%
A remarkable 60% of our new projects come from referrals by past clients who were thrilled with our craftsmanship, service, and results.
Our ADU & Garage Conversion Services
Detached ADU Construction
Create a fully independent living space in your backyard with our detached ADU solutions. Perfect for rentals, guesthouses, or multigenerational living, these units offer privacy and versatility while maximizing your property’s potential.
Attached ADU Construction
Expand your home seamlessly by adding an attached ADU to your existing structure. Our team designs and builds attached units that blend beautifully with your home’s architecture while providing extra living space for family or rental income.
Garage Conversion ADUs
Transform your unused garage into a comfortable and functional living area. We handle everything from insulation and utilities to finishes, turning your garage into a valuable asset for guests, tenants, or family.
Basement ADU Conversion
Unlock the full potential of your basement with an ADU conversion. We create bright and welcoming basement units that meet all the safety and code requirements of the city. This conversion is ideal for those looking to earn extra through Airbnb. 
Above-Garage ADUs
Maximize your property’s square footage by building an ADU above your existing garage. Our above-garage ADU designs are structurally sound while being aesthetically pleasing. We bring stylish solutions to give you an extra living space without sacrificing an inch of your yard. 
Junior ADU Construction
Make the most of your home’s existing footprint with a Junior ADU. This is an efficient, cost-effective solution that adds living space using part of your primary residence. It's ideal for extended families or as a small rental unit.
Is Your Property Eligible for an ADU or Garage Conversion in Long Beach, CA?
In Long Beach, most single-family and multi-family properties are eligible for an ADU or garage conversion. California has more relaxed zoning laws. There is no minimum or maximum lot size requirement. Detached ADUs can be up to 1,200 sq ft, while attached units are limited to 50% of the existing home’s size (max 1,200 sq ft).
Junior ADUs (JADUs) are capped at 500 sq ft. Setbacks for new detached ADUs are just 4 feet from rear and side property lines. Parking is not required if your property is within half a mile of public transit, located in a historic district, or if you’re converting an existing structure like a garage.
Long Beach allows one ADU and one JADU on single-family lots. Multi-family lots can add up to two detached ADUs and convert unused interior spaces into more units (up to 25% of the unit count). Owner occupancy is not required unless building a JADU. Long Beach has a streamlined ADU permit application process. You'll get an approval within 60 days.
What Are the Most Popular Uses for ADUs and Converted Garages?
Long-Term Rentals
ADUs and converted garages are in high demand as rental units, offering homeowners a steady source of additional income. With Long Beach’s vibrant rental market, these spaces can be leased to long-term tenants, helping offset mortgage costs.
We design units that appeal to renters with modern amenities and privacy. Our team also helps you understand landlord requirements and rental regulations.
Short-Term Rentals (Airbnb Units)
Many homeowners use ADUs as short-term rentals through platforms like Airbnb. These units are perfect for visitors seeking a home-like experience and can generate significant income during peak seasons.
We help you design attractive, low-maintenance spaces that stand out in the short-term rental market. Our team can also advise on local short-term rental ordinances and compliance.
Guesthouses
Hosting friends and family is easy with a dedicated guesthouse ADU. These units provide your visitors with privacy and comfort while keeping them close to home.
We can customize layouts to include kitchenettes, private bathrooms, and cozy living areas. Your guests will appreciate the thoughtful design and welcoming atmosphere.
Home Office
With remote work on the rise, many clients convert garages or build ADUs to serve as professional home offices. These quiet, separate spaces enhance productivity and work-life balance.
We incorporate features like soundproofing, high-speed internet, and ample natural light. Your new office will be a comfortable and inspiring place to work.
In-Law Suites
ADUs are a perfect solution for multigenerational living, allowing aging parents or adult children to stay close while maintaining independence. Our designs prioritize accessibility, safety, and comfort, ensuring a welcoming environment for all ages.
Features like no-step entries, wide doorways, and accessible bathrooms can be included. We work with you to create a space tailored to your family’s needs.
Art & Music Studio
Creative homeowners often use ADUs or converted garages as art or music studios. These spaces can be customized for soundproofing, lighting, and storage, providing a dedicated area for your passions.
Whether you’re a hobbyist or professional, your studio will be designed for inspiration and productivity. Enjoy the freedom to create without leaving home.
Private Gyms & Wellness Rooms
Transform your ADU or garage conversion into a personal fitness studio or wellness retreat. We can install rubber flooring, mirrors, and specialized equipment to suit your workout needs.
These private gyms offer convenience and privacy, making it easier to prioritize your health. Add a sauna or meditation space for the ultimate wellness experience.
Student or Nanny Suites
If you have college students or live-in caregivers, an ADU or converted garage can provide them with a comfortable, independent living space. These suites offer privacy while keeping loved ones close for support or supervision.
We design flexible layouts to accommodate study areas, sleeping quarters, and private bathrooms. Your new suite will enhance both comfort and functionality for your household.
How Do We Handle Permits, Zoning, and City Regulations for You?
Navigating Long Beach’s permitting process, zoning laws, and building codes can be overwhelming. At Modern ADU Builder & Garage Conversions, we offer a complete, end-to-end service that takes the stress out of compliance. Our team conducts thorough research on your property, prepares all necessary documentation, submits permit applications, and coordinates with city officials on your behalf. We stay up-to-date on the latest regulations and keep you informed throughout the process, ensuring your project moves forward smoothly and without costly delays.
ADU Builder & Garage Conversion FAQs
Do I need a large lot to build an ADU in Long Beach?
No. Long Beach does not have a minimum lot size requirement for ADUs. Most residential properties, including small lots, qualify as long as other zoning conditions like setbacks and height limits are met.
Can I convert my existing garage into an ADU?
Yes. Detached and attached garages can be converted into ADUs under current regulations. You must still meet building code standards, and in most cases, additional parking is not required if you're near public transit.
How big can my ADU be?
Detached ADUs can be up to 1,200 square feet. Attached ADUs are limited to 50% of the existing home’s living area, and JADUs (Junior ADUs) must be 500 square feet or less and located within the main house.
Do I need to live on the property to build an ADU?
Not necessarily. As of the latest California laws, owner occupancy is not required for standard ADUs. However, if you’re building a JADU, you must live on the property.
Will building an ADU affect my property taxes?
Yes. Adding an ADU will likely increase your property’s assessed value, but only the new construction portion will be reassessed—not your entire property. The tax increase is usually moderate compared to the rental income potential.
