Building permits in Salt Lake County, Utah
Find the right authority before you build. Salt Lake County permitting follows Utah law — here is exactly who issues the permit and where to start.
County + cities (mixed)
Cities within Salt Lake County issue building permits; Salt Lake County issues permits for unincorporated areas
Utah building permits are issued by cities; Salt Lake County issues permits only for unincorporated areas and contracts with some towns. Most residents live inside an incorporated city (Salt Lake City, West Valley, Sandy, etc.) that runs its own building department.
Open the official permit portal →
Confirm whether your address is inside a city before contacting the county. Cities adopt the Utah State Construction Code (Utah Code Title 15A).
Permit cheat-sheet (Utah rules)
| Project | Permit? | Authority | Typical fee | Timeline | Go / No-Go | Key notes |
|---|---|---|---|---|---|---|
| 🏠 Accessory Dwelling Unit (ADU) | Conditional | city | Valuation-based; set by the city under the statewide code. | Plan review through the city (SLC first review ~14 business days). | Generally allowed | Utah follows the statewide Utah Construction Code (IRC-based). ADU allowances are set by local zoning; construction must meet all IRC standards. Local jurisdictions cannot enforce rules more restrictive than the state code (Utah Code Title 15A). Exempt: Local zoning sets size, setback, and parking limits; state law supports ADU by right in many cases. |
| 🪵 Deck / Porch | Conditional | city | Valuation-based; set by the city. | Over-the-counter or 1–3 weeks depending on complexity. | Generally allowed | Utah amendments emphasize proper ledger-board attachment, flashing, and lateral-load connections for decks. Exempt: Decks ≤30 in above adjacent grade are exempt under IRC R105.2. |
| 🧱 Fence / Wall | Conditional | city | Set by the city; often low or over-the-counter for standard fences. | Often same-day/over-the-counter for non-corner lots. | Generally allowed | Pool-enclosure fences must meet barrier requirements regardless of height. Exempt: IRC R105.2 exempts fences ≤6 ft; local fences commonly exempt under this threshold. |
| 🛖 Shed / Outbuilding | Conditional | city | Valuation-based; set by the city. | Small sheds often over-the-counter. | Generally allowed | Anchoring and snow/wind load requirements apply; verify setback compliance with the city. Exempt: IRC R105.2 exempts detached accessory structures ≤120 sq ft. |
| 🪜 Basement Finish | Permit required | city | Valuation-based; includes trade permits. | Standard plan review 2–4 weeks. | Generally allowed | Utah’s energy code (amended IECC) applies to basement finishes; egress and smoke/CO alarms required. Exempt: Cosmetic finishing (paint, flooring) is exempt. |
| 🚗 Garage / Carport | Permit required | city | Valuation-based; includes trade permits. | New-structure plan review; varies by city. | Generally allowed | Attached and detached garages require a full building permit and plan review under the Utah Construction Code. Exempt: New detached structures over the IRC threshold require a permit. |
| ☀️ Rooftop Solar PV | Permit required | city | Building + electrical permits; fee set by city. | Issued with the building/electrical plan review. | Generally allowed | Utah exempts residential solar equipment from property tax (Utah Code § 59-2-106); provide racking designed for local wind/snow loads. Exempt: No size exemption; all rooftop PV requires permits. |
| 🌡️ HVAC Replacement | Conditional | city | Mechanical permit; fee set by city. | Trade permits often issued same-day. | Generally allowed | Equipment must meet Utah’s amended energy-code efficiency rules; heat-pump electrification is incentivized. Exempt: In-kind replacement in the same location may be exempt. |
| 🍳 Kitchen Remodel | Conditional | city | Valuation-based when structural/plumbing/electrical work is included. | Standard review for permitted scopes. | Generally allowed | Utah’s amended energy code applies to alterations that trigger it (insulation, window U-factor, HVAC). Exempt: Cabinet/countertop swap in the same layout is exempt. |
| 🛁 Bathroom Remodel | Conditional | city | Valuation-based when plumbing is relocated. | Standard review for permitted scopes. | Generally allowed | Ventilation to the exterior and GFCI protection are required; Utah energy code may apply to alterations. Exempt: Fixture-for-fixture swap in place is often exempt. |
| 🏗️ Room Addition | Permit required | city | Valuation-based; includes trade permits. | SLC first review ~14 business days; multiple inspections. | Generally allowed | Lot-coverage and Utah amended energy-code compliance are reviewed. Exempt: No exemption — any new conditioned footprint requires a permit. |
