Overview
Fontana is located in San Bernardino County in California. Fontana has a total
population of 196069 over a land mass of 42.43 Square Miles. When it comes to
ADUs, the city allows for 1+ ADUs on a given property, and a square footage of
850-1,000 sf
Types of ADUs Allowed
Detached, Junior, Attached
Number of ADUs allowed
According to state law, all single-family homes are allowed at least one
Accessory Dwelling Unit (ADU). Additionally, single-family properties which are
owner-occupied may create one Accessory Dwelling Unit (ADU) and one Junior
Accessory Dwelling Unit. Also, multi-family properties may now add one ADU per
every four existing residential units, so long as they were legally established.
Property Requirements
Residential lots will be allowed to create 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 Accessory Dwelling Unit is allowed up
to 500 square ft.. According to Califronia Residential Code, the minimum size of
any living unit is 150 square ft. (including ADUs and Junior Accessory Dwelling
Units). ~ AB-68
Types of ADUs Allowed
Attached ADU
An attached ADU is one that is attached to your house. Also know as Addition ADUs or “bump-out ADUs. These types of ADUs can be accessed from the primary house with a door in the connection point, but also can be independent of the main home.
Detached ADU
A detached ADU is not connected to your primary house. The dwelling needs to be within your property setbacks and allowable building size (both height and square footage).
Junior ADU
Junior Accessory Dwelling Units (JADUs) are named this way because they are small (up to 500 square feet).
In California, the recent state bills
AB68 and
AB 881 permits both an ADU and a Junior ADU (JADU) on the same lot with a proposed or existing single-family dwelling. This means you can have two units on your lot: ADU, and JADU.
Property Requirements
Ownership
Between between 2020 and 2025, owner occupancy requirements will not apply to
new Accessory Dwelling Unit (ADU)s. (applicable to new construction and
conversion units) ~ SB-13
Number of ADUs Allowed
According to state law, all single-family homes are allowed at least one
Accessory Dwelling Unit (ADU). Additionally, single-family properties which are
owner-occupied may create one Accessory Dwelling Unit (ADU) and one Junior
Accessory Dwelling Unit. Also, multi-family properties may now add one ADU per
every four existing residential units, so long as they were legally established.
ADU Size
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. ~ AB-68
Parking
Lots which convert an existing garage to an Accessory Dwelling Unit (ADU) or
Junior Accessort Dwelling Unit (JADU) will not be subject to replacement parking
requirements. ~ According To AB68
Height
The height of the ADU shall be restricted to the maximum height of the
applicable zone.
Fire Safety
The ADU will not need fire sprinklers as long as the primary home does not
require them.
Utility Connections
Local health officer approval where a private sewage disposal system is being
used, if required. (State requirements)
Aesthetic
The Director of Community Development shall review and make a determination of
the architectural features of all accessory dwelling units. The ADU shall be
compatible with the design, materials and color of the primary home. If the
accessory dwelling unit is physically detached from the primary dwelling unit, a
breezeway connecting the two structures may be constructed subject to review and
approval by the Director of Community Development.
Set backs
The maximum required setback for a detached new construction Accessory Dwelling
Unit shall be no more than 4 feet from the rear and side property lines.
Setbacks will not be required for Accessory Dwelling Units and JADUs converted
from existing space that was legally eastablished. Attached Accessory Dwelling
Units and conversions from existing space to be expanded will be required to
comply with the setbacks of the underlying zone. ~ According To AB68
Design Review
Applications for ADUs shall be approved, without discretion in less than 120
days, according to state law. In cases where the existing single-family home on
a single lot meets the requirements of an accessory dwelling unit an ADU unit
can be constructed as a, "first unit" provided all of the development standards
in this Article are met.
Next Steps
To get started on your ADU, here are some first steps.
Call Your City
Search Google for your city’s contact number. eg “City of {Phoenix} Residential Permits Contact Number”
You can call the main line and get directed to the permitting department.
Ask these questions...
1) Can I put a secondary home on my lot (Accessory Dwelling Unit)?
2) What are my livable setbacks, and ADU size regulations?
3) Can I put a prefabricated guest house on my property?
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