Can I add a second story to my garage for an ADU in Santa Clarita?

Hello and thank you for reaching out with your questions about adding a second story to your garage for an ADU in Santa Clarita. As someone who has navigated the ADU landscape in California, and specifically in Santa Clarita, I'm happy to provide some detailed guidance to help you move forward with your project.

### 1. Height and Setback Limitations

In Santa Clarita, ADU regulations are influenced by both state laws and local ordinances. Under California state law, particularly SB-13 and AB-68, there is a push to facilitate the creation of ADUs, making it somewhat easier to get approvals. However, local jurisdictions like Santa Clarita can impose specific height and setback limitations.

For a two-story ADU above a garage, Santa Clarita typically allows a maximum height of 16 feet for detached ADUs. However, some flexibility exists, and local ordinances may permit you to build up to 25 feet or match the primary dwelling's height if it allows for a better design fit with the neighborhood. Check directly with the Santa Clarita Planning Division to confirm these specifics, as they can vary slightly based on neighborhood zoning.

Setbacks are another critical factor. Generally, detached ADUs must maintain a minimum setback of 4 feet from side and rear property lines. For a structure like yours, which involves adding a second story, these setbacks are crucial to both adhere to regulations and ensure the structural integrity of the addition.

### 2. Permitting and Unexpected Costs

Permitting is often the most cumbersome part of the ADU process. From my experience in Santa Clarita, the permitting process can take anywhere from 3 to 6 months, depending on the complexity of your project and the current workload of the planning department.

Unexpected costs can arise in several areas:
- **Structural Reinforcement**: If your existing garage was not initially designed to support a second story, you might need significant structural modifications, which can add $10,000 to $20,000 to your project.
- **Utility Upgrades**: Connecting new plumbing and electrical systems can also be costly, with typical costs ranging from $5,000 to $15,000.
- **Permit Fees**: Expect to pay between $2,000 and $5,000 for permits, impact fees, and other related costs.

### 3. Design Considerations and Constraints

When converting a garage into a livable space, several design considerations come into play:
- **Insulation and Soundproofing**: Ensure that the design incorporates adequate insulation and soundproofing, especially for a second-story structure. This is crucial for both energy efficiency and comfort.
- **Plumbing**: Adding plumbing for a bathroom or kitchenette on a second floor can be challenging. Work with a licensed plumber to ensure proper routing and drainage.
- **Electrical**: An electrician will need to assess if your current electrical panel can handle the additional load. This might require an upgrade to your home's electrical system.

### Practical Tips and Common Mistakes

- **Engage with Local Professionals**: Consider hiring a local architect or contractor familiar with Santa Clarita ADU regulations. They can provide insights that might not be immediately apparent from the city's guidelines.
- **Budgeting**: With a project budget of $120,000, you are in a reasonable range for a second-story ADU, but it will require careful management to avoid overruns. Factor in a contingency of at least 10-15% for unexpected expenses.
- **Sustainability**: Consider incorporating sustainable design elements, such as solar panels or energy-efficient windows, which can provide long-term savings and comply with California's increasingly stringent energy regulations.

### Next Steps

1. **Consult with the Santa Clarita Planning Division**: This should be your first step to confirm zoning specifics and begin the permitting process.

2. **Hire a Professional**: Engage an architect or designer experienced in ADU projects. They can help streamline the design and permitting process.

3. **Prepare Your Finances**: Secure financing and establish a detailed budget with your contractor to ensure your project stays on track financially.

4. **Neighborhood Outreach**: While not required, discussing your plans with neighbors can preemptively address any concerns and foster goodwill.

### Resources

- **Santa Clarita Planning Division Website**: They provide resources and contact information for further inquiries.
- **California Department of Housing and Community Development (HCD)**: Offers detailed guidance on state ADU laws and regulations.

I hope this provides a clear path forward for your project. Best of luck with your ADU, and feel free to reach out with any more questions as you progress!