Concord ADU Permit Steps for Homeowners

Housing and Building Standards California 3 Minutes Read · published February 21, 2026 Flag of California

Concord, California homeowners who want to add an accessory dwelling unit (ADU) must follow city and state permitting rules before construction. This guide explains the typical permit steps, inspections, timelines, and enforcement routes you will meet when applying for an ADU in Concord. It highlights who enforces the rules, where to find official forms, and practical action steps to get a compliant permit and avoid penalties.

Permit steps overview

Below are common steps to obtain an ADU permit in Concord. Local requirements vary by lot, zoning, and whether the ADU is attached, detached, or a conversion.

  • Pre-application research: review zoning, ADU size limits, setbacks, and owner-occupancy rules with the City of Concord Planning Department.
  • Prepare plans: hire a licensed architect or designer and prepare site, floor, and elevation plans that meet California building and energy codes.
  • Submit application: file a building permit application and required attachments with the City Building Division.
  • Plan review: city staff will review for zoning compliance, building code, and utility connections; respond to plan check comments promptly.
  • Inspections: schedule and pass required inspections (foundation, framing, electrical, plumbing, final) during construction.
  • Permit closeout: obtain final approvals, pay any remaining fees, and record any required covenants or notices.
Start early: zoning or utility constraints can add weeks to project timelines.

Permits, timelines, and typical fees

Concord issues building permits for ADUs through its Building Division; plan-check times and fees vary by project scope. Specific fee schedules, deposits, or application fees are published by the City and in the municipal code or fee resolution where available. For code text and penalty provisions see the municipal code cited below.[1]

Penalties & Enforcement

The City of Concord enforces permit and zoning compliance through the Building Division and Code Enforcement. Enforcement actions for unpermitted ADUs or code violations can include administrative fines, stop-work orders, and legal actions. Where exact penalty amounts or escalation schedules are not shown on the cited page, the text below notes that the amount is not specified on the cited page and cites the municipal code resource.[1]

  • Monetary fines: specific dollar amounts for unpermitted construction or zoning violations are not specified on the cited page.
  • Escalation: first, repeat, or continuing violations and per-day calculations are not specified on the cited page.
  • Non-monetary sanctions: stop-work orders, demolition or removal orders, and recordation of notices against title are possible remedies under city enforcement authority.
  • Enforcer: City of Concord Building Division and Code Enforcement handle inspections, complaints, and enforcement; appeals and review procedures are administered by the city (time limits not specified on the cited page).
If you discover an unpermitted ADU, contact the Building Division immediately to discuss retrofit and permitting options.

Applications & Forms

The usual submittals for an ADU project include a Building Permit Application, site and floor plans, structural calculations if required, utility connection forms, and any required recorded notices or covenants. The exact form names, numbers, and current fees are not specified on the municipal code page cited; check the City Building Division for the current application packet and fee schedule.[1]

How to prepare a compliant ADU application

  • Check zoning: confirm ADUs are allowed on your parcel and note size/setback limits.
  • Include energy compliance documentation per California Title 24.
  • Plan for utilities: verify sewer, water, and electrical capacity and obtain any necessary connection permits.
  • Schedule inspections early and respond promptly to plan-check corrections.
A complete first submission avoids repeated plan checks and reduces fees and delays.

FAQ

Do I need a permit to build an ADU in Concord?
Yes. Building and zoning permits are required before construction; contact the City Building Division for the official application packet.
How long does permit review take?
Review times vary by project complexity and workload; the municipal code does not specify a uniform review timeline.
What if my ADU was built without a permit?
Contact Code Enforcement or the Building Division to determine retroactive permitting, possible penalties, and steps to resolve violations.

How-To

  1. Confirm zoning and lot eligibility with the Concord Planning Division.
  2. Assemble plans and technical documentation required for a building permit.
  3. Submit the building permit application and pay applicable fees to the Building Division.
  4. Address plan-check comments and schedule inspections during construction.
  5. Obtain final approval and any required recorded notices to close the permit.

Key Takeaways

  • Start with zoning verification to avoid rejected applications.
  • Use licensed professionals for plans to meet building and energy codes.
  • Contact the City early if an ADU exists without permits to reduce escalation risk.

Help and Support / Resources

  1. [1] Concord Municipal Code - Code of Ordinances (Municode)

Categories

General Governance and Administration Public Safety Public Health and Welfare Land Use and Zoning Housing and Building Standards Transportation Environmental Protection Parks and Public Spaces Business and Consumer Protection Taxation and Finance Labor and Employment Education Civil Rights and Equity Elections and Campaign Finance Events and Special Uses Signs and Advertising Utilities and Infrastructure Technology and Data