Live Grantsville listings, filtered
Homes with an ADU or casita in Grantsville.
Grantsville listings with an accessory dwelling unit, whether that is a basement apartment, a detached casita on a bigger lot, or an attached mother-in-law suite, 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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- Grantsville, UT
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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, a detached casita, or an attached mother-in-law suite. New Grantsville 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.
A finished lower level with a second kitchen and a side door is not automatically a legal unit here, so the permit history and the parcel's zoning are what actually decide it. Tell me whether you want a basement apartment, an attached suite, or a detached casita on a bigger lot, and I will have the Grantsville-area partner agent I work with pull the permit history on any home you flag.
Selling here
Own a Grantsville home with a documented accessory unit?
Buyers on this page want a basement apartment, an attached suite, or a detached casita with the paperwork behind it, not just a finished room with a kitchen. List it with the Grantsville-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 Grantsville.
An accessory dwelling is a property feature, not a promise. On a Grantsville 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 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 with the city.
Grantsville is reasonable ground for this search, and it is one of the few Wasatch-area towns where more than one form of it is realistic. This is a cold-desert climate, so foundations go down and basements are the norm across both the historic Main Street core and the newer subdivisions, which makes the basement apartment the most common shape here. But this is also a rural, larger-lot town with acreage on its edges, and that is exactly the ground a detached casita or a converted outbuilding needs to sit on, which a built-out valley city rarely has. The layout tends to appear in the larger homes built over full basements, the bigger newer custom and two-story plans with the depth and ceiling height to fit a real second kitchen and a bedroom with proper egress, in some of the larger older homes near the pioneer grid that have been finished out over the years, and on the bigger subdivision and acreage parcels where a separate structure has room to stand apart from the main house.
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. The two questions that decide everything are whether the unit is permitted with Grantsville City and whether it has its own legal egress, meaning a code-sized window well or door out of every below-grade sleeping room. What a given zone allows for an accessory or second living unit varies parcel by parcel, so the permit status and the zoning are confirmed for the specific property, in writing, before you rely on the space.
I will not put a rent number or a payment number on a page like this, and that is deliberate. What a separate unit could do depends entirely 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. Because the larger homes are where these layouts live, the bigger floor plans on the two-story page often carry the deepest lower levels, while the larger ramblers on the single-story page can put a private grade-level entrance just steps down. If you only want the extra square footage and not a second kitchen, the homes with a basement page is the wider search, and because a detached casita or a separate entrance needs room and few shared-community rules over it, the open lots on the no-HOA page and the acreage page pair naturally with this one. Earlier in the process than show me listings? Start with the Grantsville 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 Grantsville most of these are basement apartments, since basements are the norm in this climate. An attached mother-in-law suite turns up too, and a detached casita is realistic here because the bigger lots and acreage have room for one, so read the listing for where the space actually sits.
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Second kitchen: a full or kitchenette setup is the core marker. A finished basement or a spare suite with no kitchen is just extra space, not a separate unit, so read the listing for the actual layout.
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Separate entrance: the second front door this search is really about. A private exterior entry, often a walk-down, a side door, or the door of a detached casita, is what makes the space usable on its own rather than a through-the-house extension.
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Separate egress: every below-grade sleeping room 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 Grantsville, but the forms concentrate in a few patterns: the basement apartment in the larger-home stock, and the detached casita where a bigger lot or acreage has room for it. Here is where to look, and the due-diligence note attached to each.
The larger newer custom and two-story homes
The bigger floor plans in the 2000s-to-2020s subdivisions, places like Anderson Ranch and Springfield Estates, sit over full basements with the depth and ceiling height to fit a real second kitchen and a proper bedroom downstairs. A newer build is more likely to have been finished with permits, but you still verify it, and you confirm what the parcel's zoning allows for a second unit.
Larger older homes near the pioneer grid
Some of the larger homes near the historic Main Street core have been finished out over the years, and a full basement under an older home can hold a separate living space. This is also the most likely place to find a unit that was finished without a permit, so it is the area where verification matters most, alongside dating the roof, furnace, electrical, and sewer or septic.
Acreage homes with room for a detached casita
On the larger lots toward the edges of town, a home over a full basement can carry a separate lower-level space, and the acreage gives it real separation. This is also the ground a detached casita or a converted outbuilding actually has room to stand on, which a built-out valley city rarely offers. The water and zoning homework that comes with acreage applies here too, so confirm the parcel's culinary source, any septic, and what the zone allows for a second structure or accessory unit.
Homes on the more open, less-restricted parcels
A separate lower unit pairs naturally with the flexibility of an open parcel, because a shared-community arrangement can limit a second living unit even where the city allows it. The more open lots are the ones worth chasing for this, which is why this page and the no-HOA page share some ground. Confirm there is no private restriction that overrides what the city permits.
Walkout and daylight basement lots
On the parcels with enough grade, a lower level can open to daylight with full windows and a real door, which is the ideal setup for a separate suite that lives like its own floor rather than a dark basement. These are less common in a flat-valley town but worth watching for, since a walkout makes the egress and the entrance question much easier to satisfy.
The bigger floor plans, wherever they sit
More than the neighborhood, the marker is the size of the home and the depth of the basement, since a comfortable second kitchen and a real bedroom need room that a short older basement does not have. The larger plans across both the cores and the subdivisions are where these layouts work, so read the lower-level square footage and ceiling height on each listing rather than the address.
Before you tour: what to actually check
Is it permitted and zoned for it: ask the listing agent for the permit history and confirm the unit's status and what the parcel's zoning allows with Grantsville City. A second kitchen and a side door do not make a unit legal on their own, and what is allowed varies parcel by 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 accessory units, whether a basement apartment or a converted outbuilding, 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, sewer, and the rest: Grantsville parcels vary between city sewer and septic on the fringe, and the city runs a separate secondary irrigation system, so check what the property has, and on any older-core home date the roof, furnace, electrical panel, and sewer or septic system.
Want a real accessory dwelling without the guesswork?
Tell me your budget, the part of Grantsville you like, whether you want a basement apartment, an attached suite, or a detached casita on a bigger lot, 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 Tooele-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 Grantsville home with a basement apartment, a casita, or an attached accessory suite? The buyers reading this page want exactly that. List it with the Grantsville-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 the listings use several words for it. In Grantsville the most common form is a basement apartment, a lower level built out with a second kitchen, its own bathroom, and a separate exterior entrance. A casita usually means a detached unit set apart from the main house, which a larger Grantsville lot or an acreage parcel actually has room for, and a mother-in-law suite usually means an attached accessory apartment on the main or upper level. All of them 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 Grantsville 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 Grantsville City to be treated as a separate dwelling, what is allowed depends on the parcel's zoning, and many existing basement apartments, converted suites, and outbuilding conversions 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 larger newer custom and two-story homes over full basements, where there is the depth and ceiling height for a real second kitchen and a proper bedroom downstairs, and in some of the larger older homes near the historic Main Street grid that have been finished out over the years. The detached casita is the rarer form, and it turns up where it has room to sit, on the bigger subdivision lots and the acreage parcels toward the edges of town. Basements are the norm in this climate, so the marker is the size of the home and the lot more than the neighborhood. 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, the rules around accessory dwellings and rentals can change, and what is allowed depends on the parcel's zoning, so this is a question to confirm with Grantsville 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 on the basement units that make up much 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 Tooele-area partner agent and flag matching listings as they go live. Pair that with a conversation about financing so you can move when the right separate-suite home lists, since these are a narrow slice in a town this size and the real ones do not sit long.