ADU Ledger

Can I Airbnb a Longmont ADU?

✓ Verified against code · August 19, 2026

No — the code prohibits short-term rental of ADUs entirely; nothing under 30 days.

Citation: LMC 15.02.080.D

How current is this?

Longmont’s ADU rules run under LMC 15.02.080.E (Longmont Municipal Code) (Ordinance O-2025-35 (amended by O-2025-83)). Longmont adopted its state-compliance rewrite in June 2025 and amended it again in December. Its distinctive features: proof of City of Longmont residency at application (a broader reading than the statute's resides-on-the-parcel check), a total ban on short-term-renting ADUs, and a flat prohibition in the 100-year floodplain. We verified this answer against primary sources on August 19, 2026, and every change we catch is logged in the changelog.

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Not legal advice — lot-specific overlays can change the answer for your parcel. The citation above points at the governing code section; check it, or ask the city to confirm.