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Residential Building Permit in Unincorporated Cache County, Utah

Required for new residential construction, additions, and structural alterations in unincorporated Cache County. The Cache County Building Division issues permits for unincorporated county areas and many incorporated municipalities (Amalga, Avon, Benson, Cornish, Cove, Hyrum, Millville, Paradise, Petersboro, Providence, Richmond, River Heights, Smithfield, Trenton, Wellsville). Logan City and several others issue their own permits.

Verified 2026-07-17 · Source

When you need this permit

  • New single-family dwelling construction
  • Additions to existing residential structures
  • Any structural modification or alteration
  • Projects with valuation over $500
  • New SFD plans must be engineered plans (per Cache County Building Division policy)

Required documents

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Fee schedule

Residential Valuation FormulaCache County Building Division Fee Schedule, Ord. 2024-18 (adopted 11/6/2024). Example from fee schedule: 1,200 main + 1,400 upper + 1,200 basement + 650 garage = $479,750 valuation → $3,000 base fee.
Main Floor sq ft × $150 + Upper Floors sq ft × $120 + Basement sq ft × $80 + Garage sq ft × $55 = Project Valuation
New SFD — valuation $0–$300,000Cache County Building Division Fee Schedule, Ord. 2024-18 (adopted 11/6/2024), table 'Single Family Dwelling - New Construction - Unincorporated'; re-verified live 2026-07-17
$2,500
New SFD — valuation $300,000–$500,000Cache County Building Division Fee Schedule, Ord. 2024-18; re-verified live 2026-07-17
$3,000
New SFD — valuation $500,000–$700,000Cache County Building Division Fee Schedule, Ord. 2024-18; re-verified live 2026-07-17. CORRECTED 2026-07-17: this file previously listed the bracket as $500,000–$750,000; the live PDF's 'Single Family Dwelling - New Construction - Unincorporated' table breaks at $700,000, not $750,000.
$3,800
New SFD — valuation $700,000–$850,000Cache County Building Division Fee Schedule, Ord. 2024-18; re-verified live 2026-07-17. CORRECTED 2026-07-17: this bracket was missing from this file — the old 5-tier structure ($2,500/$3,000/$3,800/$4,800/Consult at 300k/500k/750k/1M breakpoints) had been copied from the Detached ADU fee table rather than the actual SFD table.
$5,200
New SFD — valuation $850,000–$1,000,000Cache County Building Division Fee Schedule, Ord. 2024-18; re-verified live 2026-07-17. CORRECTED 2026-07-17: this bracket was missing from this file (previously covered by the erroneous $750,000–$1,000,000 / $4,800 ADU-table row).
$7,800
New SFD — valuation $1,000,000–$2,000,000Cache County Building Division Fee Schedule, Ord. 2024-18; re-verified live 2026-07-17. CORRECTED 2026-07-17: this file previously jumped straight to 'over $1,000,000 — Consult' with no $1M–$2M tier; the PDF's unincorporated SFD table has a distinct $8,600 tier here, with 'Consult' reserved for over $2,000,000.
$8,600
New SFD — valuation over $2,000,000Cache County Building Division Fee Schedule, Ord. 2024-18; re-verified live 2026-07-17. CORRECTED 2026-07-17: threshold moved from over $1,000,000 to over $2,000,000 to match the PDF's unincorporated SFD table.
Consult building department
Plan Review FeeCache County Building Division Fee Schedule, Ord. 2024-18
15% of base permit fee
State SurchargeCache County Building Division Fee Schedule, Ord. 2024-18
1% of permit fee
Re-Inspection FeeCache County Building Division Fee Schedule, Ord. 2024-18; assessed if not ready when inspector arrives
$75
Credit/Debit Card Processing FeeCache County Building Permit Applications page, cachecounty.gov/building/building-permit-applications.html
2.5% service fee (AMEX not accepted); e-check $0.49 flat

Review timeline

Plan reviewUnincorporated Cache County’s published plan-review target
3–10 business days

How long did your Residential Building Permit permit actually take in Unincorporated Cache County?

Anonymous — one question, no email. Answers are combined and only shown once at least 5 people have reported.

Inspection process

  1. 1

    Foundation / Footing

    Before concrete pour — verify excavation, forms, rebar, and anchor bolts. Concrete inspections: notify staff when concrete truck is scheduled so inspector can arrive before truck.

  2. 2

    Framing / 4-Way

    After framing, sheathing, and rough-in MEP — before insulation or wall cover. Windows and flashing must be installed for the 4-way inspection.

  3. 3

    Insulation

    After insulation installed, before drywall

  4. 4

    Final

    All work complete, ready for occupancy. Do a final walk-through before scheduling — inspectors may assess $75 re-inspection fee if not ready.

See the full Unincorporated Cache County inspection guide — scheduling & re-inspection fees →

Tips

  • All applications must be submitted digitally by email to cachecountyplanreview@gmail.com with ALL materials in one email — incomplete applications are deleted from the queue.
  • Inspections must be requested at least 24 hours in advance, with a 3:30 PM cutoff the prior business day. Calling 2–3 days in advance is recommended.
  • Cache County requires a Zoning Clearance from the Planning & Zoning office before a building permit can be processed — contact (435) 755-1640.
  • For permanent power clearance, the Request or Work Order Number issued by Rocky Mountain Power must be provided before staff can email the inspection report to Rocky Mountain Power.
  • Permits expire if work does not commence within 180 days of issuance, or if work is suspended for 180 days.

