Homes with an ADU or casita in Cottonwood Heights.

An accessory dwelling is a property feature, not a promise. On a Cottonwood Heights listing it means a secondary living space that can function on its own: a second kitchen, its own bathroom, a separate exterior entrance, and sometimes a separate utility meter. The words move around. A basement apartment is a lower level built out that way, a casita is usually a detached unit set apart from the house, and a mother-in-law suite is usually an attached apartment on the main or upper floor. The search shows up across the Wasatch Front for two honest reasons, flexible living under one roof and a rentable suite where the unit is legal, and both turn on the same homework, which is whether the space is actually permitted.

Cottonwood Heights is good ground for this search, and the form it takes here is mostly the basement apartment. The city sits on the east bench against the Wasatch between the mouths of Big and Little Cottonwood canyons, the era and the elevation both favor basements, and the housing stock is overwhelmingly single-family detached built from the 1950s through the 1980s, so full basements are the norm rather than the exception. The older mid-bench grid around Butler, the postwar ramblers and split-levels on the established streets between the two creek valleys, carries a deep stock of finished basements that already double the living space. Adding a second kitchen and a private entrance to that kind of full basement is exactly the conversion most of these listings describe. The bench adds a second pattern: on the sloped foothill lots a lower level can open to grade as a daylight or walkout level with full windows and a real door. A fully detached casita is the rarest shape in a built-out bench city, since it takes a lot with room for a second structure, so treat one as a find rather than an expectation.

Here is the part that matters more than the photos. A finished basement is not the same as a legal apartment, and neither is a converted room over the garage or a guest building out back. A second kitchen and an outside door do not make a unit conforming on their own, and a great many existing accessory units in older Utah housing were finished over the years without permits or were built before today's rules. That is not a reason to walk away, but it is the reason to verify rather than assume. Two questions decide everything: whether the unit is permitted with Cottonwood Heights, which runs its own zoning and land use, and whether it has its own legal egress, meaning a code-sized window well or door out of every sleeping room below grade. What an accessory dwelling is allowed to be on a given property depends on that parcel's zoning, so the answer is property-specific, not citywide.

Treat any income angle with the same caution. I will not quote you a rent number or a payment number on a page like this, because what a unit could earn depends on its legal status, the specific space, and rules that change, and a non-conforming unit cannot be counted on at all. What I can do is point you at the right stock. The bench grade helps here: on the sloped foothill lots, a daylight or walkout lower level can open to grade with full windows and a real door, which is the ideal setup for a separate suite that lives like its own floor. If a true separate suite is the goal, the older-core ramblers are the natural hunting ground, so the single-story page is a useful next stop, and the larger upper-bench homes on the luxury page sometimes carry the deepest walkout lower levels. If you only want the extra square footage and not a second kitchen, the homes with a basement page is the wider search. Earlier in the process than show me listings? Start with the Cottonwood Heights guide, and when a home below reads right, that is the moment to reach out.