Can I have multiple ADUs on one lot in San Diego?

Hello there!

You're asking some great questions, and it's clear you're doing your homework on the possibilities for adding multiple ADUs to your San Diego property. Given that San Diego has indeed been encouraging the development of ADUs to tackle the housing shortage, you're on the right track. Let's dive into the specifics to help you navigate this process.

### Can You Build Multiple ADUs?

Yes, you can build multiple ADUs on a single lot in San Diego, but there are specific conditions and regulations you'll need to follow:

1. **Zoning and Lot Size**: San Diego's zoning laws, influenced by California State laws like SB-9 and AB-68, allow more flexibility. Generally, for a lot like yours (10,000 sq ft), you could potentially build both a detached ADU and a Junior ADU (JADU). The detached ADU can be up to 1,200 sq ft, and a JADU is typically up to 500 sq ft and must be part of an existing or proposed single-family dwelling.

2. **Maximum ADU Count**: San Diego typically allows for one ADU and one JADU on a single-family lot. However, under certain conditions and zoning allowances, you might be able to add more. Check with the City of San Diego’s Development Services Department for specific allowances on your property.

### Property Taxes and Utility Connections

1. **Property Taxes**: Adding ADUs will likely increase your property value, thereby affecting your property taxes. In California, property taxes are reassessed based on the added value of the new construction. Consult with a local property tax expert to get a precise estimate based on your intended project specifics.

2. **Utility Connections**: For each ADU, separate utility connections are not necessarily required but can be beneficial. This is especially true if you plan to rent them out, as separate meters can simplify billing. Installing separate meters does increase upfront costs—expect to pay about $5,000-$10,000 per meter for water, electricity, and gas connections.

### Setbacks and Square Footage

1. **Setbacks**: San Diego's setbacks for ADUs are typically 4 feet from the rear and side property lines. Ensure compliance to avoid future issues.

2. **Square Footage**: As mentioned, detached ADUs can be up to 1,200 sq ft, but the total combined square footage of all ADUs on a lot should not exceed 50% of the existing primary dwelling's living area unless the ADU is 800 sq ft or smaller.

### Costs and Timelines

1. **Costs**: With a $300,000 budget, you’re in a good position. Current estimates for building an ADU in San Diego range from $150,000 to $300,000 depending on size, finishes, and complexity. A JADU will be less expensive, typically ranging from $50,000 to $100,000.

2. **Timelines**: The design, permitting, and construction process for ADUs generally takes 8-18 months. The permitting process alone can take 3-6 months, so planning ahead is crucial.

### Next Steps

1. **Site Evaluation**: Hire a local architect or ADU specialist to conduct a site evaluation. They’ll help identify potential constraints and opportunities based on your lot's specific characteristics.

2. **Consult with the City**: Engage with San Diego's Development Services Department early to understand specific zoning requirements and obtain necessary permits.

3. **Hire Professionals**: Work with experienced architects, contractors, and ADU specialists who have a track record in San Diego. They can help avoid common pitfalls and streamline the process.

4. **Financing Options**: Explore financing options if needed. Home equity loans, personal loans, or specialized ADU loans can be viable options.

5. **Stay Informed**: Keep abreast of any changes in local and state regulations that might impact your project.

### Helpful Tips

- **Design Flexibility**: Consider modular or prefab ADUs as a cost-effective option that can reduce construction time.
- **Community Input**: Engage with your neighbors early in the process to mitigate any potential concerns about your project.
- **Sustainability**: Incorporate sustainable design elements that could make your ADUs more attractive to future tenants or buyers.

By following these steps and leveraging the resources available in San Diego, you’re well on your way to successfully adding multiple ADUs to your property. Best of luck with your project, and feel free to reach out if you have more questions or need further assistance!

Warm regards,

[Your Name]
ADU Consultant