Statewide Update: New California ADU Bills AB68, SB13, AB881, AB670 have passed. These laws create more options for building an ADU in 2020. Use ADU Services to learn how they affect your property!

Schedule ADU Consultation (650) 730-2387 ext: 796

Redwood City ADUs

Everything about building Accessory Dwelling Units in Redwood City, CA

Research local zoning codes for ADU design
Calculate returns and costs to get financing
Estimate your project costs and timeline

Check your property to get zoning info & price quotes for ADU feasibility & design services:

I'm interested in


PLANNING OFFICE The city planning office remains open at this time and is accepting inquires and permit applications.
codes

The city government of Redwood City 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.

Last Updated 03/27/20



hintsights

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.


Zoning

Number of ADUs allowed:

Under state law, each single-family home may now build at least one Accessory Dwelling Unit (ADU). Owner occupied single-family lots may build one Accessory Dwelling Unit (ADU) and one JADU. Multi-family lots, per every four existing residential units, may build one Accessory Dwelling Unit (ADU), so long as the existing units were legally established.

As of January 1st, 2020

Types of ADUs allowed:

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

Lot size:

Residential parcels will not be subject to any minimum lot size for ADUs by ordinance or of the underlying zoning district. ~ Updated: State Law AB-68

As of January 1st, 2020

ADU size:

Single-family and multi-family Properties will be allowed to add up to 850 square ft. for a one bed ADU or up to 1,000 square ft. for a two bed ADU, regardless of the underlying zoning standards of the property. A Junior ADU up to 500 square ft. is allowed. The minimum size of any living unit (including ADUs and Junior ADUs) is 150 square ft. according to Califronia Residential Code. ~ Updated: State Law AB-68

As of January 1st, 2020

Setbacks:

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 Accessory Dwelling Units 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. ~ AB-68

As of January 1st, 2020

Parking:

Parcels which convert an existing garage to an Accessory Dwelling Unit (ADU) or JADU will not be subject to replacement parking requirements. ~ AB-68

As of January 1st, 2020

Fire Safety:

Fire sprinklers shall be installed for the ADU.

Shape, materials and style:

An accessory dwelling unit shall be architecturally compatible with the architectural style and exterior paint and materials of the single family dwelling on the same lot.

Height:

Maximum building height is 28 feet and structures shall not exceed 2.5 stories. The building height of a detached accessory dwelling unit shall not exceed the building height of a single-family dwelling on the same lot.

Design review:

Ministerial review process.

Number of Bedrooms:

Up to one (1) bedroom shall be permitted.

Ownership:

Owner-occupancy will not be required for new Accessory Dwelling Unit (ADU)s (conversion and new construction) built between 2020 and 2025. ~ SB13 Update

As of January 1st, 2020

Utility connections:

shall be exempt from the requirement of upgrading a water main.

Permit Fees

SB13 Update: As of January 1st, 2020, local impact fees for ADUs will be reduced substantially statewide.

Definition:

An accessory dwelling unit, commonly known as a second unit or in-law unit, is an attached or detached dwelling unit that is located on the same lot as a single family dwelling and provides complete living, sleeping, eating, cooking, and sanitation facilities
separate and independent of the main dwelling.

Exceptions:

For lots that are greater than or equal to 10,000 square feet in the Residential Hillside (RH) or Residential Single-Family (R-1) Zoning Districts, the maximum allowable floor area for an ADU shall be 800 square feet and no more than two (2) bedrooms.

The homeowner may live offsite and rent out both the main house and the ADU due to:
a. A medical condition that requires residency elsewhere; or
b. The homeowner accepts a job transfer outside of the San Francisco Bay Area.

A detached ADU may be built within a required rear yard setback area provided that the ADU meets the following requirements:
a. Minimum Rear Yard Setback: 10 feet
b. Maximum Building Height: 14 feet
c. Maximum Wall Height: 9 feet
d. No more than 50% of the required rear yard setback area shall be covered by structures.

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. ***

An Accessory Dwelling Unit (ADU) may be built on the same property as an existing or proposed single-family residence in the RH, R-1, R-2, R-3, R-4, and R-5 zoning districts.

As of January 1st, 2020

Open Space:

The front yard shall be subject to the minimum pervious area and stormwater requirements of the underlying zoning district.

Lot Coverage:

Total lot coverage is limited to 40 percent of the lot area. Not more than 40 50 percent of the required rear yard shall be covered by any combination of accessory buildings or an accessory dwelling unit subject.

Residential Building Code:

The California Building Code (CBC) 2019 is adopted.

Redwood City City Planning Offices
Permitting

Redwood City Planning Division

Contact Planner Diana O'Dell. Counter Hours: 8AM-5PM (M/W/F), and 12:30PM-5PM (T/Th) (walk-ins welcome)

1017 Middlefield Road Redwood City, CA 94063

Featured LenderFinancing

Nikki James

Opes Advisors

Lic. #293138 View Profile

Contact Nikki James about ADUs in Redwood City. Send a text message:

Redwood City ADU Marketplace

How can I get my ADU built?

Use our ADU Services and Marketplace to get expert assistance, permit-ready ADU designs and on-site contractor estimates on one platform.

Fast and low cost ADU design services

Search local contractors to get estimates

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 Redwood City Housing Market Update

Featured ArticleRedwood City, CA
Featured ArticleRedwood City, CA
Featured ArticleState of CA

ADU Guides

ADU Services

A recent customer review:

"Quick response time and very knowledgeable about the ADU laws in California. Would definitely recommend your service to a friend or anyone that's interested in building an ADU. "

Kam in Hayward, CA

Customer since July, 2019


Learn about ADU Services


Estimate ADU Potential
Financing
Costs / ROI

APPRECIATION ESTIMATE

* upon completion of ADU

CONSTRUCTION COST ESTIMATE

* based on local average price per sqft

RENTAL ESTIMATE

* estimated by location

MORTGAGE ESTIMATE

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

BASED ON LOCAL AVERAGE PROPERTY DATA & VALUE

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

Rental Estimate = (Rent Per Sqft: $5.24) * (ADU's Living Space: sqft)




How can I get my ADU built?

Our ADU Services and ADU Marketplace provide the fastest and lowest cost way to get started with your ADU project.

How does it work? Get started on your project with expert assistance and without commitment using our customized ADU Property and Design Reports as your first step. Then, get on-site visits from local contractors who can provide you with guidance and estimates for your ADU project.

Our Key Advantages

Compare all the costs and services in one place to find the best fit for your needs and budget

Order ADU zoning research, permit-ready designs and contractor estimates on one platform

Get started on your timeline and your terms, without commitment

The fastest and lowest cost way to get started with your ADU project





Our ADU Process

USE ADU SERVICES
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.

OPEN ADU MARKETPLACE
Find contractors to build your ADU

Use our local contractor database to get on-site visits and cost estimates to compare services for your ADU project.

Getting your designs ready for city permitting and construction can speed up your ADU project and reduce unforseen costs later on in the process.




Check your property to get zoning qualification & price quotes for ADU Services:

Access cost estimates, zoning analysis, design concepts and order ADU Services to get help with feasibility, design and permitting for your ADU project. Check your property to get started!

I'm interested in