Chico ADU Permits & Energy Efficiency Rules

Housing and Building Standards California 3 Minutes Read ยท published March 01, 2026 Flag of California

In Chico, California, homeowners planning an accessory dwelling unit (ADU) must follow local permit rules and statewide energy standards enforced through building permits. This guide explains the typical permit pathway, what energy rules apply at plan check and inspection, who enforces compliance, and practical steps to apply, pay fees, and appeal decisions.

Permits and When They Apply

Most ADUs require a building permit and planning review before construction begins. Permit scope includes structural, plumbing, electrical, and energy compliance documentation submitted at plan check. Confirm permit types with the City Building Division when preparing plans [1].

Obtain written permit clearance before starting any construction.

Penalties & Enforcement

The City enforces building and zoning rules through the Building Division and Code Enforcement; penalties and enforcement procedures depend on the violation type and authority action. Specific fine amounts are not always published on the general permit pages and may be "not specified on the cited page" below where applicable. For energy-code enforcement, the California Energy Commission's Title 24 standards are applied during plan review and inspections [2].

  • Fines: specific dollar amounts for unpermitted work or code violations are not specified on the cited permit pages.
  • Escalation: first notices, civil penalties, and abatement orders may be used; exact ranges are not specified on the cited page.
  • Non-monetary sanctions: stop-work orders, mandatory plan revisions, demolition or removal orders, and court actions are authorized by enforcement code.
  • Enforcer and complaints: the City Building Division and Code Enforcement accept complaints and conduct inspections; contact details appear on the Building Division page [1].
  • Appeals: permit decisions and enforcement orders generally include an appeal or review route to the Planning Commission or an administrative appeals process; specific time limits are not specified on the cited permit pages.
Resolve code issues quickly to avoid escalated penalties and stop-work orders.

Applications & Forms

The Building Division posts permit application checklists and submittal requirements; specific form numbers or consolidated ADU application PDFs may be provided on the City site or at counter. If a form number or fixed fee is not shown on the linked page, it is "not specified on the cited page" and applicants should confirm current forms and fees with the Building Division when filing [1].

  • Typical submissions: permit application, site plan, floor plans, energy compliance forms, and structural calculations.
  • Fees: building and plan-check fees apply; exact fee amounts depend on valuation and are listed by application or fee schedule on official pages.
  • Submission: online portal or in-person submittal to the Building Division as specified on the City site [1].

How-To

  1. Prepare a complete plan set including energy compliance documentation consistent with Title 24 requirements.
  2. Submit permit application and plans to the City Building Division for plan check.
  3. Respond to plan-check corrections promptly and update energy calculations as requested by plan-check staff.
  4. Schedule inspections for foundations, rough inspections, and final inspection; pass energy and mechanical checks at each required stage.
  5. Pay any required permit and inspection fees as invoiced before final approval.
  6. If you receive an enforcement notice, follow instructions for correction or file an appeal within the time limit listed on the notice or contact the appeals officer.
Keep clear records of all submittals, approvals, and inspection reports for final occupancy approval.

FAQ

Do I need a permit to build an ADU in Chico?
Yes. Most ADUs require planning review and a building permit; confirm submittal requirements with the City Building Division [1].
What energy rules apply to ADUs?
ADUs must meet California's Title 24 energy standards at plan check and inspections; see the state energy standards page for specifics [2].
How do I report unpermitted ADU construction?
Report suspected unpermitted work to the City Code Enforcement or Building Division using the official contact channels listed on the City's Building Division page [1].

Key Takeaways

  • Start with the Building Division to confirm permit scope and energy compliance needs.
  • Include Title 24 energy documentation with your initial ADU submittal to reduce plan-check corrections.
  • Use official City contacts for complaints, questions, and appeals to avoid delays.

Help and Support / Resources

  1. [1] City of Chico Building Division - Permits & Inspections
  2. [2] California Energy Commission - Title 24

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