By the Utah ADU Builders Editorial Team · Last verified: July 2026 · Review scheduled before October 1, 2026.
Taylorsville ADU Builders: What You Can Build, What It Costs, and Who to Hire
Yes — you can build an ADU in Taylorsville, but the right path depends on your lot and whether you plan to rent. Today, the clear route is an internal ADU (a separate living space created inside your existing home, like a basement apartment) on a lot of at least 6,000 square feet, rented only for stays of 30 days or longer, with owner occupancy and a business license. A rentable detached backyard unit isn't a standard path yet — but a new Utah law opens one for lots of 11,000+ sq ft starting October 1, 2026.
This guide is most useful if you're comparing Taylorsville ADU builders and own a detached single-family home — weighing a basement conversion, an addition, a prefab unit, or a future backyard cottage. It's not a promise that you can rent both your house and an ADU while living elsewhere, run a nightly rental, build without permits, or drop a tiny home in the yard automatically.
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Taylorsville ADU paths at a glance: now vs. October 1, 2026
Here's the fastest way to see where your project stands. "Permitted use" means a use the city must allow by right, without a special case-by-case approval. A "conditional use permit" is a case-by-case approval.
| The project you're considering | Status as of July 2026 | Can you rent it? | First thing to confirm |
|---|---|---|---|
| Internal / basement ADU (inside your home) | Established path now — lot ≥ 6,000 sq ft | Yes — 30-day-minimum rentals, owner-occupied | Do your home, lot, parking, and space meet current rules? |
| Attached addition (new space attached to the home) | Gray area — must be classified for your specific project | Depends on classification | How will Taylorsville classify a new attached footprint? |
| Detached ADU (standalone backyard unit) | Opens Oct 1, 2026 on lots ≥ 11,000 sq ft; local standards still being written | Yes — long-term; local terms pending (see below) | Does your lot, site access, and utility route support it? |
| Prefab / modular unit | Same future detached path — not a shortcut around permits | Same as detached | What's the full installed cost, not just the unit price? |
| Guesthouse (Taylorsville's current detached option) | Allowed now on lots ≥ 15,000 sq ft, by conditional use permit | No — guests only, cannot be rented | Is non-rental guest use actually your goal? |
Based on Taylorsville City Code § 13.11.010 and Utah Code §§ 10-21-303 and 10-21-304. State law sets a floor; Taylorsville's local detached-ADU standards and your property's specific conditions still control the final answer.
Does Taylorsville allow ADUs right now?
Taylorsville allows accessory dwelling units, but it treats units inside your home very differently from detached backyard units. An ADU (accessory dwelling unit) is a second, smaller home on the same lot as your main house. Today, Taylorsville's proven route is an internal ADU — a self-contained living unit built within your home's existing footprint, such as a finished basement apartment with its own entrance and kitchen. A standalone backyard unit is not a standard rentable-dwelling path today; that category opens October 1, 2026, on lots of at least 11,000 square feet under a new state law. Taylorsville does allow a "guesthouse" (a detached unit on a lot of at least 15,000 sq ft, by conditional use permit) — but a guesthouse cannot be rented.
A common misconception is worth clearing up early: many homeowners hear that "Utah legalized ADUs" and assume any type is allowed anywhere. That's not how it works. Utah law protects certain ADUs, but the specific rules — lot size, rental terms, parking, setbacks, owner occupancy — still vary city by city, and Taylorsville is no exception.
Learn more: How Utah's ADU laws work statewide.
What are Taylorsville's current ADU rules?
For an internal ADU today, Taylorsville requires a detached single-family home on a lot of at least 6,000 square feet, one added off-street parking space, owner occupancy, and a business license before the unit can be occupied. The unit can be rented, but only for stays of 30 days or longer, and it can't have a separate utility meter or its own mailing address. A building permit is required, and the unit must meet current building, health, and fire codes.
Here are the core current requirements for an internal ADU, drawn directly from Taylorsville City Code § 13.11.010:
| Requirement | What the code says today |
|---|---|
| Home type | Must be inside the footprint of a detached single-family home (not a duplex, triplex, or multi-unit building) |
| Minimum lot size | 6,000 square feet |
| Number of ADUs | One per lot |
| Parking | One additional off-street space, beyond what the main home needs |
| Rentals | Allowed, but 30 consecutive days or longer — no short-term (nightly/Airbnb) rentals |
| Owner occupancy | Required; you provide proof by submitting two of eight accepted documents (e.g., a current mortgage statement, property-tax notice, or Utah vehicle registration) |
| Business license | Required before occupancy, kept active while the ADU exists, and re-authorized by the new owner if you sell |
| Utilities & address | No separate utility meter and no separate mailing address |
| Construction | Building permit required; separate living facilities, a code-compliant entrance and bedroom egress, fire separation, and interconnected smoke/CO detectors. The code also requires a written statement from a licensed HVAC professional confirming the system is sufficient for both the ADU and the main home |
Source: Taylorsville City Code § 13.11.010(B).
