Town of Mammoth Lakes Releases Free ADU Plans

In a push to provide additional long-term housing solutions, the Town of Mammoth Lakes has released five pre-engineered and approved ADU (Accessory Dwelling Unit) plans.  Owners of single family homes in Mammoth Lakes can use the plans, for free, and hopefully glide through the planning process quickly.  The town is aggressively trying to find alternative routes to providing long-term housing and are hoping this will help homeowners lean towards building ADUs on their lots while saving them time and money in the planning stage.

Accessory Dwelling Unit (also referred to as “dependent,” “Secondary Housing,” or “granny unit”) means residential occupancy of a living unit located on the same parcel as the primary residential unit. It provides complete, independent living facilities for one or more persons including permanent provisions for living, sleeping, eating, cooking, and sanitation on the same parcel as the primary unit is situated. An Accessory Dwelling Unit (ADU) shall meet the minimum regulations for an efficiency dwelling unit in the California Building Code.  Interested parties can review the five ADU plan sets on the Town’s Building Division website: or can contact the Building Division at (760) 965-3635.