Can I have multiple ADUs on one lot in Pomona?

Hello and thank you for reaching out with your questions about building multiple Accessory Dwelling Units (ADUs) on your property in Pomona, CA. You’re right that California’s recent legislative changes have made it easier to construct ADUs, but local interpretations can vary, so let’s dive into your questions.

### Can I Build Multiple ADUs on My Lot?

Under California state law (SB-13, AB-68, AB-881), homeowners have the potential to build two types of ADUs on a single-family lot: one standard ADU and one Junior ADU (JADU). The standard ADU can be detached, attached, or a conversion of existing space, while a JADU is typically a conversion of existing space within the primary dwelling.

Your lot size of 10,500 square feet provides a good amount of space, but Pomona’s specific zoning may still impact what you can do. Pomona generally adheres to state guidelines, but always check with the Pomona Planning Division for any amendments or additional requirements.

### Specific Requirements

1. **Lot Coverage and Setbacks**:
- **Lot Coverage**: Pomona may have specific lot coverage limitations that you should verify with the City Planning Department. Generally, ADUs must not exceed 50% of the existing primary dwelling’s living area or 1,200 square feet, whichever is less.
- **Setbacks**: State law requires a minimum of 4-foot side and rear setbacks for new detached ADUs. However, existing legal structures converted into ADUs may have different requirements.

2. **Height and Size**:
- Detached ADUs can often reach a height of up to 16 feet, which is standard, but always confirm if local ordinances have stricter limits.

### Permitting Process and Timelines

- **Permits**: You'll need building, electrical, plumbing, and mechanical permits. Pomona's Building and Safety Division will be your go-to for these. They usually require detailed plans, including site plans and floor plans.
- **Timeline**: Typically, the permitting process can take anywhere from 2 to 4 months. Construction, depending on complexity, can range from 6 to 12 months. It's best to allow a buffer for unforeseen delays.

### Financial Considerations

- **Cost**: With a budget of $200,000, you're in a good position. ADU construction costs in Pomona generally range from $150 to $300 per square foot, depending on finishes and complexity. Keep in mind additional costs for landscaping, utility hookups, and any necessary site preparation.

- **Incentives and Grants**: While specific grants for ADUs in Pomona may be limited, California offers some financing options, such as CalHFA’s ADU Grant Program, providing up to $40,000 for pre-development costs. Check both state and local resources for updates on incentives.

### Next Steps

1. **Consult with Professionals**: Engage with a local architect or an ADU specialist who understands Pomona’s specific regulations. They can help streamline the design and permitting process.

2. **Contact the Pomona Planning Division**: Directly reach out to them to confirm any local ordinances that could influence your project. They can provide the most accurate, up-to-date information.

3. **Consider a Pre-Application Meeting**: Pomona offers pre-application consultations which can be invaluable for understanding site-specific considerations and potential challenges.

4. **Explore Financing Options**: Beyond personal savings, consider financing through home equity loans or construction loans. Some local banks might offer favorable terms for ADU projects.

### Tips and Common Pitfalls

- **Ensure Compliance**: Always double-check zoning requirements and any deed restrictions on your property.
- **Utility Connections**: Plan for possible upgrades to your utility connections to handle additional demand.
- **Neighbor Relations**: Consider discussing your plans with neighbors early to ensure support, especially if you’ll need temporary access for construction.

Building multiple ADUs in Pomona can add significant value to your property and provide additional income opportunities. By following these guidelines and utilizing available resources, you'll be well-prepared to navigate the process efficiently.

Good luck with your ADU project, and feel free to reach out if you have more questions or need further assistance!