Adu Planning Services

ADU construction is the step-by-step process of planning, permitting, and building an Accessory Dwelling Unit on an existing residential property. While every project is unique, most ADU builds follow a predictable construction sequence from feasibility through final inspection.

The available plans currently reflect the 2022 California Building Code Standards. Please note that we are in the process of updating the plans to reflect 2025 California Building Code and will have the updated plans available soon.

A three-year trial merger is underway between ADU Marin — a collaboration involving the county and 10 Marin municipalities — and the Napa Sonoma ADU Center, a project sponsored by Napa Valley Community Foundation, Community Foundation Sonoma County and other entities.

Marin residents thinking about installing an accessory dwelling unit will soon gain access to increased planning assistance.

Korey Turk is a designer with over 15 years of construction experience, creating ADUs that enhance property value and fit naturally with the home, bringing clients' visions to life.

Moving forward, it's essential to keep these visual contexts in mind when discussing Adu Planning Services.

The Napa Sonoma ADU Center was created after the October 2017 Tubbs fire, which destroyed more than 5,643 structures, including 5% of Santa Rosa’s housing stock.

Accessory dwelling units, commonly known as ADUs or granny pods, offer a versatile solution for expanding living arrangements. These structures enable families to accommodate multigenerational households with independence, elevate property worth, and generate potential rental revenue. A thorough grasp of construction expenses equips homeowners to budget effectively and sidestep unforeseen expenditures. This resource examines projected costs, influential design elements, and essential professional input for developing a granny pod or ADU.

This particular example perfectly highlights why Adu Planning Services is so captivating.

Applicants that create use of a Pre-Approved ADU plan set must submit a complete package through the County’s online portal MyOCService for review and approval. Click here for application guide.

The Pre-Approved ADU Plans Program encourages the construction of new, detached ADUs by offering property owners a selection of Pre-Approved ADU building plans. While some site-specific design work is required, these pre-approved plans aim to aid property owners reduce pre-construction costs and improve permit approval efficiency.

ADU construction is the process of planning, permitting, and building an Accessory Dwelling Unit on an existing residential property. Building an ADU typically includes feasibility analysis, choosing an ADU type, budgeting, design, permits, site work, foundation , framing, utilities, interior finishes, and final inspection. From start to finish, most ADU projects take 8–12 months, depending on location, complexity, and permitting timelines.