Administrative overview · FIPS 06105
Trinity County permit authority
The first compliance decision is jurisdictional: identify the office with statutory authority over your parcel, then use its filing and inspection sequence to keep the project moving.
Jurisdictional status
County
This county profile is the primary starting point for unincorporated-area permitting.
Responsible agency
Trinity County Community Development Department - Building Division
For a project in or near Trinity County, this office is the identified point of contact for permit intake, statutory code enforcement, plan review coordination, and inspection release conditions. Confirm the parcel’s boundary and project type before relying on the county lane.
Direct contact
(530) 623-1354; inspection line (530) 623-4890; Planning/Zoning (530) 623-1351 ext. 2
Call before mobilizing if the project has a boundary, occupancy, fire, septic, or utility question.
Permit counter
Trinity County Building Division, 61 Airport Road, Weaverville, CA 96093
Operating hours
Building Division counter: Monday-Thursday, 8:00 a.m.-2:00 p.m.; Fridays by appointment. Building inspections are generally performed 8:00 a.m.-3:00 p.m. Planning business hours are Monday-Friday, 8:00 a.m.-5:00 p.m., excluding holidays, with counter hours Monday-Thursday, 8:00 a.m.-2:00 p.m.
Review expectation
Up to 6 weeks after a complete submittal. The County requires the building permit application, three complete sets of building plans, three site maps, plan-review/zoning fee payment, and other project-specific documents before review; incomplete submittals can be returned and incur additional fees upon resubmission and rereview.
Compliance workbench
Choose the next project decision.
Apply online
Open the verified digital gateway, application form, and review timeline.
Open guide →Fees & penalties
Understand fee schedules, enforcement exposure, and stop-work liabilities.
Open guide →Codes & exemptions
Read the code framework, minor-work exemptions, and inspection lane.
Open guide →Agency website
Visit the primary public source for current notices and contact changes.
Open guide →Source trail
Official sources for this profile
Use these direct agency or licensing links to confirm current instructions before you file, pay, or schedule work. External pages control if their information differs from this directory.
Project questions
Frequently asked questions for Trinity County
Who handles permitting for this jurisdiction?
Trinity County Community Development Department - Building Division is the identified county-level authority for this profile. Confirm that the property is in its service area before filing.
How should I begin an application?
No verified online portal was located in the reviewed public materials. Contact (530) 623-1354; inspection line (530) 623-4890; Planning/Zoning (530) 623-1351 ext. 2 and request the current application route before preparing a final submittal.
How long might review take?
Up to 6 weeks after a complete submittal. The County requires the building permit application, three complete sets of building plans, three site maps, plan-review/zoning fee payment, and other project-specific documents before review; incomplete submittals can be returned and incur additional fees upon resubmission and rereview.
How are inspections scheduled?
Call the inspection line at (530) 623-4890 and leave the permit number, requested inspection date, inspection type, name, job address, and phone number. Requests may be left 24 hours a day and should be made before 7:30 a.m. on the requested day; same-day placement requires a message before 8:00 a.m. Inspections generally run 8:00 a.m.-3:00 p.m. and are assigned by geographic day. The permit holder must give at least 24 hours' notice, keep approved plans and permit cards onsite, and have the work ready for the required foundation, underfloor, roof sheathing, four-way, insulation, lath/drywall, and final inspections.
Which codes and exemptions should I review?
2025 California Building Standards Code, Title 24, effective January 1, 2026, automatically adopted by reference under Trinity County Code Section 15.04.010.A, including applicable Building, Residential, Electrical, Mechanical, Plumbing, Energy, Green Building, Fire, Existing Building, and Wildland-Urban Interface provisions. County Title 15 and local Trinity County Fire Safe Standards (Ordinance 1162/TCC 8.30) also apply where relevant. Trinity County Ordinance 1373 (June 3, 2025) exempts one-story detached accessory structures up to 120 sq. ft. used only for general storage; fences up to 7 ft. subject to zoning and transportation rules; retaining walls up to 4 ft. measured from the footing bottom unless supporting a surcharge; grade-supported water tanks up to 5,000 gallons with a height-to-width/diameter ratio no greater than 20:1; qualifying painting, papering, tiling, carpeting, cabinets, countertops, and similar finish work; prefabricated pools under 24 inches deep; playground equipment; qualifying wall-supported awnings projecting no more than 54 inches; and decks up to 200 sq. ft. and 30 inches above grade. Agricultural buildings may be exempt only when used for qualifying agricultural storage/production purposes, in allowed zoning districts, after a letter of intent and zoning clearance; plumbing and electrical work are not exempt and still requires permits.