Protect Your Accessory Dwelling Unit (ADU), Rental Income & Investment
Accessory Dwelling Units (ADUs) have become one of the most valuable investments for Orange County homeowners. Whether you’ve built a backyard cottage, casita, garage conversion, in-law suite, granny flat, or detached guest house, your insurance should be updated to match how the property is actually being used.
Unfortunately, many homeowners spend $150,000–$500,000+ building an ADU but never update their insurance policy. If a loss occurs, being underinsured or failing to disclose the ADU to your insurance company can create significant coverage issues.
At Starwest Insurance Services, we specialize in ADU insurance throughout Orange County and help homeowners protect both their primary residence and their accessory dwelling unit.
What Is an ADU?
An Accessory Dwelling Unit (ADU) is a secondary residential unit located on the same property as a primary residence.
Common examples include:
- Detached backyard homes
- Garage conversions
- Casitas
- In-law suites
- Granny flats
- Above-garage apartments
- Attached ADUs
- Pool houses converted into living space
Many homeowners build ADUs to:
- Generate rental income
- House aging parents
- Provide housing for adult children
- Increase property value
- Create multigenerational living arrangements
Does Homeowners Insurance Automatically Cover an ADU?
Not always.
One of the biggest misconceptions is that building an ADU automatically extends coverage under your existing homeowners policy.
Many insurance companies require you to notify them when:
- You build an ADU
- You convert a garage
- You begin renting the unit
- The occupancy changes
- You use it as an Airbnb or short-term rental
If the insurer is not aware of these changes, your coverage may not reflect your property’s actual use.
We Help Insure Every Type of ADU
We help Orange County homeowners insure:
Family ADUs
For:
- Parents
- Grandparents
- Adult children
- Relatives
Rental ADUs
Long-term rental units used to generate monthly rental income.
Guest Houses
Separate living quarters for guests.
Airbnb & Short-Term Rental ADUs
If your ADU is rented on:
- Airbnb
- VRBO
- Furnished Finder
- Booking.com
you may need specialized insurance because many standard homeowners policies have restrictions on short-term rentals.
Important Coverages for ADU Owners
Depending on the insurance company and how your ADU is used, coverage may include:
Dwelling Coverage
Protects the structure after covered losses.
Other Structures
May protect detached garages, fences, and additional structures.
Personal Property
Coverage for:
- Appliances
- Furniture
- Electronics
- Kitchen equipment
- Window coverings
- Outdoor furnishings
Liability Protection
Helps protect you if someone is injured on your property and you’re legally responsible.
Loss of Rental Income
If your tenant must move out because of a covered claim, some landlord policies may reimburse lost rental income while repairs are made, subject to policy terms.
Building an ADU? Don’t Forget Builder’s Risk Insurance
If your ADU is still under construction, you may also need Builder’s Risk Insurance.
Builder’s Risk Insurance can help protect your project from covered losses such as:
- Fire
- Theft of building materials
- Wind
- Vandalism
- Certain weather-related damage during construction
Before construction begins, it’s important to discuss insurance with both your contractor and your insurance advisor.
High Fire Areas & California FAIR Plan
Some Orange County properties located near brush or wildfire-prone areas may have difficulty obtaining traditional homeowners insurance.
In these situations, we may recommend:
- California FAIR Plan
- Difference in Conditions (DIC) Policy
- Specialty Property Markets
We’ll review all available options before recommending the FAIR Plan.
Why Work With an ADU Insurance Specialist?
Every ADU is different.
We consider:
- Detached vs. Attached ADU
- Owner Occupied vs. Rental
- Family Occupancy
- Long-Term Rental
- Airbnb
- Construction Cost
- Replacement Cost
- Liability Exposure
- Rental Income
- Property Value
Properly structuring your insurance now can help avoid costly surprises later.
Why Choose Starwest Insurance Services?
Since 1995, we’ve helped California homeowners insure unique and hard-to-place properties.
Why clients choose us:
✔ No Broker Fees Since 1995
✔ Independent Insurance Agency
✔ Compare Multiple Insurance Companies
✔ ADU Insurance Specialists
✔ Landlord Insurance Experts
✔ California FAIR Plan Specialists
✔ Builder’s Risk Insurance
✔ Umbrella Insurance
✔ Personalized Coverage Reviews
Proudly Serving All of Orange County
Including:
- Anaheim
- Irvine
- Huntington Beach
- Westminster
- Garden Grove
- Orange
- Fullerton
- Fountain Valley
- Costa Mesa
- Newport Beach
- Yorba Linda
- Cypress
- Mission Viejo
- Lake Forest
- Seal Beach
- Tustin
Frequently Asked Questions
Do I need to tell my insurance company that I built an ADU?
Yes. Anytime you add an ADU or significantly change the use of your property, notify your insurance company or agent. Coverage may need to be updated to reflect the added structure and its occupancy.
What if I rent my ADU?
If your ADU is rented to tenants, a landlord or specially structured policy may be more appropriate than a standard homeowners policy, depending on the insurer and occupancy.
What if I use Airbnb?
Many companies have restrictions regarding short-term rentals.
We’ll help determine whether your insurance company allows Airbnb and whether additional coverage is needed.
Can an ADU increase my home’s replacement cost?
Absolutely.
Adding an ADU often increases the cost to rebuild your property after a total loss. Your dwelling coverage should be reviewed and updated whenever you complete a major addition.
Helpful Resources
Starwest Insurance Services
Continue learning with these helpful guides:
ADU & Rental Property Insurance
- ADU Insurance Guide
https://www.starwestinsurance.com/adu-insurance-specialist-in-orange-county-ca-2026-guide/ - ADU Insurance in Orange County
https://www.starwestinsurance.com/adu-insurance-in-orange-county-ca-2026-guide-how-to-properly-protect-your-rental-property/ - Landlord Insurance Specialist
https://www.starwestinsurance.com/landlord-insurance/ - Short-Term Rental Insurance
https://www.starwestinsurance.com/short-term-rental-home-insurance-specialist-in-anaheim-ca/ - California FAIR Plan Guide
https://www.starwestinsurance.com/the-california-fair-plan-in-orange-county-ca/ - California FAIR Plan + DIC Insurance Explained
https://www.starwestinsurance.com/california-fair-plan-difference-in-conditions-dic-insurance-explained/ - Umbrella Insurance
https://www.starwestinsurance.com/umbrella-insurance/ - Builder’s Risk Insurance
https://www.starwestinsurance.com/builders-risk-insurance/ - Homeowners Insurance
https://www.starwestinsurance.com/homeowners-insurance/
ADU Planning Resources
If you’re planning to build an ADU or want to learn more about ADU design, construction, financing, and maximizing your property’s value, visit:
ADU Realtor Network
https://www.adurealtor.net/
This website offers valuable resources for homeowners considering an ADU project, including planning ideas, investment strategies, and information about California ADUs.
Get a Free ADU Insurance Review
Whether your ADU is used for family, rental income, or future investment, we’ll help make sure your insurance keeps up with your property.
We’ll review your current policy, compare multiple insurance companies, and recommend coverage that fits your needs.
Contact Starwest Insurance Services
James C.Q. Banh
Starwest Insurance Services
📍 13752 Goldenwest St.
Westminster, CA 92683
☎ Office: (714) 893-7271
📱 Cell: (714) 231-0897
🌐 https://www.starwestinsurance.com