Tammy Siegl

Real Estate Development Specialist

Office: Middleton, WI

Focus: Assisting Developers with technical and administrative support for a variety of real estate activities from due diligence and feasibility all the way through the closing process.  In addition,  Tammy oversees the operations of the Madison office.

Experience: Tammy earned her Bachelor’s degree from the University of Wisconsin-Madison in Political Science. Before joining Commonwealth Development Corporation, Tammy was with Mirus Partners, Inc. since its formation in 2013.  She assisted with property acquisitions, coordinated preparation of financing proposals, and oversaw the office operations.  Prior to the formation of Mirus Partners, Tammy worked for Silverstone Partners, a related party, since 2010 in a similar role.

Impressive Facts: Tammy is a World Class Drum and Bugle Corps alumni and tries to attend as many corps shows during the summer that she can.  She has been known to get her flag & rifle out on occasion and practice spinning in the backyard.

Fun Stuff: Tammy and her husband spend quite a bit of time attending UW-Madison sporting events as both of their kids attend the UW, where her daughter is also a cheerleader.  She enjoys the outdoors, traveling and spending time with friends.

Commonwealth is creating opportunities through affordable housing to help people be successful in their communities.


Dunbar Commons Named A Finalist for ULI-Oklahoma’s Impact Award

What an honor to have our Dunbar Commons senior apartment community selected as a finalist for Urban Land Institute (ULI)
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Solid Rock & Commonwealth Unveil Housing Plan

On January 24th, Solid Rock Christian Center, Community Development Corp. and Commonwealth Development presented the idea of bringing…
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Commonwealth was quick to respond to any need, both large and small, throughout the entire building process. It might sound too good to be true, but all we did was tell them what we wanted and they did it. Very simple and no surprises. It is easy to see why Commonwealth is a rapidly growing company.

Brian Lenz, President , Lenz Sales & Service, Inc.