Garage Conversion ADUs in Bountiful, UT
Turning an attached or detached garage into a self-contained living unit — working with the slab, structure and utilities your property already has.
No obligation. Every estimate starts with a straightforward conversation and a walkthrough of your lot.
Why Garage Conversions Work Well in Bountiful
A garage conversion is usually the shortest distance between a homeowner and a finished ADU. The foundation is poured, the walls are standing, the roof is on, and there is normally electrical service already running to the structure. Most of the expensive early work is done.
That matters here because so many Bountiful homes have a garage worth converting. Older properties near the original downtown and along the east bench frequently have detached garages set back in the lot — the kind of building that becomes a genuinely private unit once it is insulated and finished. Newer west-side homes more often have attached garages, which convert into an in-law suite with its own entrance.
What you give up is parking and storage, and that is the trade worth thinking hardest about. A converted garage cannot be un-converted cheaply. If the driveway or street parking will not absorb the loss, the conversion may create a daily annoyance that outlasts the excitement of the new space.
Where the trade works, the result is a unit that costs less and finishes sooner than an equivalent detached ADU, on a footprint the property has already committed to.
What will converting the garage cost?
A 750 sq ft garage conversion lands around $138,000 – $182,000 all in. Whether the garage is attached matters more than most people expect: attached counts as an internal ADU under Utah Code 10-21-303 and pays no impact fee.
What a Garage Conversion Involves
Slab condition and level, wall framing, ceiling height, roof structure, and whether the existing electrical service and any nearby plumbing can support a full living unit.
Insulating walls, roof and often the slab, replacing the garage door opening with a proper wall and entrance, adding windows for light and egress, and bringing the envelope up to a comfortable standard.
Running plumbing to a new kitchen and bathroom, upgrading electrical and adding heating and cooling, then flooring, cabinetry, fixtures and paint through to a finished unit.
The Advantages of Converting Rather Than Building
For the right property, converting is the more sensible route on almost every measure:
- Lower cost — no excavation, no new foundation, no new roof structure, and often a shorter utility run
- Shorter timeline — the shell exists, so the project starts much further along
- Less disruption to the yard — no heavy equipment cutting across the lawn to reach a build site
- Backyard space preserved — a detached unit consumes yard; a conversion uses a footprint already given over to a building
- Simpler access logistics — a real advantage on older streets where a narrow side yard limits what can reach the back of the property
The counterweight is that you inherit whatever the existing structure gives you. Ceiling height, wall positions and slab quality are what they are, and working around them is part of the design problem rather than something you can specify away.
How a Garage Conversion Runs
1. Garage Assessment
We look at the slab for cracking and level, check wall framing and ceiling height, examine the roof structure, and trace what electrical and plumbing service is already nearby.
2. Layout Planning
Designing a full living unit inside fixed dimensions — where the kitchen, bathroom, sleeping area and entrance go, and how to get natural light into a building originally designed without much.
3. Permitting & Estimate
Drawings prepared and the local approval process worked through, with a project-specific estimate based on what the assessment actually found.
4. Structural & Envelope Work
Closing in the garage door opening, framing the new entrance and window positions, and correcting anything the assessment flagged in the walls, slab or roof.
5. Insulation & Systems
Insulating walls, ceiling and often the slab, then running plumbing, upgraded electrical and heating and cooling through the opened structure.
6. Interior Finishes
Drywall, flooring, kitchen and bathroom installation, fixtures, trim and paint, ending with a walkthrough before handover.
What to Check Before Converting Your Garage
Not every garage is a good candidate. These are the factors that decide it:
- Ceiling height — a garage built with a low ceiling can become uncomfortable once insulation and finished flooring eat into it
- Slab condition and level — significant cracking, settling or a slab pitched hard toward the door adds cost before anything else starts
- Utility proximity — a detached garage at the back of a long lot needs a longer plumbing and sewer run than one attached to the house
- Where the parking goes — decide this honestly before you commit, not after
- Attached versus detached — an attached conversion shares a wall with the house and needs proper separation; a detached one gives more privacy but its own utility runs
- Local rules — Utah law makes internal ADUs a permitted use in most residential zones, but a detached garage conversion sits under city ordinance and should be confirmed with Bountiful City
If the assessment shows the garage is not the right candidate, the usual alternatives are a basement conversion or a purpose-built detached unit. Either way it starts with design work grounded in the actual property. We convert garages across Bountiful, Woods Cross, North Salt Lake, Centerville and the wider South Davis area.
Garage Conversion Questions
Can a garage conversion include a full kitchen and bathroom?
In most cases yes, and that is what makes it a true ADU rather than a finished room. The deciding factors are how far the garage sits from existing water and sewer service and whether the slab can be cut for drainage. Both are checked during the assessment, because a detached garage at the back of a deep lot is a different proposition from one attached to the house.
Will I lose my garage permanently?
Practically, yes. Reversing a conversion means removing the kitchen and bathroom, re-opening the wall for a garage door and undoing the insulation and finishes — technically possible but rarely worth it. Decide about parking and storage before you start, not after.
Is the ceiling in my garage high enough?
Garages are usually built with adequate height, but once you add insulation to the ceiling and finished flooring over the slab, some of it disappears. We measure this at the assessment. If the height is marginal, there are sometimes options in how the ceiling is insulated, and sometimes the honest answer is that the garage is not the right candidate.
Does the slab need to be replaced?
Usually not. Minor cracking is normal and can be worked with. Significant settling, heaving or a slab pitched steeply toward the door is a different matter and adds real cost. This is one of the first things we look at, because it is the item most likely to change the budget.
Can an attached garage conversion have its own entrance?
Yes, and it should. A separate entrance is part of what makes the unit self-contained rather than an extension of the house. On an attached conversion we also plan proper separation between the unit and the main home, which matters for privacy, sound and function.
How does a garage conversion compare on cost to a detached ADU?
A conversion is generally the less expensive route, because there is no excavation, no new foundation and no new roof structure. The gap narrows if the garage needs significant structural correction or sits a long way from utility service. We give you the comparison honestly once we have seen the building.
Wondering If Your Garage Will Work?
Send us the address and a couple of photos of the garage inside and out. We will walk it with you and tell you what it can realistically become.
Convert Your Garage Into a Real Living Space
A garage conversion is often the fastest and least expensive route to a finished ADU — when the building is the right candidate.
We assess the structure honestly, design a layout that works inside its real dimensions, and build it through to a self-contained unit with its own kitchen, bathroom and entrance.
Every project starts with a walkthrough of the actual garage. No obligation, and no pressure to commit before you know what it will take.