Denver ADUs still run through zoning and permits

A backyard cottage in Denver is allowed in zone districts that already permit new single-unit dwellings, which opened the door for a lot more homeowners. Picture it built and rented before you picture the work, though, and the gap shows: an accessory dwelling unit is a full building project, with zoning, building codes, address assignment, and utility connections all in the mix.

Each of those becomes its own checkpoint. The review looks at the unit’s size, placement, height, access, and the code path it follows, so a design that pencils out on paper can still need reshaping to fit the lot and the rules. The structure also has to go up under a licensed contractor; the homeowner permit path that covers many do-it-yourself projects will not carry an ADU.

If you are shopping for a property with the dream of adding a second home out back, that is the catch worth pricing in. A wide lot does not guarantee a second dwelling fits, and two similar-looking parcels can land in different zones with different answers.

The cleanest first step is to confirm your zone district and walk the ADU permit guide before any money goes toward drawings. Knowing the build must be contractor-led also reshapes the budget early, while it is still easy to adjust.