37 Advisory and consultation services relating to building construction and commercial real estate development; Building construction services, namely, construction cost estimating and scheduling in the nature of general construction contracting, supervision, building repair, site development; General contractor services, namely, concrete building construction, steel erection in the nature of steel building construction services, framing, carpentry, drywall, flooring, painting, plumbing, heating and air conditioning, electrical, site clearing, excavation, pad preparation, grading, utility installation and earthworks