Can I build an ADU in a historic district in Pomona?

Hello,

Navigating the process of building an Accessory Dwelling Unit (ADU) in a historic district can indeed present unique challenges, but with careful planning and understanding of the specific regulations, it’s definitely achievable. Here’s a detailed guide tailored to your situation in Pomona, California.

### Understanding Historic District Constraints

1. **Historic Preservation Guidelines**: In Pomona’s historic districts, any new construction, including ADUs, must adhere to guidelines that maintain the historic character of the neighborhood. This often means your ADU will need to complement the architectural style of your existing home and neighborhood. Expect requirements concerning materials, rooflines, windows, and exterior finishes.

2. **Design Review Process**: Before you can proceed, your project will likely require approval from the Pomona Historic Preservation Commission. This ensures that your design aligns with the district's aesthetic values. Be prepared to submit detailed architectural plans and possibly attend review meetings.

### ADU Regulations and Design Requirements

1. **Statewide ADU Laws**: California's SB-9 and AB-68 promote ADU development by relaxing certain restrictions, such as reduced setbacks and eliminating minimum lot size requirements. For example, statewide law allows for reduced side and rear setbacks to 4 feet.

2. **Pomona-Specific Requirements**: While state laws support ADU construction, Pomona may have additional local ordinances, particularly in historic districts. Typically, you’ll need to ensure your ADU doesn’t exceed a certain percentage of your existing home’s square footage, often up to 50%, with a maximum size of 1,200 square feet.

3. **Architectural Style and Materials**: To maintain the district's character, your ADU should reflect the style of your main house. Use similar siding materials, roof pitches, and colors. Consulting with a local architect familiar with Pomona’s historic guidelines can be invaluable here.

### Approval Process and Timelines

1. **Permitting Process**: Begin by contacting Pomona’s Planning Division for a pre-application meeting. This meeting will help you understand all necessary requirements and streamline your application process. Generally, obtaining approval in a historic district can take longer, potentially 4-6 months, due to the additional review layers.

2. **Streamlined Permitting**: California’s streamlined processes for ADUs (under laws like SB-1069) aim to reduce the time to 60 days for standard ADUs, but this might not fully apply in historic districts where additional scrutiny is required.

3. **Budget Considerations**: Your budget of $150,000 is a good starting point for a modestly sized ADU. Costs can vary significantly based on design complexity and materials, especially if you need to use premium materials to match historic aesthetics. Factor in potential additional costs for permits and design modifications.

### Tips and Common Mistakes

1. **Involve Experts Early**: Engage with architects and contractors experienced in historic districts and ADUs. Their insights can help anticipate challenges and avoid costly revisions.

2. **Community Engagement**: Sometimes, gaining community support can smooth the approval process. Engage with your neighborhood association or local historic groups to gather support or feedback on your plans.

3. **Documentation and Patience**: Keep detailed records of all communications and designs. Be prepared for a potentially slower process due to the necessary reviews.

### Next Steps and Resources

1. **Consult Local Resources**: Contact the Pomona Planning Division and Historic Preservation Commission early in your process. They can provide specific guidelines and application forms.

2. **Research Similar Projects**: Look at other ADUs in Pomona’s historic districts for inspiration and to understand what has been successfully approved.

3. **Educational Workshops**: Attend local workshops or webinars on ADU development, which often cover both general regulations and specific local considerations.

4. **California Department of Housing and Community Development (HCD)**: Their website offers resources that explain statewide ADU laws and can be a helpful reference.

By following these steps and guidelines, you can more confidently navigate the complexities of building an ADU in Pomona’s historic districts. Best of luck with your project—your parents will surely appreciate the new, thoughtfully integrated space!

Warm regards,

[Your Name]
ADU Consultant and Historic District Specialist