What are the lot coverage limits for ADUs in Pomona?

Hello,

I'm glad to hear about your interest in adding an ADU to your property in Pomona. Navigating the regulatory environment can indeed be complex, but I’m here to help break it down for you. Let's tackle your questions one by one.

### 1. Lot Coverage Calculation in Pomona

In Pomona, like many California cities, lot coverage is typically calculated by determining the percentage of your lot that is covered by buildings and structures. This includes your primary residence, any garages, sheds, and proposed ADUs. However, it generally does not include driveways, walkways, patios, pools, or other similar features unless they are covered structures.

For your 7,500 square foot lot, the specific lot coverage limits will be detailed in the Pomona municipal code, usually around 40-50% for residential zones. This would mean you could potentially cover 3,000 to 3,750 square feet of your lot with structures. However, always verify the exact percentage with the city’s planning department to ensure accuracy.

### 2. Detached vs. Converted ADUs

The regulations can indeed differ between detached ADUs and converted structures. For detached ADUs, setbacks, height restrictions, and lot coverage limits are more strictly applied. Pomona follows California state laws like AB-68, which allows for streamlined approvals of ADUs under 1,200 square feet, but local regulations might impose additional restrictions based on specific neighborhood guidelines.

Converting an existing structure like a garage often has more leniency in terms of setbacks and lot coverage because the structure is already present. However, this still must comply with building codes and safety standards, such as seismic retrofitting and proper insulation.

### 3. Variances and Exceptions

If you find yourself slightly over the lot coverage limit, you might be able to apply for a variance. Variances are exceptions granted by the city, but they typically require a demonstration of unique hardships or circumstances that justify the deviation from standard regulations. The process includes submitting a detailed application, paying a fee (which can range from $1,000 to $3,000), and potentially attending public hearings.

It's critical to consult with a local architect or planning consultant who knows Pomona's specific processes to improve your chances of approval and to ensure your application is complete and persuasive.

### 4. Enforcement and Common Pitfalls

Pomona enforces these regulations through both plan reviews and inspections. Common pitfalls include:

- **Incomplete applications:** Make sure all your documentation is complete before submission.
- **Ignoring neighborhood-specific guidelines:** Some neighborhoods have additional restrictions.
- **Assuming state laws override local rules:** While state laws like SB-9 and AB-68 promote ADU development, local zoning can still impose stricter requirements.

### Practical Tips and Next Steps

- **Consult with Local Experts:** Engage a local architect or ADU consultant who is familiar with Pomona's specific requirements. This can save time and help avoid costly mistakes.
- **Visit the Planning Department:** Schedule a pre-application meeting with Pomona’s planning department. They can provide valuable insights specific to your property and streamline your application process.
- **Budget Wisely:** With a $150,000 budget, focus on efficient design to maximize space without unnecessary costs. Construction costs in Pomona typically range from $200 to $300 per square foot, which means your budget could realistically cover a 500 to 750 square foot ADU, depending on finishes and site conditions.
- **Consider Prefabricated ADUs:** These can often be a cost-effective and quicker option, reducing both construction time and permitting complexity.

### Resources and Further Reading

- **Pomona's Municipal Code:** For detailed zoning and building regulations.
- **Consultants:** Reach out to local ADU specialists or architects who have experience with Pomona's permitting process.
- **California Department of Housing and Community Development (HCD):** For understanding state-level ADU regulations and support.

Approaching this project with thorough preparation and local insight will help you achieve a successful ADU build. Best of luck with your project, and don't hesitate to reach out if you have more questions down the road!

Warm regards,

[Your Name]
ADU Consultant and Expert