abodu
What are the requirements to build ADU in San Dimas?
Constructing an ADU in San Dimas allows you to increase your living area and enhance property value and resale potential. For a successful ADU project, it's crucial to be familiar with local regulations and assess the financial aspects of building in San Dimas. This guide offers detailed information on San Dimas’ ADU rules and key financial considerations, assisting you in effectively planning and completing your project.
ADU regulations for properties with a single-family home
How many ADUs can you build in San Dimas?
In San Dimas, only one ADU is allowed per property with a single-family residence. This ADU can be either attached or detached from the primary building.
How large can an attached ADU be in San Dimas?
In San Dimas, attached ADUs can be up to 50 percent of the size of the existing primary dwelling. Studios or one-bedroom units have a maximum size of 850 square feet, or 1,000 square feet for multi-bedroom units, with a minimum of 800 square feet allowed regardless of these limits.
How large can a detached ADU be in San Dimas?
Detached ADUs in San Dimas can be a maximum of 850 square feet for a studio or one-bedroom unit, or 1,000 square feet for a multi-bedroom unit.
Can I build a 2-story ADU in San Dimas?
Yes, you can construct a two-story ADU in San Dimas.
Is there a minimum size for an ADU?
The minimum size for an ADU in San Dimas is 220 square feet.
Can I convert the existing space to an ADU?
Yes, in San Dimas, it's allowed to convert existing areas into ADUs on single-family lots.
What is the maximum height for an ADU?
The maximum height for an ADU on a single-family property is typically 35 feet, according to zoning regulations. If there's a religious structure on the property, height may increase to 45 feet with a steeple or similar feature. Corner lots are limited to a maximum height of 16 feet within the street-side setback.
ADU regulations for properties with a multi-family building
How many ADUs does San Dimas allow for multifamily properties?
Multifamily properties can have at least one ADU within the existing structure, but the total number of ADUs cannot exceed 25 percent of the current dwelling units. Additionally, up to two detached ADUs are allowed.
How large can an attached ADU for a multifamily building be in San Dimas?
In San Dimas, the attached ADUs for multifamily buildings cannot be larger than 50 percent of the existing primary dwelling. Studios or one-bedroom units are limited to 850 square feet, while multi-bedroom units can reach up to 1,000 square feet. However, a minimum size of 800 square feet is allowed, regardless of these restrictions.
How large can a detached ADU for a multifamily building be in San Dimas?
In San Dimas, detached ADUs for multifamily buildings can reach a maximum of 850 square feet for a studio or one-bedroom unit, or 1,000 square feet for a multi-bedroom unit.
Can I stack detached ADUs on top of each other?
No, San Dimas does not allow for stacking detached ADUs on top of each other. Regulations allow adding an ADU above an existing detached structure like a garage.
Can I attach two ADUs to each other?
In San Dimas, attaching two ADUs is not allowed. The city's regulations specify that ADUs should be attached to the main unit.
Can I convert the existing space to an ADU?
Yes, in San Dimas, it's allowed to convert existing areas into ADUs on multifamily lots.
What is the maximum height for an ADU on a property with a multi-family building
For multifamily properties, the height requirement is the same as for single-family houses.
What ADU types are allowed to build in San Dimas?
In San Dimas, homeowners have several choices for adding an ADU to their property:
(A) Detached ADU: A separate structure that is not connected to the main house.
(B) Attached ADU: A unit that is either connected to or integrated into the existing home.
(C) Converted ADU: Converting existing spaces, such as garages or sheds, into livable areas with necessary amenities like kitchens and bathrooms.
Homeowners can either build a new ADU or modify an existing structure. Converting spaces like garages or sheds can have advantages, such as avoiding specific zoning regulations like setbacks or height limits, and may allow for smaller additions. However, upgrading older buildings may uncover unforeseen challenges that could increase costs.
ADU setbacks from the property lines and other buildings
What are the required setbacks for an ADU in San Dimas?
Front yard setbacks are 20 feet, with rear and side yard setbacks at 4 feet. Regulations for corner or through lots are not specifically outlined by the city.
What is the minimum distance the ADU must have from the existing structures?
The ADU should maintain a minimum distance of 6 feet from existing structures in San Dimas.
Are setbacks required when converting existing structures into ADU?
