Live Tremonton listings, filtered
Homes with an ADU or casita in Tremonton.
Tremonton listings with an accessory dwelling unit, whether that is a basement apartment, an attached mother-in-law suite, or a detached casita, fed straight from the MLS and sorted newest first, with a clear read on what makes one legal here and what to verify before you write an offer.
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Want it narrower? Tell me your exact spec.
Newest first
The newest ADU and casita listings.
Fed straight from the local MLS and filtered to homes that note an accessory dwelling unit, whether that is a basement apartment, an attached mother-in-law suite, or a detached casita: new Tremonton listings appear here as they list, and sold homes drop off. The read on what makes one legal is just below.
Buying here
Sort legal from existing before you tour.
The word that matters most here is permitted: an accessory unit, whether a basement apartment, an attached suite, or a detached casita, only counts as legal if the separate entrance, kitchen, and egress are legally recognized by Tremonton City, not just built. Tell me what setup you need and I will have the Tremonton-area partner agent I work with pull the permit history on any home you flag.
Selling here
Own a Tremonton home with a documented accessory unit?
Buyers on this page want a basement apartment, attached suite, or casita with the permits and the egress to back it up. List it with the Tremonton-area partner agent I connect you with and it goes in front of exactly that search.
Listing information comes from the local MLS and is deemed reliable but not guaranteed.
The local read
What an accessory dwelling really means in Tremonton.
An accessory dwelling is a property feature, not a promise. On a Tremonton listing it usually means a basement apartment: a lower level built out as a self-contained living space with a second kitchen, its own bathroom, a separate exterior entrance, and sometimes a separate utility meter. An attached mother-in-law suite is the same idea built into the main or upper floor of a larger home, and a fully detached casita is a separate small structure of its own. The words move around, but the search shows up for the same honest reasons across northern Utah, multigenerational living under one roof and a separate suite where the unit is legal, and both turn on the same homework, which is whether the space is actually permitted.
Tremonton is reasonable ground for this search for a simple structural reason, and the form it takes here is mostly the basement apartment. This is a cold-climate northern-Utah town on the flat floor of the Bear River Valley at about 4,300 feet, so foundations go down below the frost line and full basements are the regional norm rather than the exception. The established stock on the historic grid around Main Street, the older 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. The newer single-family subdivisions filling the city edges build full basements too, and the larger floor plans among them are where an attached suite is most likely. A fully detached casita is the rarest of the three here: this valley-floor town has no shortage of land, but a genuinely separate structure still takes a lot with real room for it, so treat one as a find on an acreage or valley-fringe parcel rather than an expectation anywhere in town.
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 small 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 Tremonton 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, and the older established lots on the no-HOA page often have the room and the freedom for a separate entrance. If you only want the extra square footage and not a second kitchen, the all-listings page is the wider search. Earlier in the process than show me listings? Start with the Tremonton guide, and when a home below reads right, that is the moment to reach out.
What counts as an accessory dwelling
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The form it takes: in Tremonton most of these are basement apartments, since full basements are the regional norm. Attached mother-in-law suites turn up in the larger newer floor plans, and a detached casita is rare in a town this size, so read the listing for where the space actually sits.
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Second kitchen: a full or kitchenette setup downstairs is the core marker. A finished basement with no kitchen is just finished space, not a separate unit, so read the listing for the actual lower-level layout.
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Separate entrance: the second front door of the page title. A private exterior entry, often a walk-down or a side door, is what makes the lower level usable as its own space rather than a through-the-house extension.
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Separate egress: every sleeping room below grade needs a code-sized window well or a door to the outside. This is a safety item and a legality item at once, and it is the first thing to confirm in person.
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Separate utilities: some units have their own gas or electric meter, or at least split HVAC. It is a convenience, not proof of legality, so note it but do not read it as a permit.
The local map
Where the accessory units actually are.
Homes with a second living space turn up across Tremonton, but the forms concentrate in a few patterns, and the basement apartment is by far the dominant one. Here is where to look, and the due-diligence note attached to each.
The historic Main Street grid
The original numbered blocks around Main Street hold the oldest housing stock in town, on city water and sewer with mature trees. These older and mid-century homes are the most likely place to find a finished basement deep enough for a separate suite, and also the most likely place to find one that was finished without a permit, so it is the area where verification matters most.
The newer subdivision streets
The waves of newer single-family subdivisions filling the city edges build full basements on city services, and some are finished as separate living space; the larger floor plans among them are the likeliest place to find an attached suite. A newer build is more likely to have been finished with permits, which makes the paperwork cleaner, but you still confirm the unit's status and the egress rather than assume.
Flat valley floor, not a bench
Tremonton sits on the flat floor of the Bear River Valley, without the sloped bench that gives some Utah cities a natural walkout lot. Expect a full basement below grade, lit by egress windows, almost everywhere in town; a daylight or true walkout lower level is the occasional exception on a lot an owner has built up or graded, not a district to search for by geography.
Larger floor plans on bigger lots
The bigger homes, more common on the newer streets and the larger established lots, often have the deepest and tallest basements, which makes a comfortable second kitchen and a real bedroom downstairs more workable than in a low older basement. Stand in the space and check the ceiling height before you count on it.
