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Marina ADUs

Everything about building Accessory Dwelling Units in Marina, CA

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Marina ADU Guidelines Last Updated 04/05/20

PLANNING OFFICE The city planning office is not open to the public at this time, but is accepting ADU permit questions and applications.

The city government of Marina will approve ADUs under California's statewide mandated regulations.
The California Building Code (CBC) 2019 is adopted.
Relevant state bill updates for SB13, AB68, AB881, AB670 are shown in green below.


City Hint: The city has not yet responded to requests for ADU permit volumes for the past year, but they will be provided here once response has been received.

Number of ADUs allowed:

According to state law, all single-family homes are allowed at least one Accessory Dwelling Unit (ADU). Additionally, single-family lots which are owner-occupied may create one Accessory Dwelling Unit (ADU) and one Junior ADU. Also, multi-family lots may now add one ADU per every four existing residential units, so long as they were legally established.

As of January 1st, 2020

Types of ADUs allowed:

Detached ADU, Attached ADU, Junior ADU are approved. ADUs may be new construction or converted from existing space. JADUs must be converted from existing space.

Lot size:

Accessory Dwelling Unit (ADU) projects on single family or multi-family residential properties will not be subject to the minimum lot size of the underlying local zoning code or by special ordinance. ~ AB68

As of January 1st, 2020

ADU size:

Single-family and multi-family Parcels will be approved to add up to 850 sq. ft. for a one bed ADU or up to 1,000 sq. ft. for a two bed ADU, regardless of the underlying zoning standards of the property. A Junior Accessort Dwelling Unit (JADU) up to 500 sq. ft. is approved. The minimum size of any living unit (including ADUs and Junior Accessort Dwelling Unit (JADU)s) is 150 sq. ft. according to Califronia Residential Code. ~ AB-68

As of January 1st, 2020


The maximum required setback for a detached new construction Accessory Dwelling Unit (ADU) shall be no more than 4 ft from the rear and side property lines. Setbacks will not be required for Accessory Dwelling Unit (ADU)s and Junior Accessort Dwelling Unit (JADU)s converted from existing space that was legally eastablished. Attached Accessory Dwelling Unit (ADU)s and conversions from existing space to be expanded will be required to comply with the setbacks of the underlying zone. ~ AB68

As of January 1st, 2020


Parcels which convert an existing garage to an ADU or Junior Accessort Dwelling Unit (JADU) will not be subject to replacement parking requirements. ~ According To AB68

As of January 1st, 2020

Fire Safety:

Accessory dwelling units shall not be required to provide fire sprinklers unless they are also required for the primary dwelling. ~ State Standards

Shape, materials and style:

Specific design styles and restrictions are not specified under State Standards. Passageways shall not be required in conjunction with the construction of an accessory dwelling unit. ~ State Standards


The maximum height of an ADU is not specified in the state standards. If ADU maximum height is not established locally, the height limitations of the underlying zone shall apply. ~ State Standards

Design review:

The municipality shall provide a ministerial review process which is not based on a discretionary approval for an ADU. The process shall take no less than 120 days. Valid applications submitted for ADUs, if not approved or denied within 120 days from submission, shall be considered approved. ~ State Standards

Number of Bedrooms:

No maximum number of bedrooms is established other than that implied by the maximum size of an ADU allowed. ~ State Standards


Owner-occupancy will not be required for new ADUs (conversion and new construction) built between 2020 and 2025. ~ SB13 Update

As of January 1st, 2020

Utility connections:

Connection and utility fees shall be reasonable, and shall not be disproportionately higher than those to develop primary dwellings, so as not to deter the development of ADUs. If a private sewage disposal system is used, such as a septic system, review and approval by a local health officer may be required. ~ State Standards

Allowed Zones:

*** Beginning in 2020, according to state law, all residential zoning districts, including single-family and multi-family, are allowed to build Accessory Dwelling Units. ***

As of January 1st, 2020

Residential Building Code:

The California Building Code (CBC) 2019 is adopted.

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ADU Example Designs

ADU Model 440 sqft

W 22 ft L 20 ft

ADU Model 500 sqft

W 25 ft L 20 ft

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Featured Financing Program

ADU Financing

CA Statewide

Tailored to ADU construction.
Based on project size & appreciation.
Learn how to qualify.

Karyn Jones

Program Representative

Call Now (760) 496-5959

Read Marina Housing Market Update

Featured ArticleState of CA

What are Accessory Dwelling Units? California Department of Housing and Community Development 2017-05-15

Featured ArticleState of CA

ADU Guides

ADU Services

A recent customer review:

"I’ve had the Housable team prepare five sets of plans now for me. I’ve completed two of the ADU projects so far. Let me start out by saying I am a general contractor so there is a slight advantage to understanding the plans. That being said where I live in the city of Monterey and I’m sure elsewhere ADU’s are so new that the building officials were not quite clear on what exactly was required. The Housable team helped us the entire way. They basically gave me a complete set of plans and all I had to do was drop them off to the city. The city did come back with some items they needed to be revised, Housable corrected them at no additional charge. What I liked about working with Housable is I was able to customize the finishes to the products I’m used to working with. They are open to anything that’s going to make the job easier. As far as a fixture schedule goes, the first go around their drafting team did provide specs for everything that would go into the ADU. However I did change them up and customize them to what I wanted. Overall it’s been a great experience working with them, I’ve had other draftsman/architect draw up plans for me before I found out about their team and they were more than double the price. "

John in Seaside, CA

Customer since February, 2020

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Costs / ROI



* upon completion of ADU


* based on local average price per sqft


* estimated by location


* 30 years / 5% interest rate / 20% down payment


Size: 500 sqft


Appreciation Estimate = (Base Value: $) / (Home's Living Space: sqft) * (ADU's Living Space: sqft)

Rental Estimate = (Rent Per Sqft: $2.96) * (ADU's Living Space: sqft)

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Expert Feasibility & Zoning Research

Use our ADU Property & Design Reports as a starting point to plan your ADU project. Our experts will do the legwork with your city or county planning office and design custom ADU concepts for your property and your needs.

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