Building Safety in Longmont, CO

If you live in Longmont or are thinking about moving there, building safety are one of those things you probably won't think about until they affect you directly. Longmont has 8 specific rules on the books covering different aspects of building safety, and some of them might surprise you.

Childcare Center Rules

Longmont's amended International Existing Building Code lets a home caring for five or fewer children, or five or fewer people receiving custodial care, stay classified as a Group R-3 residential occupancy instead of a commercial Group E or institutional Group I-4 use. The exception, at Municipal Code section 16.40.200, spares small in-home day cares from the sprinkler retrofit section 803.2 would otherwise force during renovation work.

Key details: In-home care threshold: Five or fewer children or persons receiving care. Occupancy effect: Stays Group R-3 residential, not Group E or I-4. Governing chapter: IEBC Chapter 16.40, 2024 edition as amended. Adopted: Ord. No. O-2026-32, Section 1, June 9, 2026. Child definition: 12 years of age or younger, Section 16.40.130.

Section 16.40.120 makes it unlawful to erect, alter, occupy or maintain a building in violation of Chapter 16.40, including running a day care outside these exceptions without the sprinkler or fire protection upgrade the base code requires. Each day the violation continues is a separate offense, punishable under Chapter 1.12 of the Longmont Municipal Code. The building official can order correction regardless of any penalty already imposed, and the city attorney may pursue a violation as a public nuisance in court in addition to any citation.

Carbon Monoxide Detectors

Longmont requires carbon monoxide detection in every dwelling unit with a fuel-fired appliance, fireplace, or attached garage under Longmont Municipal Code § 16.20.380, which rewrites the adopted International Property Maintenance Code's Section 705.1. Detectors must sit within 15 feet of sleeping areas, and a triggering sale, ownership change, or permitted alteration locks in the duty.

Key details: Trigger: Sale, ownership change, or permitted work since 7/1/2009. Placement: Within 15 feet of sleeping areas. Bedroom rule: Alarm inside room if appliance is there. Detector types allowed: Battery, hard-wired, or cord-and-plug. Max penalty: $500.00 fine, 90 days jail per day.

Skipping a required detector is a Section 109.1 violation; each day without one is a separate offense under Section 109.2, carrying up to a $500.00 fine and 90 days in jail per offense under Chapter 1.12. The city may also pursue the violation as a public nuisance, correct it, and lien the property for the cost plus a 20 percent administrative charge, appealable within 14 days.

Elevator Maintenance

Longmont amends International Building Code Section 3001.1 to add one enforceable line: every elevator in the city must be inspected annually. The chief building official's inspection division enforces the requirement under chapter 16.04 of the Longmont Municipal Code, and elevator installation or repair work must be performed by a contractor holding the city's Class D-11 elevator specialty license.

Key details: Inspection frequency: Annually, all elevators (§ 16.04.450). Enforcing official: Chief building official / inspection division. Max penalty: $500 fine and/or 90 days jail, § 1.12.010. Appeals body: Master Board of Appeals, chapter 16.30. Installer license: Class D-11 elevator specialty license, § 16.48.080.

Operating or maintaining an elevator without its required annual inspection is a code violation under § 16.04.120: it's a separate offense for each day it continues, and the city can also treat it as a public nuisance subject to court injunction. Chapter 16.04 assigns no elevator-specific fine, so § 1.12.010's general penalty applies: up to a $500.00 fine, up to 90 days in jail, or both, per conviction, on top of any correction order the building official issues.

Electrical Permits

Longmont wrote its own National Electrical Code administration chapter by Ordinance No. O-2024-49 on July 23, 2024. Longmont Municipal Code § 16.08.160 requires a permit for most electrical work, exempts minor repairs, sets a 365-day permit expiration, and lets the city council set fees by resolution. The chief building official reviews plans, issues certificates of approval, and can revoke permits or issue stop-work orders under the same chapter.

Key details: Permit source: Longmont Municipal Code § 16.08.160. Adopting ordinance: Ord. No. O-2024-49, effective 7-23-2024. Permit expiration: 365 days from issuance or last activity. First-offense penalty: $100 administrative civil penalty. Repeat penalty: Up to $500, chapter 2.97.