"Owner occupancy" simply means the property owner lives on the property. "Setback" means the minimum distance a structure must sit from your property lines.
A note on attached additions. A new addition that expands your home's footprint sits in a gray area. Taylorsville's adopted code says an internal ADU must be created within the home's existing building footprint, while city planning staff have described the current internal-ADU category as including attached additions (March 2026 Planning Commission minutes). Those two don't fully line up, and the detached-ADU rules below don't apply until October. So if you're considering an addition, get a classification ruling from Taylorsville's planning staff in writing before you invest in design — don't assume it follows internal-ADU rules or that it's automatically blocked.
Learn more: planning a basement or internal ADU.
Can you rent an ADU in Taylorsville?
Yes — but only certain types, and only for longer stays. A current internal ADU can be rented for 30 days or more if you live on the property and hold a business license. A "guesthouse" (Taylorsville's current detached option) cannot be rented at all. Short-term rentals — stays under 30 days, the Airbnb model — are not allowed for ADUs.
Looking ahead, the detached-ADU path opening October 1, 2026 creates a rentable detached unit — but the specific terms are set locally and aren't final. Don't assume the internal 30-day rule carries over: state law lets Taylorsville require detached-unit rentals to be 90 consecutive days or longer, and lets it require owner occupancy. Treat detached rental and occupancy terms as "to be confirmed" until the city adopts them.
If your plan depends on nightly-rental income, pause here — that's not a path Taylorsville's rules support, and it's better to know now.
Learn more: ADU rental-duration rules in Utah.
What changes for detached ADUs on October 1, 2026?
A 2026 Utah law (Utah Code § 10-21-304) requires larger cities — including Taylorsville — to allow a detached ADU as a permitted use on lots of at least 11,000 square feet that already have a single-family home, in residentially zoned areas where single-family homes are allowed, starting October 1, 2026. That's a real shift from today's non-rentable "guesthouse" path. But "permitted use" is not the same as "automatically approved" or "permit-free" — you still have to meet building, health, fire, and local land-use standards. Taylorsville is still developing its local detached-ADU standards; the exact numbers for setbacks, height, and size are not yet final.
What the state law requires of Taylorsville (and similar cities): it must allow a qualifying detached ADU without forcing you through a conditional use permit in a residentially zoned area, and it must provide a path to convert a legally built accessory structure — like an existing detached garage — into a detached ADU, subject to setbacks and building, health, and fire codes.
What Taylorsville can still decide for itself, within the law's limits: size, height, lot-coverage, and setback standards; a requirement that the unit's design match the main home; a rule that the detached unit be no larger than the main home; owner occupancy; parking (within state caps); and a longer rental minimum (up to 90 days). Because the city hasn't finalized these local standards yet, the exact numbers for Taylorsville aren't settled.
Why 11,000 square feet doesn't mean "yes" for your lot. Recorded lot size is only the entry ticket. Existing structures, setbacks, easements (a recorded right for someone else to use part of your land, such as a utility corridor), and whether nearby utilities have the access and capacity to serve a new unit can all rule out an individual property — or add significant cost. For scale: a preliminary March 2026 city-staff analysis identified roughly 2,050 existing Taylorsville parcels that would meet the 11,000 sq ft threshold — meaning a substantial number of lots will clear the size gate, but each still needs property-level review.
Our practical view: if you want a detached unit, you can start property screening, site investigation, and budgeting now — but don't buy final plans or count on a specific permit date until Taylorsville adopts its local standards and your site's utility and setback picture is clear.
Source: Utah Code § 10-21-304; Taylorsville Planning Commission minutes (March 24, 2026).
See what kind of ADU your property may support
Get a property-aware read on your likely path before you commit to design or estimates.
Learn more: Utah detached ADU rules and build paths · how ADU rules vary across Salt Lake County.
How much does a Taylorsville ADU cost?
