Homes with an ADU or casita in Richfield.

An accessory dwelling is a property feature, not a promise. On a Richfield 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 central Utah for two honest reasons, multigenerational 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.

Richfield is reasonable ground for this search, and the form it takes here is mostly the basement apartment. This is a cold-climate central-Utah town on the Sevier River Valley floor at about 5,354 feet, so foundations go down and full basements are the standard regional build rather than the exception. The established stock on the numbered grid around Main Street, the historic and mid-century homes with mature trees and city water and sewer, often carries a finished basement that already doubles the living space, and adding a second kitchen and a private entrance to that kind of full basement is exactly the conversion these listings describe. An attached mother-in-law suite turns up more often in the larger floor plans on the newer subdivision streets, and on the sloped lots toward the valley edges a daylight or walkout lower level can open to grade with full windows and a real door. A fully detached casita is the rarest shape here, since it takes a lot with room for a second structure, so the acreage and valley-fringe parcels are the natural place to find one, and it is a find rather than an expectation. Richfield is also the service center for a wide region, with the Snow College branch campus and Intermountain Sevier Valley Hospital both in town, and that steady housing demand is part of why a separate suite gets built and listed here. Treat that as demand for the property type and a zoning-and-permit question, not as anything about who would live there.

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 detached structure 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. The two questions that decide everything are whether the unit is permitted with Richfield City 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 put 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. If a true separate suite is the goal, the older-core homes and the larger newer floor plans are the natural hunting ground, so the single-story page and the two-story page are useful next stops. If you only want the extra square footage and not a second kitchen, the homes with a basement page is the wider search, a different intent than this one. Earlier in the process than show me listings? Start with the Richfield guide, and when a home below reads right, that is the moment to reach out.