Mark Schlag

Mark Schlag

Retail Brokerage | CCIM, CLS

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Mark Schlag has been a retail and investment specialist at Thornton Oliver Keller since 1993. Primary areas of expertise include retail landlord and tenant representation, retail investment sales and development services, including site assemblage.

Mark started his career in commercial real estate while completing his degree at Seattle University. Upon returning to Boise, Mark was recruited by the original founding partners of Thornton Oliver Keller as a retail specialist. A reputation for superior customer service and an ability to creatively approach the objectives of his clients has earned Mark a distinguished reputation within the local industry.

Mark has participated in numerous projects including the development, lease up and subsequent sale of the 71,000 square foot mixed-use One Front Street building; the acquisition and redevelopment of the 118,000 square foot Cole Village Shopping Center; and has increasingly developed notable national representation accounts including AutoZone, Bank of America, Chipotle Mexican Grill, Key Bank, SleepTrain and multiple others.

Mark graduated from Seattle University in 1993 Magna Cum Laude with a Bachelor of Arts in Business Administration in Finance and Economics.


Mr. Schlag maintains membership within the following organizations: International Council of Shopping Centers (ICSC) where he has attained the certification of Certified Leasing Specialist (CLS); CCIM Institute as the former President of the Idaho Chapter of CCIM, and is a member of the Boise Metro Chamber of Commerce (transportation committee).


Mark resides in Boise with his family. An avid outdoorsman, Mark’s time away from the office is spent with family and friends fly-fishing, skiing, running, backpacking and pursuing all that the Idaho outdoors have to offer.

Recent Posts

Boise Idaho's growth good for business

In 2017, Boise’s migration rate was twice that of Seattle’s and three times greater than Denver’s.  There is no doubt that Boise is attracting talent, business expansion, and economic investment. 

New Albertsons grocery store on Broadway in Boise

Albertsons completed construction on their new 64,600 SF store on Broadway.

Boise ldaho's cost of living remains low

Boise’s cost of living is a key driver of growth. Historically, the cost of living in Boise has been considerably lower than other regional metro areas, including Seattle, Portland and Salt Lake Ci

My Featured Listings

Block 44 - Main Photo
800-826 Idaho Street
Boise, Idaho
Retail for Lease
Available: 1,068 SF
Rate: $20.00/SF NNN
Holly Plaza - Main Photo
104-224 Holly Street
Nampa, Idaho
Retail for Lease
Available: 1,235 to 2,581 SF
Rate: $8.00 - $9.00/SF NNN
8574 Fairview Avenue - Main Photo
8574 W. Fairview Avenue
Boise, Idaho
Retail for Sale or Lease
Available: 10,132 SF
Price: $1,150,000.00