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Codes, exemptions & field inspections

Build to the adopted code. Verify every exception.

This guide translates the available agency record into a preconstruction checklist for structural scope, minor work, and inspection release. The adopted code and the issuing official control when a field condition is disputed.

Regulatory framework

The code baseline for Solano County.

Solano County's current requirements page lists the 2025 California Building Code, 2025 California Residential Code, 2025 California Mechanical Code, 2025 California Electrical Code, 2025 California Plumbing Code, 2025 California Fire Code, 2025 California Energy Code, 2025 California Green Building Standards Code, 2025 California Wildland-Urban Interface Code, and 2025 California Existing Building Code, with applicable County ordinances and fire-hazard-severity-zone requirements for unincorporated areas.

Inspection lane

Call the 24-hour inspection request line at (707) 784-4750 and leave the permit number, job-site address, inspection type, and callback number. Requests made before 3:00 p.m. are scheduled for the following business day; later requests are scheduled two business days later. Specific times cannot be requested. Keep approved plans and the permit card on site, and do not cover work before inspection.

Minor-work playbook

Understand what may be exempt—and what is not.

Under the County's CBC Section 105.2 guidance, exemptions include one-story detached accessory sheds/storage buildings/playhouses up to 120 sq. ft. with no utilities; fences up to 6 ft.; oil derricks; retaining walls up to 4 ft. measured from footing bottom unless supporting surcharge or certain liquids; grade-supported water tanks up to 5,000 gallons at no more than a 2:1 height-to-width/diameter ratio (piping and electrical still require permits); qualifying sidewalks and driveways no more than 30 inches above grade; painting, papering, tiling, carpeting, cabinets, countertops, and similar finish work; temporary stage sets; qualifying above-ground prefabricated pools under 24 inches deep and 5,000 gallons; agricultural/nursery shade-cloth structures without service systems; residential playground equipment; qualifying wall-supported window awnings projecting no more than 54 inches; and movable fixtures/cases/racks/counters/partitions no higher than 5 ft. 9 in. Commercial or industrial counters still require permits.

Field rule

A permit exemption generally addresses one narrow construction trigger. It does not automatically waive zoning, land-use, floodplain, shoreline, fire, energy, electrical, utility, septic, or right-of-way requirements. Obtain written confirmation when the project involves a new structure, structural alteration, change in occupancy, or concealed work.

Inspection pipeline

Keep the work visible at every release point.

  1. 1

    Request with lead time

    Call the 24-hour inspection request line at (707) 784-4750 and leave the permit number, job-site address, inspection type, and callback number. Requests made before 3:00 p.m. are scheduled for the following business day; later requests are scheduled two business days later. Specific times cannot be requested. Keep approved plans and the permit card on site, and do not cover work before inspection.

  2. 2

    Preserve access

    Do not cover framing, reinforcement, wiring, piping, damp-proofing, or life-safety work until the required inspection has been completed and documented.

  3. 3

    Close the record

    Retain the approved plans, inspection approvals, correction responses, and final certificate or occupancy release with the property file.

Contractor verification

Verify the builder before the contract is signed.

Use the state licensing system to verify active registration, trade credentials, bond status, and liability coverage where available. Match the legal business name to the proposal and permit application.

Verify contractor ↗

Planning reference

Keep the parcel rules beside the building plans.

A building permit is only one part of statutory compliance. Check the local zoning, ordinance, map, or land-use reference before finalizing setbacks, height, lot coverage, access, drainage, or accessory structure placement.

Open planning reference ↗

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.

Agency websiteOpen official source ↗Permit portalOpen official source ↗Application instructionsOpen official source ↗Fee scheduleOpen official source ↗Planning or zoning referenceOpen official source ↗Contractor license lookupOpen official source ↗

Project questions

Frequently asked questions for Solano County

Who handles permitting for this jurisdiction?

Solano County Department of Resource Management - Building & Safety Services 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?

Begin with the online permit gateway listed in the application guide. If the portal does not recognize the address or project type, contact (707) 784-6765; 24-hour inspection request line (707) 784-4750.

How long might review take?

N/A; the County explains that plan review begins after electronic submittal and payment of plan-check fees, but does not publish a standard review duration. Timing varies by project type, completeness, corrections, and agency requirements.

How are inspections scheduled?

Call the 24-hour inspection request line at (707) 784-4750 and leave the permit number, job-site address, inspection type, and callback number. Requests made before 3:00 p.m. are scheduled for the following business day; later requests are scheduled two business days later. Specific times cannot be requested. Keep approved plans and the permit card on site, and do not cover work before inspection.

Which codes and exemptions should I review?

Solano County's current requirements page lists the 2025 California Building Code, 2025 California Residential Code, 2025 California Mechanical Code, 2025 California Electrical Code, 2025 California Plumbing Code, 2025 California Fire Code, 2025 California Energy Code, 2025 California Green Building Standards Code, 2025 California Wildland-Urban Interface Code, and 2025 California Existing Building Code, with applicable County ordinances and fire-hazard-severity-zone requirements for unincorporated areas. Under the County's CBC Section 105.2 guidance, exemptions include one-story detached accessory sheds/storage buildings/playhouses up to 120 sq. ft. with no utilities; fences up to 6 ft.; oil derricks; retaining walls up to 4 ft. measured from footing bottom unless supporting surcharge or certain liquids; grade-supported water tanks up to 5,000 gallons at no more than a 2:1 height-to-width/diameter ratio (piping and electrical still require permits); qualifying sidewalks and driveways no more than 30 inches above grade; painting, papering, tiling, carpeting, cabinets, countertops, and similar finish work; temporary stage sets; qualifying above-ground prefabricated pools under 24 inches deep and 5,000 gallons; agricultural/nursery shade-cloth structures without service systems; residential playground equipment; qualifying wall-supported window awnings projecting no more than 54 inches; and movable fixtures/cases/racks/counters/partitions no higher than 5 ft. 9 in. Commercial or industrial counters still require permits.

Field sequencing matters

The inspector needs to see the work at the right moment.

Code compliance is not only a plan-review exercise. Footings, reinforcement, framing, fireblocking, wiring, piping, insulation, weather protection, and life-safety systems each have points where the work must remain accessible. Build the inspection calendar into the trade schedule instead of treating it as a final administrative step.

When a project qualifies for a narrow minor-work exemption, keep a written explanation of why it qualifies and confirm that related zoning, utility, fire, energy, or environmental rules do not create a separate approval requirement.

Closeout file

Keep the approved plan set, inspection approvals, correction responses, contractor license verification, final certificate, and any occupancy release together. A clean record protects the owner, builder, lender, insurer, and future buyer.