Following several devastating wildfires across Colorado, the state introduced the Colorado Wildfire Resiliency Code (CWRC) through Senate Bill 23-166 in 2023. The goal is to help homeowners and communities better protect their properties from future wildfire events while reducing the risk of widespread damage in high-risk areas. By July 1, 2026, local jurisdictions throughout the state must fully implement the code, making it an important consideration for homeowners, builders, and property owners alike.
While the CWRC is designed to improve safety and strengthen Colorado’s wildfire resilience, understanding exactly what is required can feel overwhelming. From building materials and landscaping requirements to insurance considerations and future renovations, there is a lot to navigate. The good news is that understanding the code doesn’t have to be complicated. In this guide, we’ll help you understand the Colorado Wildfire Resiliency Code is, where it applies, and how it may impact your property and future building plans.
What Is The Colorado Wildfire Resiliency Code?
The Colorado Wildfire Resiliency Code (CWRC) was established to help reduce the loss of homes and property during wildfires. As more communities have expanded into Colorado’s Wildland-Urban Interface (WUI) areas, where residential development meets undeveloped land, the need for stronger wildfire-resistant construction standards has become increasingly important.
To help address this growing risk, the CWRC outlines standards for building materials, construction practices, and defensible space around the home. These requirements are designed to make homes more resilient to wildfire exposure while providing homeowners with a clear framework for building in higher-risk areas. In addition to improving safety, CWRC compliance may also support insurance eligibility, risk assessments, and future opportunities for homeowners seeking coverage in Colorado’s evolving insurance market as well as possible discounts on existing policies.
When Does CWRC Take Effect?
The Colorado Wildfire Resiliency Code began implementation in April 2025, marking the start of a structured transition period for builders, developers, and property owners adjusting to updated wildfire mitigation requirements. While this phase allows time to prepare and bring projects into alignment, full compliance becomes mandatory on July 1, 2026.
After that deadline, any project or property that does not meet the required standards may be subject to daily civil penalties that accumulate for each day of noncompliance. In addition, enforcement actions can escalate depending on the situation, including the issuance of a stop work order until the necessary corrections are made and compliance is fully achieved.
Is The CWRC Retroactive?
The Colorado Wildfire Resiliency Code is not generally applied retroactively to existing homes in their current condition. In most cases, if your home is already built and not undergoing major work, you are not required to immediately bring it up to full CWRC standards.
That changes when significant updates or repairs are made. If scheduled maintenance or repairs involve approximately 25% or more of either the siding or roofing systems, those components must be upgraded to meet current CWRC requirements. This means siding must be ignition-resistant and roofing must meet Class A fire-rated standards, and each full system must be brought into compliance where the threshold is met.
There is also a full compliance trigger tied to expansion. If you complete an addition of 500 square feet or more, the entire structure is required to be brought up to CWRC standards, not just the new portion.
Does The CWRC Have The Same Compliance Code In All Areas?
Not all areas of Colorado are subject to the same wildfire building requirements. The Colorado Wildfire Resiliency Code applies only within designated Wildland Urban Interface areas, where wildfire risk is significantly higher. Within these regions, properties are organized into three distinct zones, and each zone carries different compliance requirements.
These zones are designed to create layered protection around homes by establishing defensible space and reducing the likelihood of fire spread from surrounding vegetation to structures. The closer a structure is to higher-risk areas, the more stringent the requirements become.
For a quick guide, scroll to the bottom of this section.
Zone 1 (0’-5’) | “The Immediate Zone”
Within the 0 to 5-foot perimeter around a home, all materials must be non-combustible. This area should remain completely clear of items that can ignite, including shrubs, mulch, and other organic landscaping materials.
No new trees may be planted in this zone, and any existing trees must meet strict clearance and spacing requirements to reduce fire risk.
Any landscaping within this immediate buffer should be made up of fire-resistant materials such as rock, gravel, or concrete to help limit the potential spread of flames toward the structure.
Zone 2 (5’-30’) | “Fuel Reduction Zone”
The 5 to 30-foot zone serves as a critical buffer between your home and surrounding vegetation. While some combustible materials may be permitted in this area, they must be carefully managed and properly spaced to reduce wildfire risk.
Homeowners should routinely remove dead branches, dry grasses, fallen leaves, and overgrown shrubs that can act as fuel during a wildfire. Regular maintenance in this zone is essential to preventing a small ignition from becoming a larger threat.
The primary purpose of this zone is to slow the spread of fire and reduce the likelihood that flames, heat, or wind-driven embers can travel through vegetation and reach the home. By keeping plants healthy, properly spaced, and free of excess fuel, you create an additional layer of protection around your property.
Zone 3 (30’-100’) | “Risk Mittigation Zone”
The 30 to 100-foot zone is designed to create a safer transition between your home and the surrounding landscape. The goal is to interrupt the path a wildfire can take toward your home by reducing vegetation density and increasing tree spacing. Properly spaced trees help reduce crown fires, limit ember production, and decrease the chances of flames spreading rapidly through the canopy.
