- (541) 850-6300
- April 27, 2026
ADU Garage Experts
Description
ADU Garage Experts is a Southern California-based ADU planning and structural engineering company specializing in accessory dwelling units, garage conversions, and residential property expansion projects. Operating as a division of Peter Erdelyi & Associates, one of Southern California’s long-standing structural engineering firms, the company combines decades of engineering expertise with specialized ADU-focused design and planning services.
Founded to address the growing demand for accessory dwelling units across California, ADU Garage Experts helps homeowners and property investors maximize the value and functionality of their existing properties through professionally designed ADU solutions.
Structural Engineering & ADU Expertise
ADU Garage Experts focuses on delivering structurally sound, code-compliant ADU plans designed to meet both homeowner goals and California building requirements. Their team includes:
- Structural engineers
- Drafters
- Designers
- Permit expeditors
- Project coordinators
The company’s engineering background allows them to handle projects ranging from straightforward garage conversions to larger residential and commercial structural developments. Over the years, the broader engineering division has contributed to the design of thousands of structures throughout the Los Angeles area.
Types of ADUs They Specialize In
ADU Garage Experts works across multiple ADU categories depending on the property layout and homeowner objectives.
Garage Conversion ADUs
As garage conversion specialists, they transform underutilized garages into fully functional living spaces designed for:
- Rental income units
- Guest houses
- Home offices
- Artist studios
- Assisted living spaces
- Multigenerational housing
Attached ADUs
Attached accessory dwelling units are integrated into the existing primary residence while maintaining separate entrances and independent living functionality.
Detached ADUs
Detached ADUs are standalone structures built separately from the primary residence, commonly used as:
- Backyard cottages
- Granny flats
- In-law suites
- Rental units
- Private guest accommodations
Their ADU Planning Process
ADU Garage Experts emphasizes a streamlined and organized project workflow designed to simplify the often-complex ADU development process in California.
Their Process Includes:
- Architectural planning and design
- Structural engineering
- Permit coordination and expediting
- Code compliance guidance
- Construction coordination
- Contractor collaboration
The company also helps homeowners navigate local zoning regulations and California ADU laws, which can vary significantly between jurisdictions.
Why Homeowners Build ADUs
According to ADU Garage Experts, homeowners pursue ADU projects for a variety of practical and financial reasons, including:
- Creating rental income opportunities
- Increasing property value
- Expanding living space
- Housing family members
- Developing home office or studio space
- Supporting aging parents or assisted living needs
The company highlights the growing importance of ADUs as a housing solution in Southern California’s competitive real estate market.
Experience & Company Background
ADU Garage Experts operates under the larger structural engineering firm founded by Peter Erdelyi, whose engineering experience in California dates back to the 1970s. The company has worked on:
- Residential remodels
- Home additions
- Apartment buildings
- Commercial projects
- Single-family homes
- Structural upgrades
This engineering-first approach distinguishes ADU Garage Experts from contractors focused solely on construction, particularly for projects requiring complex structural planning or permitting support.
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