La Plata County, CO Building Safety: Fire Sprinkler Requirements (2026)
Key Facts
- Baseline
- Not mandated in one and two-family dwellings or townhouses
- Installed system standard
- P2904, NFPA 13D, or NFPA 13R
- Old Hermosa Cliffs height trigger
- Any floor over 30 feet above fire department access
- Old Hermosa Cliffs access trigger
- No year-round apparatus access within 150 feet of exterior walls
- Old Hermosa Cliffs size trigger
- Dwelling over 3600 sq. ft. excluding the garage
- Exemption path
- Fire Marshal and building official agree, or Board of Review appeal
Summary
In unincorporated La Plata County, Colorado, Section R309.1 of the county's residential code amendments states that automatic fire sprinkler systems in one and two-family dwellings and townhouses are not mandated by that section. Exceptions apply where subdivision approvals require sprinklers and inside the Old Hermosa Cliffs Fire Protection District, under § 18-36.
R309.1 Automatic fire sprinkler systems. Except as provided in section 18-36(309.5) below, automatic fire sprinkler systems in one and two-family dwellings, or townhouses, are not mandated by this section. ... R309. ... 5 Old Hermosa Cliffs Fire Protection District residential fire sprinklers. Within the boundaries of the Old Hermosa Cliffs Fire Protection District the following shall apply: An automatic fire-extinguishing system shall be installed throughout dwellings when any floor exceeds 30 feet above fire department access, or when fire apparatus access is not available year-round within 150 feet of all exterior walls of the building, and/or when the dwelling exceeds 3600 sq. ft. excluding the garage. Residential quick-response standard sprinklers shall be used within the building. The system must comply with NFPA 13D, NFPA 13R or P2904. ... Exception: A single family dwelling may be exempted from the above requirements when the Chief of the Fire Department/Fire Marshal and the building official agree on the exemption, or upon successful appeal to the La Plata County Board of Review.
Full Breakdown
Section 18-36 adopts the 2024 International Residential Code with county amendments, and Section R309 is deleted and replaced with the county's own text. R309.1 states the baseline: except as provided in R309.5, sprinklers in one and two-family dwellings or townhouses are not mandated by this section. When a system is installed, R309.2 requires Group R-3 occupancies to follow P2904, NFPA 13D, or NFPA 13R, and states that other provisions of the Code requiring sprinklers in other occupancies remain in effect. It also records that Fire Districts in La Plata County encourage owners to install sprinklers in new homes to improve the chance of the home surviving a fire in outlying areas.
R309.3 covers the cases where a system is compelled: when a Planning Department process, project conditions of approval, or the owner's request requires a residential system, NFPA 13D, NFPA 13R, or P2904 are the design and installation guidelines. R309.4 keeps alive sprinkler requirements enacted for existing subdivisions or other land use code project approvals, and any future development in those subdivisions and projects must comply with P2904, NFPA 13D, or NFPA 13R.
R309.5 is the local mandate. Within the Old Hermosa Cliffs Fire Protection District, an automatic fire-extinguishing system is required throughout a dwelling when any floor exceeds 30 feet above fire department access, when fire apparatus access is not available year-round within 150 feet of all exterior walls, or when the dwelling exceeds 3600 sq. ft. excluding the garage. Residential quick-response standard sprinklers are used, and an approved automatic smoke-detection system is required, with supervision by an approved central alarm agency recommended. A single family dwelling can be exempted when the Chief of the Fire Department/Fire Marshal and the building official agree, or on successful appeal to the La Plata County Board of Review.
Violations & Fines
Building without meeting a sprinkler condition that applies is a violation of the Code. Section 18-35(114.4) sets a fine of not more than $100 on conviction, and each day a violation continues is a separate offense. The County Attorney can also seek an injunction, mandamus, or abatement. Section 18-35(101.4.5) applies the International Fire Code adopted by Chapter 34 to fire prevention matters, and the certificate of occupancy under Section 111.1.1 requires compliance with that Fire Code.
Frequently Asked Questions
Does a new home in unincorporated La Plata County need fire sprinklers?
What triggers the Old Hermosa Cliffs sprinkler requirement?
Can a single family dwelling in that district be exempted?
Which standard governs a sprinkler system when one is installed?
Sources & Official References
Other rules in La Plata County
Compare La Plata County to another location·View the Colorado building safety overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.