No, for an existing garage converted into an ADU, no additional setback is needed. However, for an ADU constructed above a garage, a setback of no more than 4 feet from side and/or rear lot lines is allowed.
Can I build an ADU in the front yard of my house in San Dimas?
Yes, you can build an ADU in the front yard, but only if there is no other suitable location on the property for a minimum 800 sq ft ADU. You will need to follow the zoning setback requirements.
Design requirements for ADU
How many bedrooms can an ADU have?
In San Dimas, an ADU can have at least one bedroom, unless it's proposed as a studio unit.
Does an ADU need to have a kitchen?
Yes, in San Dimas, an ADU needs a kitchen containing a stove, room for a refrigerator, and counter space.
Does an ADU require independent utility meters?
Yes, in cases where the ADU is attached or detached, there may be a need for a new or separate utility meter.
What is the minimum ceiling height?
According to the California Building Code, living spaces in San Dimas, including ADUs, should have a minimum ceiling height of 7 feet.
Find out the maximum ADU size for your property here
The parking requirements for ADU
What is the parking requirement for an ADU in San Dimas?
There's no need for additional parking for an ADU in San Dimas.
Where can I have a parking space on my property?
San Dimas doesn't specify parking space locations. However, if needed, in many Los Angeles County cities, parking can usually be in setbacks or existing driveways, often as tandem parking if necessary.
How to get permits for your ADU
How long does it take to get an ADU permit in San Dimas?
In San Dimas, securing an ADU permit typically takes about 3.5 to 4 months. It's advisable to consult with a city planner before submitting your plans to ensure they meet all requirements.
Once you submit your plans and pay the required fees, the city has 60 days to verify that your application is complete. If there is no response within that period, your permit will be automatically approved. If changes are necessary, you will need to revise and resubmit your plans. Missing information won't result in denial, but it should be corrected. The estimated Plan Check fee for ADU projects in San Dimas is $2,230.
Does San Dimas require in-person submission of plans for an ADU?
Yes, in San Dimas, submitting plans for an ADU should be done in person to the city's Planning Division, as electronic submission is not yet available. These plans should demonstrate compliance with local zoning regulations and guidelines.
Does San Dimas require coastal development permits?
San Dimas does not require coastal development permits in any of its areas.
When do you need a licensed professional to design an ADU in San Dimas?
In San Dimas, the requirement for a licensed professional to design an ADU is based on how complex the project is.
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How much does it cost to build an ADU in San Dimas?
The cost to construct an ADU in San Dimas is typically around $380 per square foot. This estimate includes expenses for permits, architectural design, and engineering services. For example, the overall cost for a 900-square-foot ADU generally comes to approximately $390,000, covering both direct and incidental expenses.
Is it profitable to build an ADU in San Dimas?
Evaluating the profitability of constructing an ADU in San Dimas involves comparing construction costs with local real estate market values. For instance, a 900-square-foot ADU might have a market value of around $450,000. With construction expenses of about $390,000, this suggests a potential return on investment of 15%.
Moreover, profitability can also be assessed by considering potential rental income or the advantages of having family members reside on the same property.
Can you sell an ADU in San Dimas?
Under California's AB 1033, local governments can create rules for selling ADUs as condominiums in conjunction with primary residences, as long as they follow existing ADU laws.
In San Dimas, local regulations govern the sale of ADUs. Units may be sold if constructed by an accredited nonprofit organization. Furthermore, sales can occur through a tenancy-in-common agreement or if the city allows the ADU and the primary residence to be sold as separate condominium units.
Are ADUs rent-controlled in San Dimas?
ADUs in San Dimas are not under rent control regulations. They are classified as new constructions, exempting them from laws like AB 1482, which allows landlords to annually adjust rents. However, this exemption applies only to structures that are at least 15 years old.
How do I get money to build an ADU in San Dimas?
For homeowners seeking funding to build an ADU in San Dimas, one option is to apply for the CalHFA's ADU grant program, facilitated by the California Community Economic Development Association (CCEDA). This program offers grants of $40,000 to qualified homeowners to cover pre-construction expenses associated with ADU construction. It's important to note that 54% of these grants are allocated to low-income households, to improve affordability.
Find out how much value an ADU could add to your property.
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