Commercial, standard due diligence period is probably 30 days, any environmental concerns, need for Phase II, or anything else out of the ordinary at the property we usually push for 45 or 60.

Sustainability and environmental awareness need to always be on the top of our priory list in any project.  

Army Corp of Engineers, Department of Natural Resources, and Department of Environmental Management (not sure of the Colorado equivalents).  

I would be sure the agent you choose is specifically well versed in the neighborhood or town you are looking into, and make sure that you review all engineering, environmental (if applicable, and depending on depth of testing you do, commercial or residential, etc.) and inspection reports closely.

A 30 year old HVAC system probably uses the "old" freon, which costs so much more due to government/environmental regulations put in place due to its harmfulness to the planet.

At minimum you will need to get a geotechnical engineer to look at your souls, an environmental engineer to perform a phase one assessment and a civil engineer to prepare a site plane.

That's from lending to environmental requirements, to required processes, to fees (which can kill a deal from mere inception).... 

There are no environmental surveys for this property.

NHD, Environmental Report Phase One , Pest Report, Termite Clearance ,CLUE Report, Surveying.

., update plumbing and environmentals, all new kitchen and baths, etc.In some places, electrical, plumbing, etc. must be up to code just to resell.David J Dachtera