Waterloo
ADUs
Everything about building Accessory Dwelling Units in Waterloo, CA
Check your property's zoning, browse designs & get contractor estimates for your ADU project:
Waterloo ADU Guidelines Last Updated 01/26/21
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 Accessory Dwelling Unit (JADU). Also, multi-family lots may now add one ADU per every four existing residential units, so long as they were legally established.
Types of ADUs allowed:
Detached ADU, Attached ADU, Junior ADU are allowed. Accessory Dwelling Units may be new construction or converted from existing space. Junior ADUs 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. ~ According To AB68
ADU size:
Single-family and multi-family Lots will be allowed to build 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 JADU up to 500 sq.ft. is allowed. The minimum size of any living unit (including Accessory Dwelling Units and JADUs) is 150 sq.ft. according to California Residential Code. ~ Updated: State Law AB-68
Setbacks:
Setbacks for a detached new construction Accessory Dwelling Unit (ADU) shall be no more than 4 feet from the rear and side lot lines. No setbacks shall be required for Accessory Dwelling Unit (ADU)s and JADUs converted from legally eastablished existing space. Attached new construction Accessory Dwelling Unit (ADU)s and conversions from existing space to be expanded must comply with the setbacks of the underlying zone. ~ AB-68
Parking:
Replacement parking shall not apply to parcels which convert an existing garage to an Accessory Dwelling Unit or Junior Accessort Dwelling Unit (JADU). ~ Updated: State Law AB-68
Fire Safety:
Accessory dwelling units shall not be required to provide fire sprinklers if they are not required for the primary residence and may employ alternative methods for fire protection. (State requirements)
Shape, materials and style:
State Standards don't specify design restrictions.
Height:
State Standards don't specify height restrictions.
Design review:
State Standards don't require any additional design review.
Number of Bedrooms:
Not specified by State Standards.
Ownership:
Between between 2020 and 2025, owner occupancy requirements will not apply to new Accessory Dwelling Units. (applicable to new construction and conversion units) ~ Updated: State Law SB-13
Utility connections:
Local health officer approval where a private sewage disposal system is being used, if required. (State requirements)
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. ***
Residential Building Code:
The California Building Code (CBC) 2019 is adopted.
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ADU Model 576 sqft
24 ft x 24 ft
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24 ft x 22 ft
ADU Model 470 sqft
27 ft x 25 ft
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