Lincoln issues ADU permits ministerially (no discretionary review) through the Building Division. Applications must be approved or denied within 60 days of a complete submission per Cal. Gov. Code §65852.2(b), or 30 days when using an AB 1332 pre-approved plan.
Per LMC Chapter 18.37 and Cal. Gov. Code §65852.2(b)(1), the City of Lincoln must process ADU permit applications ministerially within 60 calendar days of receiving a complete application. AB 1332 pre-approved plan applications are processed within 30 days per the Lincoln Planning Division. Required submittals include: site plan; building permit application; Title 24 (T-24) energy calculations; PV solar plans meeting minimum kWh requirements (Cal. Energy Code); and fire sprinkler plans/hydraulic calculations if required. Pre-approved plans require authorization from the original plan designer and cannot be modified — deviations trigger full standalone review. JADU applications are processed concurrently with the primary dwelling permit when applicable.
Building an ADU without a permit triggers stop-work orders, double permit fees per LMC Title 15 (California Building Code adoption), and administrative penalties under LMC §1.20. State law (Health & Safety Code §17980.12) provides a path for legalizing certain unpermitted pre-2020 ADUs without bringing them to current code, subject to safety findings.
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