More times than not, a permit is required to do any work on your home or business. Some common required instances include, but are not limited to: new or expanded structures, renovations or remodeling work, commercial floor plan alterations or change of use, decks, porches, fences, demolition or moving structures, propane installations, fireplace or wood stove installation, electrical, plumbing or mechanical work, fire alarms, sprinkler systems, water heater or furnace installation, signs (both temporary and permanent), roof repairs and re-roof, gas line installation and repair, siding, window and door replacement, sheds 120 square feet or larger, retaining walls and patios, landscape and irrigation systems, and tree removal and trimming. If you are in doubt as to whether your scope of work on your building requires a permit, please call 303-655-2017 to speak to a permit technician.Some work that would not require a permit includes, but is not limited to: interior painting, decorating, carpet or flooring, cabinet work, exchanging light fixtures when wiring will not be altered, sheds less than 120 square feet.