| 🪟 Window / Door Replacement | Conditional | city | Usually no fee for in-kind swap; permit needed if opening is enlarged. | In-kind swaps typically need no review. | Generally allowed | Replacement products should meet Utah’s amended energy-code U-factor when the code is triggered. Exempt: Same-size, in-kind replacement is generally exempt. |
| 🏘️ Roof Replacement | Conditional | city | Often over-the-counter or exempt for same-footprint re-roof. | Re-roof can be same-day/next-business-day. | Generally allowed | Snow-load and ice-shield requirements apply; verify locally. Exempt: Same-material, same-slope re-roof often exempt/over-the-counter. |
| 🅿️ Driveway / Parking Pad | Conditional | city | Building permit often not required; curb-cut/right-of-way work is separate. | Right-of-way permits reviewed by the city/utility. | Generally allowed | A separate right-of-way permit is usually needed to cut the curb or connect to the street. Exempt: Replacing a driveway in the same footprint (no new curb cut) is generally exempt. |
| 🏊 Swimming Pool / Spa | Permit required | city | Valuation-based; includes barrier/fencing and electrical bonding review. | Plan review; barrier inspection required before filling. | Generally allowed | Utah follows the IRC swimming-pool barrier requirements (ISPSC where adopted); verify with the building department. Exempt: No exemption — all permanent pools/spas require a permit. |
| 🧱 Retaining Wall | Conditional | city | Valuation-based when over the height threshold. | Over-threshold walls need plan review. | Generally allowed | Walls in hillside or drainage-path areas have stricter rules; verify with the building department. Exempt: Walls ≤4 ft above grade and not supporting a surcharge are exempt under IRC R105.2. |
| 💥 Demolition / Teardown | Permit required | city | Demolition permit fee set by the city; verify locally. | — | Generally allowed | A full teardown or major structural demolition requires a demolition (building) permit from the city under the Utah Construction Code. Structures built before 1978 may require an asbestos/lead-paint survey and abatement, and utility disconnects are typically required before teardown. Interior non-structural strip-out may be exempt. |
| 🚰 Septic System | Permit required | county | Onsite wastewater permit fee set by the local county health department; verify locally. | — | Generally allowed | New or replacement onsite wastewater (septic) systems require a construction permit from the local county health department under Utah Admin. Rule R317-4 (Utah DEQ Division of Water Quality). The Utah DEQ permits larger systems (daily flow over 5,000 gallons); counties issue the rest. A soil exploration and engineered design by a DWQ-certified professional are required. |
| 🔌 EV Charger | Conditional | city | Electrical permit fee set by the city; verify locally. | — | Generally allowed | A home EV charging station normally requires an electrical permit for a dedicated 240V circuit and wall unit, issued by the city under the Utah Construction Code / NEC. Plug-in (cord-and-plug) Level 1 charging from an existing outlet may be exempt where code allows; a new dedicated circuit or hardwired unit requires a permit. |
| ⚡ Standby Generator | Permit required | city | Electrical (and often mechanical/gas) permit fee set by the city; verify locally. | — | Generally allowed | A permanently installed standby generator with a transfer switch and fuel (natural gas/propane) line requires electrical and often mechanical/gas permits, plus inspection (NEC Art. 445/702 context). Setback, noise, and carbon-monoxide rules may apply, and HOAs may restrict installation. Verify with the city building department. |
Frequently asked questions
Who issues building permits in Salt Lake County, Utah?
Cities within Salt Lake County issue building permits; Salt Lake County issues permits for unincorporated areas is the permitting authority for Salt Lake County. Permitting is split — cities issue for incorporated areas, the county for unincorporated areas. Start at the official portal linked above.
Do I go to the county or my city for a building permit in Salt Lake County?
Permitting is split — cities issue for incorporated areas, the county for unincorporated areas.
What home projects need a permit in Salt Lake County?
The same project types shown in the cheat-sheet above (ADU, deck, fence, shed, solar, and more) — rules follow Utah state law. Whether the county or your city issues it depends on your property's incorporation status.
How do I apply for a permit in Salt Lake County?
Use the official permit portal linked above. Most offices accept online submissions; have your plans, site information, and contractor details ready before applying.
Sources: Salt Lake County — Building Safety · Utah Code Title 15A, Chapter 3 — State Construction Code · Salt Lake City — Building Permit Applications · Utah Division of Occupational and Professional Licensing (Uniform Building Code Commission) · Utah Code Title 15A, Chapter 3 — State Construction Code