Frequently asked questions

Unincorporated Cache County requires a residential building permit for: New single-family dwelling construction; Additions to existing residential structures; Any structural modification or alteration; Projects with valuation over $500; New SFD plans must be engineered plans (per Cache County Building Division policy). If your project isn't listed, confirm with Cache County Building Division at (435) 755-1650 before starting work.

Cache County uses a valuation-based fee with a specific formula: Main Floor sq ft × $150 + Upper Floors × $120 + Basement × $80 + Garage × $55. The resulting valuation determines the base fee: $2,500 (up to $300,000), $3,000 ($300k–$500k), $3,800 ($500k–$700k), $5,200 ($700k–$850k), $7,800 ($850k–$1M), $8,600 ($1M–$2M), consult above $2M. Plan review is 15% of base fee; state surcharge is 1% of permit fee. Adopted as Ord. 2024-18 on 11/6/2024. (Corrected 2026-07-17 — tiers above $500k previously listed incorrect breakpoints/amounts.)

Unincorporated Cache County's published plan-review target for a residential building permit is 3–10 business days.

You'll need: Building Permit Application; Approved Zoning Clearance and Site Plan; Complete Set of Building Plans (PDF); REScheck (Energy Compliance). Depending on your project, Unincorporated Cache County may also ask for: Manual J&D Form; Owner/Builder Certification. See the required-documents checklist on this page for details on each.

Unincorporated Cache County requires 4 inspection(s) for a residential building permit, in order: Foundation / Footing, Framing / 4-Way, Insulation, Final. Schedule each through Cache County Building Division ((435) 755-1650).

Download and complete the Building Permit Application from cachecounty.gov/building/building-permit-applications.html. Gather all required documents (zoning clearance, building plans, REScheck, Manual J&D if needed, owner/builder cert if applicable) and email all materials at once to cachecountyplanreview@gmail.com. Incomplete applications will not be accepted.

Unincorporated Cache County, Utah has adopted: 2024 International Building Code (IBC), including Appendices C and J — Utah Code § 15A-2-103(1)(a); current edition as of July 1, 2026 (2021 edition governed through June 30, 2026); 2021 International Residential Code (IRC), plus Appendix AQ of the 2021 IRC — Utah Code § 15A-2-103(1)(b)/(c); unchanged by the July 1, 2026 revision — still the current edition; 2024 International Plumbing Code (IPC) — Utah Code § 15A-2-103(1)(d); current edition as of July 1, 2026 (2021 edition governed through June 30, 2026); 2024 International Mechanical Code (IMC) — Utah Code § 15A-2-103(1)(e); current edition as of July 1, 2026 (2021 edition governed through June 30, 2026); 2024 International Fuel Gas Code (IFGC) — Utah Code § 15A-2-103(1)(f); current edition as of July 1, 2026 (2021 edition governed through June 30, 2026); 2024 International Energy Conservation Code (IECC) — Utah Code § 15A-2-103(1)(h); current edition as of July 1, 2026 (2021 edition governed through June 30, 2026); statute has no residential/commercial split — one edition applies to both. NOTE (county page live-checked 2026-07-16): the Cache County Building Code Information page lists 2024 IECC in its main statewide-codes list but separately carries a 'Residential Code: 2021 IRC and the 2021 IECC' line for dwellings up to a duplex — that residential IECC carve-out lags the statute, which adopts a single 2024 IECC edition with no residential/commercial split; the statewide 2024 IECC governs.; 2024 International Existing Building Code (IEBC) — Utah Code § 15A-2-103(1)(i); current edition as of July 1, 2026 (2021 edition governed through June 30, 2026); 2024 International Swimming Pool and Spa Code (ISPSC), residential provisions — Utah Code § 15A-2-103(1)(n); current edition as of July 1, 2026 (2021 edition governed through June 30, 2026); 2023 National Electrical Code (NEC) — Utah Code § 15A-2-103(1)(g); statewide in force, unchanged by the July 1, 2026 revision. NOTE: The Cache County Building Code Information page (last seen 2026-06-30) still lists '2020 NEC' — that page is not updated; the statewide 2023 NEC is the legally in-force edition.; NOTE (verified 2026-07-16 against the live Utah Code § 15A-2-103 text, version headed 'Effective 7/1/2026 / Superseded 1/1/2027'): the 2024 editions of IBC, IPC, IMC, IFGC, IECC, IEBC, and ISPSC listed above took effect July 1, 2026, replacing the 2021 editions; IRC (2021) and NEC (2023) did not change. The 1/1/2027 version of the statute carries identical editions, so no further flip is expected then. This file previously forecast this change but still led with the 2021 editions as current — corrected on this date..

Sources & verification

Verified against official sources. Last reviewed 2026-07-17.

Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Unincorporated Cache County building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

Other permits in Unincorporated Cache County

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