When trees are adequately spaced, fires are more likely to move along the ground rather than through the treetops. Ground fires typically burn at a lower intensity, making them easier to contain and less likely to threaten nearby structures.
Within this zone, trees should be spaced at least 10 feet apart whenever possible. Existing trees generally do not need to be removed, but any new trees should be planted with as much separation as practical, with a minimum spacing of 10 feet. Proper vegetation management throughout this area can significantly reduce wildfire risk and improve the effectiveness of defensible space around your home.
If you are unsure how these requirements apply to your property, Colorado State University provides a helpful guide that explains each CWRC zone and its requirements in greater detail.
| Feature | Zone 1 (0-5ft) | Zone 2 (5–30 ft) | Zone 3 (30–100 ft) |
| Roofing | Cass A fire-rated required | Class A fire-rated required | Class A recommended |
| Siding/Exterior | Non-combustible or ignition-resistant material | Ignition-resistant material | Standard materials allowed |
| Decking/Porch Material | Non-combustible only | Ignition-resistant | Treated wood acceptable |
| Vents | Ember-resistant vents required | Ember-resistant vents required | Standard vents allowed |
| Vegitation | No combustible plants or mulch | Lean, clean, green spacing | Reduced fuel, thinned trees |
| Fencing | Non-combustible material only | Non-combustible at home attachment | Standard fencing allowed |
| Does Zook Build To This Standard? | Yes | Yes | Yes |
Will CWRC Affect My Ability To Construct A Modular Home?
No, the CWRC does not prevent you from building a modular home. In fact, modular homes are often well suited for CWRC compliance because approved roofing, siding, and other exterior materials can be incorporated into the design from the very beginning.
When you partner with Zook Cabins, we can help identify compliant materials early in the planning process, making it easier to meet CWRC requirements while still achieving the style, functionality, and features you want in your home. Rather than being a barrier to construction, the CWRC simply establishes standards that help homes better withstand wildfire threats.
Our team has also been working with homeowners rebuilding after Colorado’s recent wildfires, giving us firsthand experience navigating these regulations and helping families move forward with confidence.
What Materials Are Compliant With The CWRC?
Understanding which materials qualify under CWRC standards can feel overwhelming at first. Fortunately, the Colorado Division of Fire Prevention & Control maintains a comprehensive list of approved materials that can help guide your decisions throughout the planning process. While there is flexibility in the products you choose, the overall objective remains the same: selecting materials that are more resistant to ignition and better equipped to withstand wildfire exposure. The video above can also help you better understand how these materials work together to create a more resilient home.
When you work with Zook Cabins, you do not have to navigate those decisions alone. We regularly help homeowners select materials that align with CWRC requirements while still achieving the look and feel they want for their home. Our Two Pines homes are a great example, featuring thermally modified Luna Wood siding, metal roofing, and other design elements that support wildfire resilience.
If the Two Pines style is not the right fit, we offer a wide variety of homes that can be customized to meet your aesthetic preferences while remaining compliant. Matt Kissinger, our sales representative dedicated to Colorado, can walk you through the available options and help you find a home that balances compliance, durability, and the way you want to live.
Does Zook Cabins Build Homes That Are CWRC Compliant?
Yes. When you work with Zook Cabins, we can help ensure your home is designed to meet CWRC requirements from the start. Our team can guide you through selecting compliant materials and features that support wildfire resilience without sacrificing the style or functionality you want.
Beyond compliance, we focus on building homes that are made to last. By combining durable construction methods with CWRC-compliant materials, we help homeowners create homes that offer long-term value and peace of mind.
We have also helped families rebuild after devastating wildfire losses, including homeowners affected by the New Mexico wildfires. More specifically we worked with the Watkins Family. They had to say this about the experience working with us:
“When our log house in New Mexico burned in a wildfire in June of ’24, we began the process of, maybe, replacing it…Luckily, we found Zook. Within a month of the fire, we had toured a Zook cabin in Colorado, and the impression made was completely positive: the house itself and the reports of its buyers, whose experience with Zook had been great…Every person we dealt with at Zook in the process, at a point where we were serious but had not committed any money, was responsive, encouraging, flexible, and creative… The planning was a thoroughly enjoyable experience…We spent the night in the house about four weeks after delivery and celebrated Thanksgiving with the whole family, as we had in our old house just two years before…For planning, creative cooperation, contractual clarity and completeness, personal interactions (they visited the site three times in preparation for the move), workmanship in construction, finishing after delivery and every other element of the process Zook gets an A+!”
~Jim Watkins Zook Cabins Customer 2025
If you are looking to work with a builder who understands building codes and has experience helping families through recovery after a loss, we are here to help guide you through the process.
Will CWRC Affect My Homeowners’ Insurance?
