Your home provides much more than shelter

It's where you retreat, recharge and renew

Reslock and Sullivan, L.L.C. specializes in custom residential projects for mountain, resort and urban areas. We offer a hands-on and personal approach to exterior and interior architectural design, land and site planning, construction administration and consultation services. 

Our goal is to meet the needs of our clients by bringing a fresh and creative design perspective that will be unique to your home. Whether it's new construction or a remodel, we can help reveal your property's exceptional characteristics, like an amazing view or solar opportunity, and help you realize a design that's truly a reflection of you and your family. We can also guide you through the many possibilities available including additions, renovations or retrofitting your residence to support aging-in-place or multigenerational living with parents or adult children.

William Reslock is a registered architect with over 30 years of experience in the design process, with significant concentration in high-end and custom residential. He received his Bachelor of Architecture from North Dakota State University and is licensed in Colorado, Florida, Wyoming and Missouri. Bill is also a member of the American Institute of Architects and the National Council of Architectural Registration Boards.

Debbie Sullivan is a certified urban planner with more than 20 years of experience in real estate development. She received her Master's Degree in Urban Planning from the University of Colorado, as well as a Master's in Business Administration. She's also on the Board of Directors for the Colorado Culture Change Coalition, an organization that works to support elders and aging issues. Debbie is a member of the American Institute of Certified Planners and the American Planning Association and is also a freelance writer specializing in aging issues, residential housing and development.


Please click below for our free design guide, which includes 10 essential questions you should always ask an architect. Plus we'll send you our monthly newsletter that's full of design tips, trends and ideas.

Design Project Planner: A Step by Step Guide of the Design Process

Contact Bill Reslock at or (303) 917-3733