What are the parking requirements for ADUs in Santa Ana?

Richard Moore

October 19, 2025 at 10:26 PM

Design & Planning Santa Ana, CA

Hello everyone,

I'm planning to build an ADU on my property in Santa Ana, and while I've done some initial research, I'm still a bit confused about the parking requirements. I live on a relatively small lot, about 6,000 square feet, and there's currently just a single driveway for our main house. My budget is stretched, so I want to ensure I'm complying with city regulations without unnecessary expenses.

I've read that Santa Ana has specific rules about parking for ADUs, but I'm not entirely sure how they apply to my situation. For example, are there any exemptions if my home is near public transit? Also, does the size of the ADU affect the parking requirements? We’re considering an ADU that's around 800 square feet.

Additionally, I'm curious if there are any design considerations I should be aware of that could impact the parking layout. Does having an existing garage on the property ease any of these requirements?

Any insights or experiences from those who’ve navigated Santa Ana's ADU parking regulations would be greatly appreciated. I want to make sure I'm planning correctly and avoid any compliance issues down the road. Thanks in advance for your help!

1 Answer

Nick

October 19, 2025 at 12:45 AM

Hello,

Building an ADU in Santa Ana is an exciting project, and understanding parking requirements is crucial for compliance and budgeting. Let's break down what you need to know regarding parking for your ADU.

### Parking Requirements in Santa Ana

Santa Ana follows California state laws closely, particularly those influenced by recent legislation like **SB-9** and **AB-68**, which aim to streamline ADU construction. Generally, Santa Ana requires one parking space per ADU. However, there are several exemptions where no additional parking is required:

1. **Proximity to Public Transit**: If your property is located within half a mile of public transit, you are exempt from providing additional parking for your ADU. Santa Ana has a number of bus routes and public transit options, so check a detailed map or consult with the Santa Ana Planning Division to see if your property qualifies.

2. **Existing Structures**: If your property has an existing garage or carport that you plan to convert into an ADU, you are not required to replace those parking spaces. This can be a significant cost and space saver.

3. **Car Share Programs**: If your home is within one block of a car share vehicle location, you are also exempt from the additional parking requirement.

### Size and Design Considerations

For an ADU around 800 square feet, the size itself doesn't directly impact parking requirements; the exemptions and requirements mentioned above remain applicable regardless of ADU size. However, consider the following design elements:

- **Use of Existing Driveway**: Since your lot is 6,000 square feet with a single driveway, ensure that any new parking arrangements do not violate local zoning ordinances. It might be possible to expand your driveway slightly or use tandem parking as a solution.

- **ADU Placement**: Situate the ADU in a way that maximizes available space. Placing it towards the rear of your lot might allow more flexibility for parking arrangements.

### Cost and Timeline Considerations

- **Parking Space Costs**: If you need to add a parking space, costs can vary depending on materials and labor. A simple gravel parking pad might cost as low as $1,500-$3,000, while a paved driveway extension could range from $5,000-$10,000.

- **Timeline**: The permitting process in Santa Ana for ADUs, including parking considerations, typically takes 3-6 months. This includes time for plan submission, reviews, and any necessary revisions.

### Next Steps

1. **Consult with the Santa Ana Planning Division**: Before finalizing any plans, confirm your property's eligibility for parking exemptions. They can provide specific guidance based on your location and circumstances.

2. **Work with an Architect or ADU Specialist**: Given the complexities of ADU design and compliance, hiring a professional familiar with Santa Ana's requirements can be beneficial. They can help optimize your layout to maximize space and minimize costs.

3. **Public Transit Verification**: Use online tools or contact local transit authorities to verify your proximity to public transit options.

4. **Attend Local Workshops or Seminars**: Santa Ana occasionally hosts informational sessions on ADU development. These can be excellent resources for up-to-date information and networking with professionals.

### Common Mistakes to Avoid

- **Ignoring Local Ordinances**: While state laws provide a framework, local ordinances can add additional layers of regulation. Always cross-reference state laws with local rules.

- **Overlooking Utility Considerations**: Parking isn't the only factor in play. Ensure your plans account for utility access and other infrastructural needs.

- **Assuming Exemptions Automatically Apply**: Always get confirmation in writing from the Planning Division regarding any applicable exemptions.

### Additional Resources

- **Santa Ana Planning Division**: [City of Santa Ana Planning](https://www.santa-ana.org/planning-division)
- **California Department of Housing and Community Development**: [ADU Handbook](https://www.hcd.ca.gov/policy-research/accessorydwellingunits.shtml)

Building an ADU can be a complex process, but with careful planning and attention to local regulations, you can create a compliant and functional space. Good luck with your project, and feel free to reach out with further questions!

Warm regards,

[Your Name]
ADU Consultant

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Understanding the different types of Accessory Dwelling Units can help you choose the best option for your property and needs.

Detached ADU

A separate, standalone structure built on your property. Offers maximum privacy and flexibility for tenants.

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Attached ADU

An addition to your existing home with a separate entrance. Cost-effective option with shared utilities.

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ADU Type	Size Range	Cost Range	Timeline	Best For
Garage Conversion	400-800 sq ft	$80K - $150K	3-6 months	Budget-conscious homeowners
JADU	Up to 500 sq ft	$50K - $100K	2-4 months	Family use, minimal disruption
Attached ADU	600-1,000 sq ft	$120K - $200K	4-8 months	Shared utilities, family proximity
Detached ADU	600-1,200 sq ft	$150K - $300K	6-12 months	Maximum rental income
Two-Story ADU	800-1,500 sq ft	$200K - $400K	8-15 months	Maximizing property value

Cost Factors to Consider

Site Preparation: $5K - $25K
Permits & Fees: $3K - $15K
Utility Connections: $5K - $20K
Finish Level: $10K - $50K variance
Landscaping: $2K - $10K

Potential ROI

Rental Income: $1,500 - $4,000/month
Property Value Increase: 20-30%
Payback Period: 8-15 years
Tax Benefits: Depreciation allowances
Equity Growth: Long-term appreciation

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These are general ranges. Your actual costs may vary based on specific site conditions, design choices, and local market factors in Santa Ana.

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Why Build an ADU in Santa Ana?

Financial Benefits

Rental Income: Generate $18,000-$48,000 annually

Property Value: Increase home value by 20-30%

Tax Benefits: Depreciation and expense deductions

Investment: Strong ROI in California markets

Lifestyle Benefits

Multigenerational Living: Keep family close while maintaining privacy

Home Office: Create dedicated workspace or studio

Guest Space: Comfortable accommodations for visitors

Sustainability: Increase housing density efficiently

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Types of ADUs in Santa Ana, CA

Understanding the different types of Accessory Dwelling Units available in Santa Ana, CA can help you choose the best option for your property and budget.