The short answer is yes, it should. But unfortunately, that is not what many Coloradans are experiencing.
Colorado’s House Bill 25-1182, signed into law in May 2025, requires insurance companies to consider wildfire mitigation efforts when evaluating a home’s risk beginning July 1, 2026. That includes features such as fire-resistant building materials, defensible space, and other measures required for CWRC compliance. In theory, homeowners who invest in these improvements should see better insurance opportunities, more favorable rates, and greater access to coverage.
However, many homeowners across Colorado’s Wildland-Urban Interface (WUI) areas are finding that insurance carriers have been slow to recognize and reward these efforts. If you’ve completed mitigation work and still struggle to secure affordable coverage, you’re far from alone. This remains a common challenge throughout many mountain and foothill communities.
While the insurance market continues to adjust, there are several steps you can take to put your self in the best positon:
Keep detailed records of all CWRC-compliant materials, defensible space improvements, inspections, and permits. Having thorough documentation will help demonstrate your home’s reduced wildfire risk. We highly recommend pictures, especially with measurements when applicable.
Contact the Colorado Division of Insurance if you believe your mitigation efforts are not being fairly considered. Just make sure that you are prepared to make your case.
Ask your insurance carrier for your wildfire risk score. Under HB 25-1182, insurers must disclose this information and provide a process for homeowners to appeal inaccurate assessments. Take it a step further and ask when they are specifically looking for to make be eligible for better rates or successful mitigation.
If you’ve been denied coverage by multiple standard insurance carriers, Colorado’s FAIR Plan may provide a temporary path to obtaining coverage.
The good news is that a CWRC-compliant home, especially a new modular home where compliance is documented from the beginning, positions you well for the future. As insurers fully implement these requirements, homeowners who have invested in wildfire resilience are likely to be in the strongest position when it comes to securing and maintaining coverage or filing appeals if needed.
Are There Exemptions To the CWRC?
Yes. If your home was built prior to the wildfires, it is typically exempt from CWRC requirements in its current state. However, once renovation work reaches a larger scope, generally around 25% or more of the home, those updates may trigger CWRC compliance for the areas being improved.
In most cases, this means the existing structure can remain as is, but any significant remodel work will need to align with current wildfire resilience standards for the portions being modified.
Are Metal Roofs Required For CWRC Compliance?
No, a metal roof is not required to meet CWRC compliance standards. While metal roofing is a popular choice because of its durability and excellent fire-resistant properties, it is only one of several roofing materials that can satisfy CWRC requirements.
Homeowners can also choose other fire-resistant roofing options, including clay tile and slate roofing. These materials are recognized for their ability to withstand exposure to embers and reduce the risk of fire spread, making them compliant with CWRC guidelines when installed according to local building codes and manufacturer specifications.
Ultimately, CWRC compliance is based on the fire-resistance rating and performance of the roofing system rather than the specific material itself. This gives property owners flexibility to select a roofing option that fits their budget, architectural style, and maintenance preferences while still meeting wildfire-resistant construction standards.
Is It Easier to build a Modular Home that CWRC-Compliant Compared to a stick-built home?
With a modular home, CWRC compliance is typically more straightforward because the home is planned and built as a complete system from the start. Since it is a new construction process, all materials are selected to align with compliance standards before the home is finished, helping ensure everything meets requirements before it leaves the facility. This early coordination helps keep the process organized and less stressful for you to have an aestheticly pleasing home and functionality with your new home.
How Much Money Does It Cost To Make My Home CWRC Compliant?
The cost of CWRC compliance can vary significantly depending on your home’s age and the scope of work being performed. If your home was built before the code was adopted and you are only performing routine maintenance, you may not have any compliance costs at all.
However, once repairs or renovations reach the 25% threshold, certain upgrades may become necessary to meet current CWRC requirements. In those situations, homeowners often see costs of around $8,000 for a CWRC-compliant roof and approximately $22,000 for compliant siding, though actual costs will vary based on the size of the home and the materials selected.
Ultimately, the true cost depends on whether your project triggers CWRC requirements and which components of the home need to be brought into compliance.
What Counties in Colorado Are Are A Part of The CWRC Zone?
The CWRC is not determined by what county you live in. Instead, it is determined by whether your property is located within a Wildland-Urban Interface (WUI) area, where homes and communities meet natural vegetation and wildfire risk is elevated.
Since WUI areas can be found throughout Colorado, there is a good chance you may encounter CWRC requirements regardless of where you plan to build. That’s why it is important to understand your property’s specific wildfire risk designation rather than focusing solely on county boundaries.
If you’re unsure which CWRC zone applies to your property, your local municipality or insurance provider can help point you in the right direction.
Conclusion…
Understanding CWRC can feel overwhelming, especially after the loss of your home. At Zook Cabins, we have what it takes to provide you with a home that you will not only love but will last for generations to come. When you are ready to bring that dream to reality, contact us, and we will be happy to walk you through the next steps.
