About Us

Get to know Cornerstone Development of S.E. WI., LLC

Wisconsin Condominium and Single-Family Home Communities

At Cornerstone Development we pride ourselves on Building Exceptional Lifestyles… Every Day!

Headquartered in Sussex, Wisconsin, Cornerstone Development is the preeminent developer and builder of ranch-style Wisconsin condominium communities as well as beautiful single-family home offerings. We also build our homes on properties already owned by our home buyers.

Cornerstone Development has been honored with numerous awards including the 2020 Guildmaster Award for Customer Service and Excellence, a distinction we’ve earned for the second straight year.

Founder John Wahlen began building single-story condominiums in the Milwaukee area in 2005, responding to the demographic and cultural changes transforming our society,

Our Wisconsin condominium developers offer ranch-style condo floor plans varying in designs, and construction features but with one major distinction in common: low-maintenance, hassle free living in locations near every convenience our buyers want and deserve.

Cornerstone Development’s team utilizes over 25 years of engineering, construction, sales and development management with a highly successful track record of neighborhood creation in southeastern Wisconsin. Our Wisconsin condominium developers proudly bring you “The Glens” in the Brookfield, Menomonee Falls, Oconomowoc, Sussex, Greenfield, Cedarburg, Muskego, Franklin and Mukwonago municipalities. Cornerstone Development strives to provide an exceptional community of single story living to create an environment where people enjoy a carefree lifestyle, an enriched life, and a neighborhood offering a remarkable experience.

Call Today (262) 932-4188

MEET OUR PEOPLE

When you decide to build your new condominium home with Cornerstone Development of SE Wisconsin, you  receive not only the highest quality workmanship and materials. You have the opportunity to work with some of the very best people in the home building industry!

Please take a few moments to meet the people on the Cornerstone TEAM!

GARY SCHROEDER
Earth Care Window Treatment & Design

BOB TARANTINO
Redefined Realty

BRETT & DAN WITTIG
Squared Away Builders

LYDIA HEIDEN
Compass Title, LLC

IRV KRIST
CORNERSTONE Construction Mgr.

JOAN RAJCHEL
CORNERSTONE Warranty Coordinator

JOHN HUSKISSON
CORNERSTONE Director of Operations

CHRIS FOWLER
CORNERSTONE Construction Mgr.

MIKE HEFFNER
CORNERSTONE Warranties Mgr.

RYAN KLEISNER
Drexel Building Supply

Brett Engelking
Citizens Bank

KEITH BECKER
Malkins Flooring

Rebecca Zuba
CORNERSTONE Designer