Hiring Contractors for a Denver Rental: Licenses, Permits and Costs

General information for Denver-area rental owners, not legal advice. Rules and prices checked October 27, 2026. Cost ranges are published estimates, not quotes.

The rule in one sentence

Denver's building code says licenses "shall be required for any work requiring a permit." If a job needs a permit, it needs a Denver-licensed contractor. If a job is permit-exempt, like painting or replacing a toilet with the same kind, Denver doesn't require a license for it.

Why landlords can't usually do permitted work themselves

Denver offers a homeowner permit, but it's narrow:

• It covers a single-family home only. Work on ADUs, townhomes, condos and duplexes is excluded.
• The owner must live in the home, or agree to live there for at least 12 months after the work is done.
• LLCs and corporations can't get one.

If tenants live in the home, you almost certainly don't qualify. State law points the same way: Colorado's exemptions that let owners do their own electrical and plumbing work don't apply to property "occupied or to be occupied by tenants."

Which trades are licensed, and by whom

Denver doesn't accept contractor licenses from other cities or states. A contractor licensed in Aurora or Lakewood still needs a Denver license to do permitted work in Denver. Outside Denver, check with that city.

Jobs that need a permit in Denver

Common rental jobs that need a permit:

• Roof replacement, and roof repairs over 10% of the roof or two squares, whichever is smaller.
• Furnace, AC and water heater replacement. Like-for-like swaps in single-family homes and duplexes can usually get a same-day Quick Permit online.
• Electrical service upgrades, panels, subpanels and EV chargers. Also Quick Permit eligible for single-family homes and duplexes.
• Sewer line repair. Needs a sewer use and drainage permit and a sewer inspection permit before work starts.
• New windows or enlarged openings. Same-size replacement windows and doors in one- and two-family homes don't need a permit, except on landmark properties.
• Decks 30 inches or more above grade, or over 200 square feet. Fences over 4 feet.

Permit-exempt work includes painting, flooring, cabinets, countertops, small drywall patches (32 square feet or less) and like-for-like sink, toilet and disposal replacement.

How to vet a contractor

1. Check the license on Denver's contractor license search and, for electricians and plumbers, the DORA lookup.
2. Get proof of insurance: general liability, and workers' compensation if they have employees.
3. Get a written contract with scope, materials, price, schedule and who pulls the permit.
4. Get two or three bids for anything over a few hundred dollars.
5. Ask for references from other landlords or property managers, not just homeowners.

The city's own advice: avoid contractors who want you to get the permit in your name. "The permit holder is legally responsible for the completion of the job to building code standards." And "don't make final payment until building inspections have been approved."

Typical Denver costs

Ranges are from Angi's 2026 Denver cost guides. Your quote depends on the home, access and materials. See each trade guide for details.

Paying contractors without lien trouble

Colorado contractors, subcontractors and suppliers can file a mechanic's lien against your property if they aren't paid. A few protections:

• Pay against progress, not in advance. Large upfront deposits are a red flag.
• Get lien waivers from the contractor, and from major subcontractors and suppliers, as you pay.
• Watch for a notice of intent. A claimant must serve one at least 10 days before filing a lien.
• Know the paid-in-full defense. For an existing single-family home, paying the full contract price to the contractor can be a defense against subcontractor liens. It doesn't appear to cover multifamily rentals, so lien waivers matter more there.

Two Colorado rules every landlord should know

Colorado's 2024 habitability law (SB24-094) added two contractor-related duties:

• Gas hazards need a professional. A landlord must hire a professional to fix hazardous conditions involving gas piping, gas appliances or other gas equipment.
• Keep repair records. Landlords must keep records of habitability notices and repairs for the whole tenancy plus at least three years, and give tenants copies within 10 days on request.

Habitability repairs also have deadlines: start within 24 hours for conditions that threaten life, health or safety, and within 72 hours for other conditions. That's why a reliable vendor list matters before something breaks. See our repair responsibilities guide.

How to get help

A good property manager already has licensed, insured vendors and can get them out fast. Ask any manager how they choose vendors, whether they mark up invoices, and what they can approve without calling you. We'll match you with up to three vetted, licensed Denver-area managers. Free, no obligation. Get matched free.