There's no reliable Taylorsville price without a defined project type and a look at your property. As general Utah planning ranges — not quotes, and not promises — an internal/basement ADU is usually the least expensive, an attached addition costs more, and a detached new build costs the most. Your lot, utilities, site work, and finish level move the number more than anything else.
| ADU path | Utah planning range (estimate) | Taylorsville status | Biggest cost drivers |
|---|---|---|---|
| Basement / internal | $60,000 – $150,000+ | Established path where eligible | Entrance, bedroom egress, sewer depth, HVAC, electrical panel, fire separation, prior unpermitted work |
| Garage conversion | $60,000 – $175,000+ | Attached garage → today's internal-ADU rules; detached garage → the Oct 1 detached process | Slab, insulation, plumbing, HVAC, replacing lost parking |
| Attached addition | $150,000 – $275,000+ | Classification required (see above) | Foundation, roof tie-in, structure, utilities |
| Prefab / modular (installed) | $150,000 – $300,000+ | Future detached path where eligible | Site work, foundation, delivery/crane, hookups |
| Detached site-built | $200,000 – $400,000+ | Opens Oct 1, 2026 on qualifying lots | Foundation, full building shell, utility trenching, engineering, finishes |
These are planning estimates reconciled from current (2025–2026) Utah cost and builder sources — not individual contractor bids, and not Taylorsville quotes. A property-specific estimate becomes meaningful only after your project path, existing conditions, utilities, and site work are known. See our Utah ADU cost guide for the full methodology.
Why a basement conversion can still get expensive. "No separate meter required" does not mean no utility work. A utility hookup — connecting the unit to water, sewer, and power — can still involve a new electrical panel, added plumbing, sewer changes if the line sits below grade, or HVAC upgrades. Add a missing exterior entrance, inadequate egress, low ceilings, or moisture problems, and a "cheap" basement can climb fast.
Why prefab's sticker price isn't the finished price. A factory-built unit still needs an eligible site, a foundation, delivery and set, utility runs, permits, and finish work the manufacturer may not include. Compare the installed scope, not the unit package alone.
What these ranges don't include: exact city fees, unknown utility upgrades, financing costs, or any assumption about rental income or property-value gain — none of which we can responsibly estimate without your specifics.
Taylorsville ADU permits and licensing: what to expect
Expect two connected tracks: a building permit for the construction work, and a business license before you can occupy or rent an internal ADU. You'll need to show owner occupancy and meet building, fire, and health codes. Timelines depend on your project's complexity and the city's review, so plan around phases rather than a single number.
A realistic sequence looks like this:
Classify the project
Internal, attached, future detached, or guesthouse. This determines everything downstream.
Prepare plans and documentation
Typically a floor plan, site plan, existing-vs-proposed layout, and details for structure, electrical, plumbing, mechanical, egress, and fire separation, plus owner-occupancy proof for the license.
Submit for city plan review
The city reviews, may return correction comments, and you resubmit.
Build and pass inspections
Inspection stages depend on your scope and trade permits.
Complete licensing before occupancy
Obtain the business license, keep it active, and re-authorize it if you sell. The city may also record a notice on the property describing the ADU's permitted use.
On timing: Taylorsville's Building Department currently says to expect up to about 10 business days for a plan-review cycle, and resubmitting revised plans restarts that clock. Important: that's the plan-review step only — not your total approval, construction, inspection, or occupancy timeline, which depends on scope and your builder's schedule.
On fees: because a separate utility meter isn't allowed, a shared meter doesn't necessarily mean no extra utility costs. Depending on which provider serves your property (Taylorsville addresses are served by different water and sewer districts), you may still face additional-unit, capacity, hookup, or recurring charges — confirm current fees with your provider at application. One helpful point on cost: Utah law exempts an internal ADU built within your existing home from impact fees (a one-time fee some cities charge new development to fund infrastructure). That exemption is narrow — it doesn't waive building-permit or utility hookup fees, and it doesn't apply to detached units or additions. We don't publish specific fee figures here because they change and vary by property.
Sources: Taylorsville City Code § 13.11.010; Taylorsville Building Department (plan-review guidance). Learn more: Utah ADU permit process · what controls an ADU project timeline · Utah ADU owner-occupancy rules.
How do you compare Taylorsville ADU builders?
The best contractor for your project is the one whose current license, experience, and scope actually fit the build path — not whoever ranks highest for "ADU builder." Match the contractor to the work: an internal conversion, a structural addition, a detached new build, and a prefab installation are genuinely different jobs. And compare bids only after your project path is defined.
