What setback requirements exist for ADUs in Pomona?

Hello,

Thank you for reaching out with your questions about building an Accessory Dwelling Unit (ADU) in Pomona, California. Navigating the regulations can indeed be daunting, but with the right information, you can proceed confidently and efficiently. Let’s break this down into manageable parts.

### Setback Requirements

**1. General Setback Rules:**
- **Side and Rear Setbacks:** California state law, particularly AB-68, mandates a minimum of four-foot setbacks from the side and rear property lines for ADUs. This law overrides more restrictive local ordinances, so you can rely on this as a baseline requirement in Pomona.
- **Front Setback:** The front setback typically follows the primary structure's zoning requirements. In residential zones in Pomona, this is usually around 15 to 20 feet, but it's best to confirm your specific zoning designation with the city’s planning department.

**2. Attached vs. Detached ADUs:**
- **Detached ADUs** will generally follow the four-foot side and rear setback rule.
- **Attached ADUs** must comply with the setbacks applicable to the primary dwelling, which may vary based on the specific zoning of your lot.

**3. Size Considerations:**
- The size of your ADU doesn’t directly affect setback requirements, but it does impact allowable floor area ratio (FAR) and lot coverage, which could indirectly influence where you can place your ADU. You can build up to 800 square feet by state law, but larger units may be possible depending on your lot size and local ordinances.

**4. Special Considerations:**
- **Existing Structures:** If you plan to convert existing structures (e.g., garages), the setback requirements may be more lenient. Often, converting existing structures doesn't require compliance with new setback rules.
- **Utility Easements:** Be cautious of utility easements on your property. Structures, including ADUs, generally cannot be built over these easements. Check your property’s title report or consult with a professional to identify any easements.

### Costs and Timelines

**1. Cost Estimates:**
- The cost of building an ADU in Pomona can range from $150,000 to $300,000 depending on size, design, and materials. Prefabricated units may offer some cost savings.

**2. Timeline:**
- From planning to completion, expect the process to take 12 to 18 months. This includes time for design, permitting, and construction.

### Local Considerations

- **Permitting Process:** Start by consulting with the Pomona Planning Division. They can provide specific guidance and ensure you're meeting all local requirements, including those related to historic districts or environmental considerations.
- **Utility Connections:** You may need separate utility connections for water, sewer, and electricity, which can add to your costs and timeline. Check with local utility providers for specific requirements.

### Practical Steps

1. **Research Local Ordinances:** Visit the City of Pomona’s website or contact their planning department for the most current ADU guidelines and to verify your zoning.
2. **Consult Professionals:** Hire an architect or ADU specialist familiar with Pomona’s regulations to help with design and permitting.
3. **Submit Plans:** Once your plans are ready, submit them for review. Pomona has streamlined processes to comply with state mandates, but it’s wise to be proactive in following up.
4. **Be Prepared for Inspections:** Plan for multiple inspections throughout the building process, which is standard to ensure compliance with building codes.

### Tips and Warnings

- **Common Mistakes:** Avoid starting construction without full approvals; even minor violations can lead to delays and additional costs.
- **State Laws vs. Local Ordinances:** Always check if the state law provides more favorable conditions than local laws. Recent laws like SB-9 and AB-68 are designed to simplify and promote ADU development.

### Next Steps

- **Consultation:** Schedule a meeting with the Pomona Planning Division for personalized advice.
- **Professional Help:** Consider hiring a project manager or contractor with experience in ADUs in Pomona to streamline the process.
- **Financing Options:** Look into local and state programs offering financing assistance for ADU construction.

By following these guidelines and doing your due diligence, you should be well on your way to successfully adding an ADU to your property. Best of luck with your project, and feel free to reach out with more questions!

Warm regards,

[Your Name]
ADU Consultant and Expert