Longmont, CO Home Business: Signage Rules (2026)

' Alongside the no-signage rule, a home occupation in Longmont must be run by a resident of the dwelling plus no more than one nonresident employee, and must stay within 50 percent of the home's gross floor area if it doesn't serve customers on-site, or 15 percent if it does, unless the space is a code-defined live/work unit. Subsection f bars 'substantial retailing or wholesaling of stocks, supplies, or products conducted on the premises,' though mail-order delivery to customers off the property is allowed. Subsection g prohibits any exterior storage of home-occupation supplies or materials, and bans chemically hazardous, explosive or combustible materials both inside the dwelling and outside on the property.

Subsection h requires the business provide its own off-street parking without changing the residential character of the property, and subsection i prohibits the home occupation from generating traffic, on-street parking, noise, vibration, odor, glare, fumes or electrical interference beyond what's typical for a residential use. Taken together, the sign ban is the most visible piece of a standard designed to keep a home business invisible from the street.