You received a preliminary notice and it is a very official, intimidating looking document. A preliminary notice is not a lien. It is actually a document designed by the state of Colorado to protect you from having a lien filed on your property.

This notice is sent to all of the property owners we provide services with outstanding balances exceeding 60 days, we do this as a normal course of business billing procedures.

It means that we have supplied materials & labor for the work on your property. When you decide to hire a contractor to make improvements to your property it is common practice for them to hire subcontractors, purchase materials or rent equipment in order to complete the job. Since you are the party that benefits from the improvements to your property, you are ultimately responsible for ensuring that everyone that provided good and services to your project are paid. If/ when workers or suppliers are not paid, they can file what is referred to as a "mechanics lien" on your property for the value of the unpaid goods or services.