Acreage and valley-fringe homes
Out on the farm-country edge, acreage homes on wells and septic sometimes carry a separate lower-level living space, and this is also the one setting in town where a genuinely detached casita has room to sit, since it takes a lot with real space for a second structure. Here the water and septic questions stack on top of the apartment questions, so verify what serves the parcel and what conveys alongside the unit's legal status. The acreage page goes deeper on that.
Twin-city Garland and Elwood edges
Tremonton blends into Garland about two miles north and Elwood just west along the business loop, and the same older-and-newer mix carries across those edges. Wherever the listing actually sits, the legality test is identical: confirm the unit is permitted with the right city for that parcel, and confirm the egress on every bedroom below grade.
Before you tour: what to actually check
Is it permitted: ask the listing agent for the permit history and confirm the unit's status and zoning with Tremonton City. A second kitchen and a side door do not make a unit legal on their own, and what is allowed depends on the parcel.
Egress on every bedroom: each sleeping room below grade needs a code-sized egress window and well, or a door to the outside. Look at the actual window wells, not just the listing photos.
Conforming vs. existing: many older basement apartments are non-conforming, finished before today's rules or without permits. Understand exactly what you are buying and what can and cannot be relied on.
Separate systems: check whether the kitchen, HVAC, and any meter are genuinely separate, and whether the wiring and gas work for the second kitchen were done to code and inspected.
Ceiling height and light: an older basement can be low. Stand in it. Tall, daylight, or walkout lower levels live very differently from a short, fully below-grade basement.
Water, septic, and the rest: in town confirm the city water and sewer bill, and on any acreage or fringe home check the well, septic, and what conveys. On any lot sitting low near the Bear River or a valley drainage, check the current FEMA flood-map status before you rely on the basement at all, then on any older home date the roof, furnace, electrical panel, and sewer lateral.
Want a real accessory dwelling without the guesswork?
Tell me your budget, the part of Tremonton you like, whether you want a basement apartment, an attached suite, or a detached casita, and whether you need a fully permitted, conforming unit or are open to an existing space you would verify and possibly bring up to code. I will connect you with a trusted Tremonton-area partner agent for the on-the-ground work and stay on the file for the homework and the financing, with straight answers about which spaces are legal units and which are just finished basements with a door.
Selling a Tremonton home with a basement apartment, a casita, or an attached accessory suite? The buyers reading this page want exactly that. List it with the Tremonton-area partner agent I connect you with, and your home gets featured across MovingUtah, on the pages they are already reading.
Quick answers
ADU and casita shopping, answered.
It is a secondary living space that can function on its own, and Tremonton listings use a few different words for it. The most common form here by far is a basement apartment, a lower level built out with a second kitchen, its own bathroom, and a separate exterior entrance. An attached mother-in-law suite usually means a similar setup on the main or upper floor of a larger home, and a fully detached casita is the rarest of the three, since it takes a lot with real room for a second structure. All three are property features describing the space, nothing more. The big thing to know is that a second kitchen and an outside door do not make a unit legal on their own, so the real work is confirming whether it is permitted and conforming with Tremonton City and what the specific parcel's zoning allows.
Some are and some are not, which is exactly why you verify rather than assume. An accessory dwelling has to be permitted with Tremonton City to be treated as a separate dwelling, what is allowed depends on the parcel's zoning, and many existing basement apartments and converted suites in older homes were finished over the years without permits or were built before today's rules, so they are non-conforming. That is not a dealbreaker by itself, but you need to know which one you are buying. Confirm the zoning, the permit history, the unit's status, and the egress independently before you rely on it, and I will help line up those checks.
Most often in the older Main Street grid, the historic and mid-century homes on city water and sewer that sit over the town's deepest finished basements, and that is where most of the basement apartment conversions turn up. Larger floor plans on the newer subdivision streets and on bigger established lots can carry an attached suite as well. A fully detached casita is the rarest of the three here, since it takes a lot with genuine room for a second structure, so it shows up occasionally on acreage and valley-fringe parcels rather than anywhere in town. The live listings above are the honest count on any given week.
Only where the unit is legal, and that is the whole point of the verification. A permitted, conforming accessory dwelling is a different thing from a non-conforming space that happens to have a kitchen, and the rules around accessory dwellings and rentals can change and depend on the parcel's zoning, so this is a question to confirm with Tremonton City for the specific property, not to assume from the listing. I will not put a rent figure on a page like this, because it depends entirely on the unit's legal status and the specifics, but I can connect you with a local agent who will get you straight answers on what the city allows.
Egress is a legal, code-sized way out of every below-grade sleeping room, usually an egress window with a window well sized for a person to climb out, or a door to the outside. It is both a safety requirement and a piece of what makes a basement bedroom or apartment count as legal living space. It matters most for the basement apartment conversions that make up most of this search, and it is the first thing to confirm in person, because a room marketed as a bedroom downstairs is not really one without it. We check the actual window wells, not just the photos.
Tell me the budget, the part of town, and whether you need a fully permitted suite or are open to an existing space to verify, and I will connect you with a Tremonton-area partner agent and flag matching listings as they go live. Pair that with a conversation about your plan so you are ready to move when the right separate-suite home lists, since these are a narrow slice in a smaller market and they do not sit long.