D.J. "Sandy" Colling

Sandy has a unique position in the real estate industry.  For over 30 years, he has simultaneously sold real estate and managed other agents. “Managing and selling gives me the opportunity to work with a variety of client situations, contract issues and negotiations on a daily basis.  This keeps me current with changing market conditions, helps me with my clients, and keeps our office on a successful path.”


The Denver Technological Center (DTC) office of Perry & Co. has been consistently one of the top three real estate offices in the major metropolitan area in production per agent since its establishment approximately ten years ago.


Sandy’s professional accomplishments include:

  • Past President of two Realtor® Associations.
  • Featured Speaker and sales trainer, including being one of the keynote speakers at the Colorado Real Estate Convention, and a certified NINJA real estate instructor.
  • Active volunteer in many civic and community endeavors:   the Ethics committee for the South Metro Realtor® Association, past member of the Castle Pines North Metro District, and various church and community leadership positions.
  • Real Estate sales in excess of $6,000,000 annually for over 25 years.


He and his wife Brenda live in Castle Pines North and have two grown children and twin grandsons.  Having raised their family in the Denver area, Sandy has extensive knowledge about schools, transportation conditions and neighborhood trends that exist in the south suburban Denver Metro area.


Sandy’s clients say this about working with him:
"Perhaps the best reference I can give for Sandy is to say that I have referred him to many of my friends and associates when they have been in need of real estate advice. I recommend Sandy Colling without reservation and would be pleased to answer personally any questions about his qualifications."


"Sandy became that advisor and clearly demonstrated that listing our real estate was NOT about getting something FROM us, but was precisely the opposite...it was about giving something TO us.  It was about Sandy sharing his time to think "with" us.  It was about giving us insight from his unending knowledge within the field. It was truly about a recommendation where the financial reward was not directed to Sandy, but rather where the emotional and financial win was directed to us! Thank you, Sandy!" 


2 Testimonials

"It is a snowy day in Colorado and my wife Jane and I are cozy and snug in our new home in Centennial. After a couple of false starts, we finally found the perfect home for us thanks to Sandy and his faithful colleague Kim Hutchins. Together to supported Jane as she examined dozens of their recommendations. They never gave up on us and work many long hours to family d this our ideal home. The closing went smoothly thanks to both Sandy and Kim! So, on this snowy day in Colorado, jane and I joyously celebrate our fabulous new (to us) home! All thanks to Sandy and Kim."

Edmond Joseph Rivet, submitted 1/5/17

“If you have heard of the preeminent real estate teacher in the nation, Larry Kendall of Ninja Selling, you might be surprised to learn that once upon a time Larry had a mentor in real estate.  Larry’s mentor way back when was our own Sandy Colling.  Well Sandy realized a few years ago that he could learn a few things from Larry as well so he enrolled in and completed the Ninja Selling teacher’s certification.  Now Sandy uses his old, and new, skills to coach Perry & Co. Realtors.  He does so in a most straightforward and caring way and as such our new Realtors build their business in quick fashion.  He also motivates our seasoned Realtors to continue to grow their business daily, while at the same time putting his buying and selling client’s needs ahead of all others.”

Jon Larrance, submitted 4/22/16


Agent Map



  • Buyer's Agent
  • Certified Residential Specialist (CRS)
  • Investor Specialist
  • Luxury Specialist
  • Management
  • Ninja Selling® Trained
  • Realtor®
  • Relocation Specialist
  • Seller's Agent
  • Support Staff