Concrete Slab Leveling for Garage Conversion


Transform your garage into a comfortable, functional living space with professional concrete slab leveling for garage conversion from Modern ADU Builder & Garage Conversions. As Long Beach's premier conversion specialists, we understand that a level foundation is critical to the success of your project and the longevity of your investment.


Our dedicated team specializes in concrete slab leveling for garage conversion projects, addressing the unique challenges that come with repurposing existing structures. Many garage floors were originally constructed with slight slopes for drainage or have settled unevenly over time, creating obstacles for residential conversions that require flat, stable surfaces.


Using state-of-the-art equipment and proven techniques, our concrete slab leveling for garage conversion service corrects issues ranging from minor unevenness to significant settling problems. 


The concrete slab leveling for garage conversion process we employ minimizes disruption to your property while creating the perfect foundation for your new living space. Our methods effectively address existing cracks, moisture issues, and structural concerns to prevent future problems after your conversion is complete.


By choosing Modern ADU Builder & Garage Conversions for your concrete slab leveling for garage conversion project, you're partnering with Long Beach experts who understand local building codes and permit requirements.

Benefits of Professional Slab Leveling

Proper slab leveling ensures stability, comfort, and value for your garage conversion. Addressing uneven concrete directly affects safety, daily use, and long-term investment in your property.

Enhanced Structural Safety

We focus on correcting slab settlement to prevent structural risks like cracks, uneven support, and water intrusion. An unlevel slab can cause doors and windows to stick or frame misalignment, which may lead to costly repairs down the line.


Using professional techniques such as polyurethane foam injection, we lift and stabilize the slab efficiently. This minimizes the chance of future movement and maintains the integrity of your garage conversion foundation.

Improved Comfort

A level concrete slab creates a more usable floor that supports any subsequent finishes, from tile to hardwood. Uneven floors can cause discomfort, especially if the garage is being transformed into a living area or workspace.



We eliminate sloped or cracked surfaces, making the environment safer and more practical. Proper leveling supports appliances, furniture, and fixtures firmly without wobbling or tilting.

Increased Property Value

A professionally leveled slab contributes to better resale value by demonstrating quality workmanship. Potential buyers recognize that an even foundation supports the entire structure and lowers the risk of foundational problems.



We help ensure that your garage conversion meets local building codes, which can be a decisive factor in appraisals and inspections. An uneven slab could flag issues during home evaluations and reduce offers.

Our Leveling Process

We follow a structured method to ensure your garage floor is stable and level for conversion. Every step is designed to address specific issues and guarantee lasting results.

  • 1. Initial Assessment

    We begin with a detailed on-site inspection to identify uneven areas, cracks, or signs of settling. Measuring slab elevations with laser levels allows us to determine the degree of unevenness precisely.


    During the consultation, we discuss your garage conversion plans to understand load requirements and any design considerations. This helps us tailor our leveling approach to fit your specific needs.


    We also review soil conditions and drainage factors. This initial analysis informs which leveling method will be safest and most effective for your property.


  • 2. Leveling with Advanced Equipment

    We use polyurethane foam injection and mudjacking as the primary leveling methods, selecting the best option based on the slab condition. Polyurethane foam expands under the slab, raising and stabilizing it securely.


    Our equipment includes high-precision injection tools that allow us to control the amount and placement of leveling material with minimal disruption. This ensures a smooth surface without damaging the existing concrete.


    We closely monitor rising slab sections during the process to avoid over-lifting. Quick curing materials enable us to complete the work efficiently, reducing downtime.


  • 3. Quality Assurance

    After leveling, we conduct a final laser survey to confirm all areas meet the required flatness and elevation standards. Any minor adjustments are made immediately.


    We inspect for cracks or weak spots that may need repair before finishing. Our team checks that the slab can support the weight and use planned for the converted garage space.


    To ensure longevity, we document the process and provide recommendations for ongoing maintenance or preventive measures. This thorough quality control guarantees a stable foundation for your project.


Why Partner with Us

Experienced Team

We bring years of experience in concrete slab leveling specifically for garage conversions. Our team understands the unique challenges of Long Beach homes and applies proven techniques to ensure a stable, even foundation.

Customer-Focused

We prioritize clear communication and flexibility to meet your specific needs. Our goal is to complete the job efficiently while maintaining high standards and respecting your property.

Premium Materials 

We use high-grade materials and industry-standard equipment to deliver reliable results. This approach minimizes future settling and structural issues, providing a durable base for your conversion project.

FAQs on Concrete Slab Leveling for Garage Conversion


We understand that concrete slab leveling is a critical step in converting your garage into a functional living space. The process involves specific assessment and adjustment techniques to ensure a stable, even foundation.

  • Do I need concrete slab leveling for my garage conversion in Long Beach?

    Most garage conversions in Long Beach require concrete slab leveling to meet California Residential Code requirements. If your garage floor has uneven areas exceeding 1/8" per 10 feet, visible slopes, pooling water, cracks wider than 1/4", or doors that don't close properly, leveling is necessary. A professional assessment during initial planning will determine your specific needs.

  • How much does concrete slab leveling cost for a garage conversion?

    Concrete slab leveling for a standard 2-car garage conversion in Long Beach typically costs between $2,000-$5,000. Simple leveling projects using self-leveling compounds start around $2,000-$3,000, while complex jobs requiring mudjacking or foam injection range from $3,500-$5,000. Extensive repairs involving replacement sections can exceed $6,000, depending on garage size and unevenness severity.


  • What problems can uneven concrete slabs cause in garage conversions?

    Uneven concrete slabs in garage conversions cause flooring installation problems, difficulty installing level fixtures and cabinets, door and window misalignment, tripping hazards, poor drainage leading to moisture issues, potential code violations, reduced property value, and long-term structural problems as the building settles. Addressing these issues early prevents costly repairs later.

  • How long does concrete slab leveling take during a garage conversion?

    The concrete slab leveling process typically takes 2-5 days within your conversion timeline. Assessment and preparation requires 1 day, application of leveling materials takes 1-2 days, and curing time before further construction needs 1-2 days. Most methods allow light foot traffic within 24 hours, but full curing takes about 72 hours before installing finishing materials.


  • Can existing cracks in my garage floor be fixed during slab leveling?

    Yes, existing cracks should be fixed during slab leveling. Small hairline cracks are filled with epoxy or polyurethane injections creating a waterproof seal. Larger cracks require cutting out and patching with new concrete or specialized repair compounds. Addressing these cracks creates a stable, moisture-resistant foundation for your new living space and prevents future problems.