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Your Custom Home Builder for North Idaho

The creation of a unique, beautiful, finely crafted home requires communication, organization, teamwork, loyalty and commitment to quality. Since 1970, we have earned the respect of our clients because we have consistently upheld these standards. Each team member shares a common goal: to deliver the best home possible by being intimately involved with every phase throughout the project. Our stunning homes are exclusive to your location, and each is as unique as the clients with whom we are grateful to collaborate.

 • Family Homes • Custom Homes • Ranch Homes • Timber Frame Homes
• Log Homes • Contemporary Homes • Waterfront Homes • Apartments • Condos • Townhomes
• Land Development • Architectural Design • Commercial • Investment Opportunities


bill koll

Bill Koll’s name has become synonymous with high quality homes.  From the unique designs, the outstanding quality, and old world craftsmanship, every home is built with his desire to surpass the expectations of the client.  A fourth generation of home builders, beginning in California where he worked with his father, Myron Koll, he then successfully created his own company and constructed over 1800 single family units, several condos, apartment buildings, and developed subdivisions. Bill continues the proud tradition of the Koll family of builders.

Moving to Coeur d’Alene, Idaho in 1993 Koll began developing several properties, renovating homes, apartments, and to date building thirty five custom homes, of various styles and size, ranging from 1600 to 8,000 square feet. Several of the award winning homes have received local and national recognition.

Currently, Rainbow Mountain Development, Bill Koll and his team of professional subcontractors are building homes in Coeur d’Alene, Idaho, North Dakota, and in California with his son, Greg Koll, President of Koll Custom Homes.

Building a Tradition of Distinction…..Five Generations Strong



North Idaho
Chris Koll
208-667-9765

North Dakota
Bill Koll
208-929-0750

Southern California
Greg Koll
888-534-5655