Does Utah's new ADU law let you build a backyard rental in Daybreak? Not exactly. Utah's SB284 requires South Jordan to open the door to detached accessory dwelling units statewide, but Daybreak's own community rules only allow an ADU built above a garage, not a freestanding guesthouse in the yard.
If you've seen headlines this year about Utah's new "backyard home" law, you've probably already run the math in your head: extra rental income, a place for aging parents, maybe a way to offset your mortgage. That math is real in a lot of Utah cities right now. In Daybreak, it works a little differently, and knowing the difference before you start planning saves you a permit application and a conversation with the city that goes nowhere.
We get asked about this often enough that it's worth laying out plainly: what the state actually changed, what South Jordan already required before the law existed, and where Daybreak's own rules narrow the path.
What Utah's SB284 Actually Requires
SB284, passed during the 2026 general session, requires every Utah city with a population of 5,000 or more to permit detached accessory dwelling units (DADUs). Cities that didn't already have an ADU ordinance on the books have until October 2026 to adopt one.
A few things the law does, and doesn't, do statewide:
You get one ADU per lot, either internal or detached, not both, and it can't be sold off as a separate unit from the primary home. Beyond that baseline, cities keep control over the details: setbacks, height limits, size caps, parking requirements, owner-occupancy rules, and design standards are still a local decision. SB284 sets a floor, not a single statewide rulebook.
South Jordan's Existing ADU Rules (And Why Daybreak Is Different)
South Jordan isn't starting from zero here. The city's ADU code, found in Municipal Code 17.130.030, already covers two types of units: internal accessory dwelling units (IADUs), built within the footprint of the home, and guesthouses, which are detached structures with their own kitchen and bathroom.
The existing South Jordan rules include:
A minimum lot size of 14,520 square feet for a detached guesthouse, though the Planning Commission can approve a conditional use permit for lots that don't meet this. The property owner is required to live on-site as their legal residence. At least one off-street parking space is required, and it can't take the place of parking already required for the main house. Exterior doors visible from the street aren't allowed. Rentals must run 30 days or longer, so short-term rentals are off the table for internal ADUs.
Here's the part that's easy to miss: within Daybreak specifically, ADUs are only permitted above a detached or semi-detached garage. Not in the side yard. Not as a standalone casita behind the pool. If your Daybreak lot doesn't have (or can't support) a detached or semi-detached garage with room to build above it, the freestanding guesthouse option that works in other South Jordan neighborhoods isn't available to you the same way.
What This Means If You Actually Live in Daybreak
For most Daybreak lots, this narrows the realistic path to one option: a garage-top unit, sometimes called a carriage apartment or garage apartment, built above an existing or new detached garage.
That's worth knowing before you fall in love with a Pinterest board of backyard cottages. It's also worth knowing that South Jordan's current 14,520-square-foot minimum lot size sits well above the 11,000-square-foot threshold that opened up ADU eligibility for homeowners in a lot of other Utah cities under SB284. Since South Jordan already has an ordinance in place, it isn't required to loosen anything to comply with the October 2026 deadline. But cities across the state are actively revisiting their ADU codes this year, and it's reasonable to expect South Jordan to review its own rules, including the Daybreak-specific garage requirement, at some point in that process. If you're weighing whether to build now or wait, that's a conversation worth having with the city's Planning Department directly.
What It Costs, and What It Could Add
Statewide, ADU construction costs in 2026 vary widely by type. A basement conversion runs roughly $50,000 to $100,000. A garage conversion, the path most relevant to Daybreak, typically lands between $80,000 and $150,000. A ground-up detached unit, where cities allow it, usually costs $200,000 to $350,000 for 600 to 800 square feet with mid-range finishes.
On the income side, ADUs across the Salt Lake City area are renting for roughly $1,200 to $2,500 a month depending on size and finish level, often covering a meaningful chunk of a mortgage payment. A well-built ADU can also add somewhere in the range of $150,000 to $200,000 in home equity, though property taxes typically rise 15 to 30 percent of the added value alongside it. For most owners, rental income offsets that tax increase several times over.
None of that is guaranteed, and your actual numbers depend on your lot, your garage, and your budget. But it's the range worth having in mind before you call a contractor.
Before You Build: Permits and Planning
Every ADU in South Jordan, internal or detached, needs Planning Department approval before anyone moves in. That means a site plan and floor plan drawn to scale, submitted before construction starts, not after. If you're in Daybreak, confirm with the city that your specific garage setup qualifies before you spend money on architectural drawings.
FAQ
Can I build a backyard ADU in Daybreak? Not a freestanding one under current rules. Daybreak only permits accessory dwelling units built above a detached or semi-detached garage, unlike other South Jordan neighborhoods where a standalone guesthouse may be an option.
How big of a lot do I need for an ADU in South Jordan? The city's baseline is 14,520 square feet for a detached guesthouse, though the Planning Commission can approve smaller lots through a conditional use permit. Daybreak lots are further limited to the garage-apartment option regardless of size.
How much rental income can an ADU generate in South Jordan or Daybreak? Recent data across the Salt Lake City area puts ADU rents at roughly $1,200 to $2,500 a month, depending on size and finish, which can offset a significant portion of a mortgage payment.
