Prime Structure LLC is proud to announce an important professional milestone: owner Viktar Astreika successfully passed the ICC F13 National Standard Residential Building Contractor (C) examination. The F13 credential is recognized by a number of Colorado building departments as an accepted testing credential for residential or Class C contractor licensing.

For homeowners, this milestone means Prime Structure is continuing to strengthen the licensing and code-knowledge foundation behind the residential remodeling and construction work we perform throughout the Denver Metro Area.

What Is the ICC F13 Residential Building Contractor Exam?

The ICC F13 National Standard Residential Building Contractor (C) exam is a national contractor examination administered through the International Code Council testing program. ICC's contractor bulletin identifies F13 as the Residential Building Contractor (C) examination and covers residential code topics such as permits and general regulations, life safety, structural systems, foundations, floors, wall framing, roof construction, masonry and the building envelope.

The credential is especially relevant to residential construction because it demonstrates tested knowledge of code provisions and building systems that affect residential work. Passing the exam, however, is not the same as receiving one statewide Colorado contractor license. Local cities and counties determine their own contractor licensing requirements.

F13 is an important qualification that can support local Class C contractor licensing, but each Colorado jurisdiction determines the license, insurance, experience and application requirements for work within its boundaries.

How F13 Supports Contractor Licensing in Colorado

Colorado contractor licensing is largely jurisdiction-specific. That means a contractor may need separate licensing or registration depending on the city or county where a project is located. The value of the F13 credential is that several Colorado jurisdictions recognize it as an approved examination or competency credential for residential or Class C licensing.

For example, the City of Centennial lists the ICC F13/W13 test as accepted proof of testing for its General Contractor Class C license. Centennial describes its Class C license as covering residential construction, alteration, additions and remodeling within the scope established by the City's licensing code.

Thornton's published contractor licensing materials also identify F13 as an accepted ICC test for a Class C license and list multiple Colorado jurisdictions participating in its Class C reciprocity framework, including Arvada, Aurora, Boulder, Centennial, Commerce City, Denver, Englewood, Fort Collins, Jefferson County, Littleton, Longmont, Louisville, Loveland, Grand Junction, Park County, Pikes Peak Regional and Wheat Ridge. Reciprocity and individual license approval are still subject to the requirements of the jurisdiction where work will be performed.

Prime Structure's Current Licensing Status

Licensing requirements and processing times vary by jurisdiction. Before beginning regulated work, Prime Structure confirms the contractor licensing and permitting requirements that apply to the specific project location.

What Type of Work Does Prime Structure Perform?

Prime Structure is a Denver-area residential remodeling and construction contractor focused on projects that require careful planning, reliable execution and attention to building-code requirements. Our services include:

• Bathroom remodeling — complete renovations, showers, tile, vanities, fixtures and finish work.
• Kitchen remodeling — interior renovation, layout updates, finishes, cabinets and related construction.
• Basement finishing and framing — framing, finishes and full basement improvement projects.
• Custom deck building — new decks, replacement decks and outdoor living improvements.
• Structural repairs and retrofits — construction associated with structural repairs and upgrades, with engineering and permits when required.
• Fireplace repair and renovation — finish upgrades and fireplace remodeling.
• Pre-sale home preparation — targeted interior and exterior improvements before listing a property.

Homeowners searching for a residential remodeling contractor in Denver, Centennial, Jefferson County, Parker, Arvada, Lakewood or the surrounding Denver Metro Area can contact Prime Structure to discuss the project scope, local licensing requirements and permitting needs.

Why Contractor Licensing Matters to Homeowners

Contractor licensing is one part of responsible project delivery. Depending on the jurisdiction and project, licensing requirements can include proof of competency, insurance, local registration, supervisor credentials and permits. Centennial, for example, requires contractors performing work in the City to be licensed and requires supporting documentation such as insurance and testing credentials when applicable.

For Prime Structure, passing F13 is not simply a marketing credential. It is part of a broader commitment to building-code knowledge, proper permitting, safe residential construction and continued professional growth.

Frequently Asked Questions

Does passing F13 mean Prime Structure has a statewide Colorado contractor license?

No. Colorado does not use F13 as one automatic statewide residential contractor license. Local jurisdictions establish their own contractor licensing rules. F13 may serve as an accepted testing credential where the local authority recognizes it.

Is Prime Structure licensed in Centennial?

Yes. Prime Structure LLC currently holds City of Centennial General Contractor Class C license CL-007624-2026, valid through September 11, 2027.

Can Prime Structure work outside Centennial?

Prime Structure serves the Denver Metro Area. When a project is located in another jurisdiction, we confirm that jurisdiction's contractor licensing, registration and permit requirements and obtain the required local credentials before regulated work begins.

What kinds of projects can Prime Structure help with?

Our core work includes bathroom remodeling, kitchen remodeling, basement finishing and framing, custom decks, structural repairs and retrofits, fireplace renovations and pre-sale home improvements. Visit our Services and Projects pages to see more.

Official Licensing & Exam References

• International Code Council — National Contractor/Trades Examination Bulletin
• City of Centennial — Apply or Renew a Contractor License
• City of Centennial — Contractor License Classification and Fee Schedule
• City of Thornton — Contractor License Packet and Reciprocity Information

Ready to discuss a remodeling or residential construction project? Explore our completed projects, learn more about Prime Structure, or contact us.

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