Overview
Rancho Cucamonga is located in San Bernardino County in California. Rancho
Cucamonga has a total population of 165269 over a land mass of 39.85 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
Under state law, each single-family home may now construct at least one
Accessory Dwelling Unit (ADU). Owner occupied single-family properties may
construct one Accessory Dwelling Unit (ADU) and one Junior ADU. Multi-family
properties, per every four existing residential units, may construct one
Accessory Dwelling Unit (ADU), so long as the existing units were legally
established.
Property Requirements
Single-family and multi-family Properties will be allowed to construct 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 Accessory Dwelling
Unit up to 500 sq. ft. is allowed. The minimum size of any living unit
(including ADUs and Junior Accessory Dwelling Units) is 150 sq. ft. according to
Califronia Residential Code. ~ According To AB68
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 Units. (applicable to new construction and conversion
units) ~ Updated: State Law SB-13
Number of ADUs Allowed
Under state law, each single-family home may now construct at least one
Accessory Dwelling Unit (ADU). Owner occupied single-family properties may
construct one Accessory Dwelling Unit (ADU) and one Junior ADU. Multi-family
properties, per every four existing residential units, may construct one
Accessory Dwelling Unit (ADU), so long as the existing units were legally
established.
ADU Size
Residential parcels will not be subject to any minimum lot size for Accessory
Dwelling Units by ordinance or of the underlying zoning district. ~ Updated:
State Law 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). ~ AB-68
Height
State Standards don't specify height restrictions.
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)
Utility Connections
Local health officer approval where a private sewage disposal system is being
used, if required. (State requirements)
Aesthetic
State Standards don't specify design restrictions.
Set backs
Setbacks for a detached new construction ADU shall be no more than 4 ft from the
rear and side lot lines. No setbacks shall be required for ADUs and Junior
Accessort Dwelling Unit (JADU)s converted from legally eastablished existing
space. Attached new construction ADUs and conversions from existing space to be
expanded must comply with the setbacks of the underlying zone. ~ AB68 & AB881
Update
Design Review
State Standards don't require any additional design review.
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?
.webp)
.webp)
-(1).webp)