Match the contractor to the project
| Your project | What to look for in a contractor |
|---|---|
| Internal / basement ADU | Residential remodeling with plumbing/HVAC/electrical coordination, egress and fire separation, and experience working in occupied homes |
| Attached addition | Addition or design-build experience, foundation and structural coordination, roof tie-in, full permitting |
| Detached site-built | Residential new construction, site planning, utility trenching, foundation, full building envelope |
| Prefab / modular | Manufacturer coordination plus local site work, foundation, delivery/set, hookups, and clear ownership of permitting |
| Fixing unpermitted space | Assessment, documentation, and corrective work — without promising easy legalization |
Verify the license yourself — don't take a claim on faith. Utah contractors are licensed through the state (DOPL, the Division of Professional Licensing). Before you sign, verify the contractor's current license status and any disciplinary history through DOPL's official "Verify a License" tool (link in Sources): check the exact legal business name, active status, license number, and whether the classification matches your scope (residential new construction, remodeling, modular installation, etc.), plus current insurance. The correct license class depends on the actual work, so be skeptical of anyone who waves off licensing questions.
Ask for comparable work, not just remodeling photos. Good questions: Have you completed a permitted dwelling conversion or detached build? Who prepares the plans and handles permit corrections? Who verifies utilities? Can you explain what's excluded from the estimate? A contractor with comparable permitted Utah work is more valuable than one who invents a "Taylorsville project" to match your search.
Compare bids on the same lines. Put every estimate side by side on: scope; plans and engineering; permit prep and fees; demolition; site work and foundation; plumbing, sewer, electrical service, and HVAC; utility trenching; finishes and appliances; allowances; exclusions; contingency; the change-order process; payment schedule; construction window; and warranty. Utah's licensing division publishes an optional residential construction agreement you can use as a reference (link in Sources) — not legal advice, just a starting framework.
Get a local ADU estimate path
Start with your project type and property facts so the options match the work you're actually considering.
Learn more: how Utah ADU builder matching works · garage conversion feasibility and costs.
What can block or delay a Taylorsville ADU?
The common dealbreakers aren't the word "ADU" — they're property type, lot size, owner occupancy, parking, egress, utilities, easements, prior unpermitted work, and a goal that conflicts with the rental rules. Catching one of these before plans or bids is exactly the point of a feasibility check.
| Potential blocker | Why it matters | What to do |
|---|---|---|
| Property isn't a detached single-family home | The current internal path is limited by home type | Consider a different remodel/housing path |
| Lot below the size threshold | May not meet current internal (6,000 sq ft) or future detached (11,000 sq ft) minimums | Confirm recorded lot size before estimating |
| Owner won't live on the property | Owner occupancy is required today | The current rentable-ADU path likely won't apply |
| Not enough off-street parking | Internal ADUs require an added space | Plan where the extra space goes |
| No compliant entrance or bedroom egress | Life-safety and construction cost issue | Budget for it; it's rarely trivial |
| Garage is the only access route | Code bars required entry through a garage | Design an alternative entrance |
| Electrical, HVAC, or sewer limits | Can sharply expand scope and cost | Expect lower estimate confidence until reviewed |
| Existing basement work is unpermitted | May require documentation or opening walls | Don't assume simple legalization |
| Detached site conflicts with setbacks/easements | Local standards and site limits control | Treat detached feasibility as unresolved |
| Utilities lack access or capacity | State law lets cities deny on this basis | Get a utility read before 'quote-ready' |
| You're counting on nightly rental | Internal rentals must be 30+ days; detached may be stricter | Rework the plan around allowed use |
An ADU is not automatically a smart project just because Utah has become more ADU-friendly. In Taylorsville, your lot, parking, utilities, owner-occupancy situation, existing conditions, budget, and the timing of the October 2026 change can all shift the answer — sometimes to "not yet," or "not this type." The goal of a feasibility review is to find that out before you spend on plans, not after.
Should you start now or wait until October 1, 2026?
