We have been in this line of work since 1992 when I use to work for my father-in-law who owned his own sewer &septic business then when he retired I opened my own to carry on his legacy.
New Mexico Laws allow a homeowner to act as the general contractor for constructing or altering their primary residence and obtain required project permits without becoming a licensed contractor. The homeowner must comply with all provisions of CILA, regulations, standards and codes including requirements for workers compensation insurance. If hiring employees homeowners must perform all Taxation & Revenue Department reporting requirements. All homeowner's subcontractors are required to be licensed and permitted their own work.
To verify if a contractor complies with building codes and doesn't have any complaints against their working, a homeowners can call CID Santa Fe Office at 505-476-4700. To check if contractor's license is an active go to http://verification.rld.state.nm.us/