Square One, Inc. is a mechanical and plumbing consulting engineering firm, located in Castle Rock, Colorado offering design of Plumbing and Mechanical systems. With seventeen years of engineering experience and over thirty-five years of practical hands-on experience, our goal for each project is the timely design of energy efficient systems within an associated budget. Utilizing resources of our Plumbing and Mechanical construction experience, our designs incorporate knowledge of construction methods and current material/equipment pricing. The combined engineering and construction services of Square One, Inc can be utilized for a design/build approach of Plumbing and Mechanical systems to further streamline the design and construction process.


To produce quality construction documents, Square One, Inc. is committed to strong communication with our clients and all members of the design team. Our objective is met only when our client receives a design that can be constructed by practical methods, is integrated with architectural aesthetics, incorporates systems yielding maximum energy efficiency, and meets all project requirements within budget. If we can be of service to you, please contact the following personnel:


We provide the following mechanical engineering services:


  • Design of central heating and cooling plants to include air cooled and water cooled chillers; cast iron, firetube, water tube and condensing boilers.
  • Mechanical and ventilation system design utilizing a variety of rooftop equipment. i.e. – packaged rooftop unit either gas-fired or hot water, DX or chilled water; Variable Air Volume (VAV); Dedicated Air System and Make-up Air Systems.
  • Mechanical system designs utilizing split systems; water source heat pumps; self-contained systems; dedicated air systems; unit heaters, unit ventilator and fan coil units.
  • Exhaust air system design for a variety of applications such as general exhaust, kitchen exhaust and science room exhaust.
  • Special exhaust system design for vehicle maintenance facilities, science lab hoods and kiln rooms

mechanical engineering services

CALL US TODAY: (720) 580-0122