ISO Commercial is a comprehensive commercial real estate firm serving the greater Austin area.



The partners of ISO Commercial have been key players in the transformation of the city’s central core, combining individual experience from a wide array of professional endeavors – development, tenant representation, landlord representation, multi-family and property management. We are proud to represent clients that embrace the entrepreneurial spirit that weaves the fabric that makes Austin special – from the developers that transform the Austin skyline to the small retailers and restaurateurs that fill the streets of town. With over 50 years of combined real estate experience we look forward to becoming your lifelong partner in all of your real estate endeavors.


Dave van Heuven

Dave van Heuven studied finance/real estate at the University of Texas at Austin for three years. He then changed majors and received a B.A. in the Urban Studies/Urban Planning program and a minor in Finance/Real Estate. He has called Austin home for over 20 years. He has witnessed firsthand the transformation of this wonderful city from a “sleepy college town” to a truly international city within the past two decades.

Dave serves on...


Tim Grondin

Known for providing creative solutions that improve every aspect of a client’s experience, Tim Grondin is a preeminent real estate expert in the greater Austin area. Tim has been a sought after trusted agent since 2007. He specializes in high-end commercial properties in downtown and central Austin, as well as the surrounding neighborhoods.

In a city that has grown exponentially over the past decade, real estate buyers and sellers need...


Karen Kelly

Karen Kelly has spent the last decade building her reputation as an industry expert, providing valuable resources and working tirelessly for her clients. She is respected for her experience, intelligence and extensive market knowledge, which make her a valuable asset for those seeking help in the Austin market.

Karen attributes her work ethic and passion for people to her small-town Texas roots and takes pride in her impressive...

James Wilson VHP 4 x 5 Headshot .png

James Wilson

James specializes in all facets of the real estate business and joined ISO Commercial in 2021 to specialize in tenant representation for the firm. He is originally from Alabama (War Eagle!) and has called the great state of Texas home since 2013. His background in property management not only brought him to Austin, but also led him to his career in Real Estate.

He is well-known for his positive personality and attention to detail. His...

Juan Carlos Headshot 2.jpg

Juan Carlos de Leon

Juan Carlos is a real estate agent and a Licensed Architect with a Bachelor of Architecture from the University of Houston. He has lived in Austin since 2009 and has experienced the city’s growth and evolution as one of the fastest growing cities in the country. He is very knowledgeable of the city’s culture, lifestyle, and real-estate trends.

Juan Carlos is also a practicing residential architect who works with private clients...