ADU builder · Denver, CO

A second home on your Denver lot, built start to finish.

Detached ADUs, garage conversions, attached units and basement apartments. We draw it, permit it and build it, then hand you the keys. Licensed and insured.

Check my lot

Finished attic room: An empty attic room with light wood floors, beige walls, and a modern chandelier

How much does an ADU cost in Denver?

As of October 2026, one national cost guide (Block Renovation) puts a detached ADU in Denver at about $230,000 to $310,000, with garage conversions starting around $140,000. Design, permit fees, utility work and your lot's conditions move the total up or down. A site visit gives the real number.

We put that number in a written, itemized quote. Read the Denver ADU cost guide.

Which ADUs do we build around Denver?

Detached ADUA stand-alone unit in the backyard, often off the alley. Garage conversionAn existing detached or attached garage made into a legal home. Attached ADUAn addition with its own door, sharing a wall with the house. Basement ADUA separate apartment in the lower level of your home.

Design drawings and the permit set come with every build: how design and permits work. Unsure what your lot supports? Compare the four types.

What are the steps to an ADU?

Step 1Lot checkZoning, lot size, alley access and any historic district.
Step 2Site visit and quoteMeasurements, then a written, itemized quote.
Step 3Plans and permitsZoning, building and sewer permits filed and tracked.
Step 4ConstructionBuild, inspections and the certificate of occupancy.

Walk through the full process.

Where do we build?

Denver and four neighboring cities. Colorado's 2024 ADU law sets a shared floor, but each city still writes its own code and runs its own permit counter.

LakewoodJefferson County suburbs mid-way through a zoning rewrite.ADUs in Lakewood AuroraADUs limited to Original Aurora today, with a citywide change in the works.ADUs in Aurora EnglewoodNew ADU code adopted in May 2026.ADUs in Englewood ArvadaSize caps that scale with lot size.ADUs in Arvada

How ADU permits work in the City and County of Denver.

Is your lot ready for an ADU?

Tell us the address and what you want to build. We look up the zoning and tell you which ADU types look possible, at no cost. We work in Denver, Lakewood, Aurora, Englewood and Arvada.