RA Nelson LLC is a Colorado based general contractor construction company. In operation since 1976, RA Nelson's services incl ... ude general contracting, construction management, design-build, and pre-construction services including estimating, 3D Building Information Modeling (BIM), sustainability consulting, feasibility & pro-forma evaluations, MEP reviews, construct-ability examinations, risk assessments, site analysis, schedule development, and subcontractor selection. RA Nelson also provides post-construction property management & maintenance services as well as construction related consulting. read more