Homeowners pursuing a qualifying internal conversion don't need to wait for the new law. Homeowners set on a detached unit can start screening and planning now, but shouldn't buy final plans or bank on a permit date until Taylorsville's local standards and their site conditions are clear.
| Your goal | Start now? | What to do now | What not to assume |
|---|---|---|---|
| Basement / internal ADU | Yes | Screen the property, inspect the space, define scope, get estimates | That every basement automatically qualifies |
| Attached addition | Yes, cautiously | Confirm the project's local classification before final design | That all additions count as internal |
| Detached on an 11,000+ sq ft lot | Yes, for planning | Check lot, site, access, utilities, budget | That October means automatic approval |
| Detached below 11,000 sq ft | Screening only | Watch the local ordinance; test feasibility | That Taylorsville will pick a smaller threshold |
| Prefab unit | Yes, for total-cost analysis | Price the full installed scope, not the package | That factory pricing is turnkey |
| Rentable guesthouse | No under the current guesthouse path | Reclassify the project | That a guesthouse can be rented |
Your Taylorsville ADU feasibility checklist
This checklist can't approve an ADU, but it shows whether your project is ready for a useful builder conversation. If you can't answer several of these, gather the missing property facts before comparing prices — it's the difference between a real estimate and a guess.
Property
- The property is inside Taylorsville city limits
- The main structure is a detached single-family home
- You know your recorded lot size
- You know your existing structures and rough lot layout
Use
- You know who will live in the unit
- You know your own occupancy plan
- You know your intended rental length (and it's not nightly)
For an internal project
- Ceiling height measured
- Entrance location known
- Bedroom egress understood
- Plumbing/sewer location known
- Electrical panel info available
- HVAC arrangement known
- Existing permits / prior-work records available
For a detached project
- Lot is 11,000+ sq ft (or you've flagged it as below the threshold)
- Approximate placement area identified
- Setbacks and easements still to be verified
- Site access considered
- Utility route roughly understood
- Prefab delivery/crane access considered (if relevant)
Budget and builder readiness
- You've reviewed a realistic planning range
- Your desired scope and finish level are defined
- You'll compare bid inclusions and exclusions
- You'll recheck license and insurance before signing
- Your project doesn't require a guaranteed permit, tenant, or timeline to work
How we verified this guide
We separated adopted requirements, future state law, and planning estimates on purpose. Legal and permit points come from official sources; cost figures are labeled as planning estimates; and builder availability and license status are never treated as permanent.
Sources we checked
- Taylorsville City Code § 13.11.010 — Accessory Dwelling Units and Guesthouses (current internal-ADU and guesthouse rules).
- Utah Code § 10-21-303 (municipalities) and § 17-80-303 (counties) — internal-ADU protections statewide.
- Utah Code § 10-21-304 — detached-ADU requirement, effective October 1, 2026 (enacted 2026 General Session).
- Taylorsville Planning Commission minutes (March 24, 2026) — city-staff descriptions of the current internal-ADU category and preliminary lot-size analysis.
- Taylorsville Building Department — current plan-review guidance.
- Utah Code § 11-36a (Impact Fees Act) and the Utah Office of the Property Rights Ombudsman — Utah law prohibits an impact fee on construction of an internal ADU within an existing primary dwelling. That exemption is specific to impact fees; it does not waive building-permit fees, utility hookup fees, or other reasonable permit/application charges, and it does not extend to detached units, additions, or utility upgrades.
- Utah Division of Professional Licensing (DOPL) — contractor license verification (the official "Verify a License" tool) and an optional residential construction agreement.
What we did not verify or promise: exact permit or license fees, an exact end-to-end timeline, permit approval, builder availability, financing approval, rental income, tenant demand, property-value increase, Taylorsville's final detached-ADU setbacks/height/size rules, or the eligibility of any specific property.
Update policy. We review this page when Taylorsville adopts its local detached-ADU standards, and again before October 1, 2026, at the latest.
Last verified: July 2026.
Frequently asked questions about Taylorsville ADU builders
Utah ADU Builders is a Utah-focused ADU planning, feasibility, and builder-matching resource. We may receive compensation when homeowners request estimates or are connected with local professionals. That does not control how we explain Taylorsville's ADU rules, cost ranges, feasibility factors, or permitting risks. We are not affiliated with the City of Taylorsville; city rules can change, so confirm current requirements through a feasibility review before you build.
Related resources
- Can I build an ADU in Utah? Statewide guide · Utah ADU permit guide · Salt Lake County ADU guide
- Utah ADU cost guide · ADU financing in Utah · Is an ADU worth it in Utah?
- Basement ADU guide · Garage conversion guide · Detached ADU guide · Prefab ADU Utah
- ADU rental-duration rules in Utah · Utah ADU owner-occupancy rules · How long does it take to build an ADU?
- Nearby cities: West Jordan · Murray · Midvale · South Salt Lake · Millcreek · Salt Lake City