Chapter 16.08 violations run through the city's administrative civil penalty track under § 16.08.190(C) and chapter 2.97, not the ordinary building-code criminal fine. Section 2.97.040 sets escalating penalties: $100.00 for a first administrative order, $200.00 for a second order on the same violation within 12 months, and $500.00 for a third or later, with each day of noncompliance a separate offense. A recipient can request a no-cost administrative review, or, within ten days and a $35.00 fee, a formal appeal hearing under § 2.97.050.

Building Inspections

Longmont requires anyone who installs electrical equipment under a non-annual permit to notify the chief building official once work is done; the official then inspects and, if the work conforms, issues a certificate of approval. Work that will be covered by building materials cannot be concealed until the chief building official has approved it first.

Key details: Enforcing office: Chief building official, 385 Kimbark St. Concealment rule: No covering hidden wiring until approved. Permit expiration: 365 days unused or suspended. Defect notice: Written notice naming code defects. Penalty: Administrative civil penalty under ch. 2.97.

Violating chapter 16.08, including working without required inspections or concealing wiring before approval, carries an administrative civil penalty under Longmont Municipal Code chapter 2.97, with each day a violation continues counted as a separate offense. The chief building official may revoke the permit or issue a stop-work order that halts all further work until the violation is corrected, and any uncorrected violation is also a public nuisance the city attorney can ask a court to enjoin.

Plumbing Permits

Longmont adopts the 2024 International Plumbing Code by reference under Longmont Municipal Code § 16.16.010, with the city's own amendments controlling wherever they conflict with the model text. Ordinance O-2026-27 rewrote the plumbing chapter on June 9, 2026, resetting permit fees, valuations, refunds, appeal routing and violation penalties alongside the newer code edition.

Key details: Code adopted: 2024 International Plumbing Code. Adopting ordinance: O-2026-27, effective 6-9-2026. Application lapses: 365 days if not pursued or permitted. Extension available: Up to 180 days, written request. No-work refund: 80 percent of permit fee.

Sections 114.1 through 114.4 make it unlawful to erect, install, alter, repair, relocate, add to, replace, demolish, use, occupy or maintain plumbing work in violation of the code. Each day or part of a day a violation continues is a separate offense, punishable under chapter 1.12 of the Longmont Municipal Code. Paying one penalty does not excuse the violation or allow it to continue; the responsible party must still correct or remedy the defect within a reasonable time. Every violation is also declared a public nuisance that a court of competent jurisdiction can enjoin, and the city attorney may separately pursue legal or equitable relief.

Fire Sprinkler Requirements

Longmont has not adopted the model code's mandate for automatic fire sprinklers in new one- and two-family homes. Longmont Municipal Code § 16.06.200 amends International Residential Code Section R313.2 by inserting language that expressly defers those sprinkler provisions to a future code adoption, so builders of most detached and duplex homes in the city face no sprinkler mandate under this section today.

Key details: Sprinkler mandate status: Deferred, not currently required (§ 16.06.200). Affected code section: IRC R313.2, one- and two-family dwellings. Voluntary use: Offsets exterior wall/floor rules (§ 16.06.160, .170). Adopting ordinance: Ord. No. O-2021-65, effective 11-30-2021. General code penalty: $500 fine, up to 90 days jail (§ 1.12.010).

There's no violation tied to a missing residential sprinkler system under this section: because Longmont deferred R313.2 rather than adopting it, building permit reviewers don't require a sprinkler system as a condition of a certificate of occupancy for a one- or two-family home under this provision. General violations of chapter 16.06, such as unpermitted alterations or code deficiencies found at inspection, still fall under § 16.06.120, punishable per § 1.12.010's cap of a $500.00 fine and up to 90 days in jail, but an unsprinklered new house alone isn't one of them.

If you are coming from a city with tighter rules, you will find Longmont gives residents more flexibility on fire sprinkler requirements.

Building Permits

Renovating, remodeling, or adding onto an existing Longmont building triggers full code compliance for the whole space once the work exceeds 50 percent of the floor area within a 24-month period.

Key details: Threshold: 50% of floor area. Look-back window: any 24-month period. Trigger: renovation, remodeling, or additions. Result: entire occupancy must fully comply.

Remodeling beyond the 50 percent threshold without bringing the full occupancy into code compliance is a building code violation, enforceable through Longmont's standard code enforcement and permit process.

The Bottom Line

Longmont's building safety rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Longmont is broadly strict or permissive.

Keep in mind that Longmont can amend these rules at any council meeting. For the most current version of any rule mentioned here, check the specific ordinance page, where we track updates as they happen.