Process · Denver, CO

How your ADU gets built, stage by stage.

Five stages, one team. You make the decisions on layout, finishes and budget; we handle the drawings, the city and the crews.

  1. Step 1Lot checkZone district, context, alley, historic status.
  2. Step 2Visit and quoteMeasurements, utilities, then a written, itemized quote.
  3. Step 3Design and permitsDrawings, engineering, filing and corrections.
  4. Step 4Build and inspectConstruction through final inspection and occupancy.

What happens in the lot check?

You send the address through the contact form. We look up the zone district and neighborhood context, lot dimensions, alley access, historic or parkway designations and the city that reviews your permit. Then we tell you which ADU types look feasible and what questions remain.

What happens at the site visit?

We measure the yard, garage or basement, locate the sewer cleanout, water service and electrical panel, and look at how crews and materials will reach the build area. You then receive a written, itemized quote and a schedule, and you decide whether to proceed.

What does design involve?

  • Layout choices: bedrooms, kitchen size, entry, storage.
  • Exterior design that fits the zoning and, where required, historic review.
  • Structural engineering, including snow loads and foundations.
  • Energy design to the code your city has adopted.
  • Finish selections made before filing, so the quote holds.

How does permitting work?

In Denver we file the zoning, building and sewer use and drainage permits together, then the trade permits once the residential construction permit is issued. We answer review comments until the permits are ready. Under Colorado's HB24-1152, a qualifying ADU in a covered city is approved administratively, without a public hearing.

What happens during construction?

  1. Demolition and site preparation, if needed
  2. Utility trenching and foundation
  3. Framing, roof and windows
  4. Plumbing, electrical and mechanical rough-in, then inspection
  5. Insulation, drywall and finishes
  6. Final inspection and certificate of occupancy

How long does it take?

It depends on the ADU type, the city's review time and how many correction rounds the plans need. A basement unit in a city with fast review moves quickest; a two-story detached unit in a historic district takes longest. Your schedule comes with your quote.

Updated October 2026.

What could your Denver-area lot hold?

Give us the address and the type of unit you have in mind. We read the zoning for that parcel and reply with what looks buildable. Denver, Lakewood, Aurora, Englewood and Arvada.

We only use these details to answer you about your ADU.