Expert Engineers and Architects

We give our clients peace of mind when it comes to their property investments

Our History

ADU Garage Experts is a division of Peter Erdelyi & Associates, one of the top structural engineering firms in Southern California. We have been operating since 1978.

In 1974 Peter Erdelyi started working as a professional engineer in California. In 1978 he became one of the initial co-founders and owners of Erdelyi, Moon, Mezey and Associates, a partnership of structural engineers. Subsequently the name was changed to Erdelyi, Mezey and Associates and to its current form, Peter Erdelyi and Associate, in 1988. The company continued working out of its original location just south of Beverly Hills until its relocation to a new office building in December 2009.

Whether you’re upgrading an existing structure or building from the ground up, ADU Garage Experts has the expertise to oversee your project through completion.

We have designed more than 10,000 structures in the Los Angeles area over the past four decades; from apartment buildings to new single-family homes to additions and remodels both for residential and commercial clients. Our team of professional engineers, drafters, expeditors and project staff will deliver plans that withstand the test of time.

Our Work

Our Team Members

ADU Experts and its main division, Peter Erdelyi & Associates, Inc., service all of Southern California. 

Peter Erdelyi


Anita Dauenhauer

Office Manager

Ilona Razhavsky

Scheduling Manager & Accounts Receivable

Kathy Erdelyi

Plan Check Specialist

Steve Zador

Contract Specalist

Pamela Sankhar


Kamal Sadeghi

Design Engineer

Stephanie Sandoval

Design Engineer

Lynn Rjas Ramirez

Design Engineer

Alexander Fuentes

Design Engineer

Raul Hipolito


Akram Tawfic


Ben Robles


Rodgie Tiratira


Ildiko Babucsik