How much does an SB-9 lot split cost in Fremont?

Barbara Garcia

October 19, 2025 at 10:20 PM

SB-9 (Lot Splits) Fremont, CA

Hi everyone,

I'm considering taking advantage of SB-9 to do a lot split on my property in Fremont, CA, and I’ve been trying to gather all the relevant information. My lot is about 10,000 square feet, and I think it's a good candidate for this. I'm working with a tight budget, though, and I’m trying to get a clearer picture of the costs involved in such a project.

From what I've read, I understand there are several fees involved, such as survey costs, application fees, and possibly infrastructure improvements. Can anyone provide a rough estimate of what the total cost might be for a lot split in Fremont?

Additionally, I'm curious about the timeline. How long does the process usually take from application to final approval? I’ve seen some estimates online, but I’d love to hear from someone with firsthand experience.

I’m also concerned about any specific zoning regulations in Fremont that I should be wary of. Are there any particular constraints or requirements that I might not be aware of?

Lastly, are there common pitfalls or hidden costs that could catch me by surprise? I'm hoping to avoid any major setbacks, so any advice would be greatly appreciated.

Thanks in advance for any insights you can share!

1 Answer

Michael Park

October 18, 2025 at 03:32 PM

Hello,

Navigating the intricacies of SB-9 lot splits in Fremont can be quite the endeavor, but with a bit of guidance, you can manage it effectively. Let’s break down your questions into more manageable parts.

### Costs Involved

When considering an SB-9 lot split in Fremont, there are several costs you should prepare for:

1. **Survey and Mapping Costs**: Hiring a licensed surveyor is essential to create a detailed site plan. This can range from $5,000 to $10,000, depending on the complexity of your lot.

2. **City Application Fees**: Fremont’s Planning Division charges fees for processing SB-9 applications. This includes preliminary reviews and final approvals, typically ranging from $3,000 to $5,000.

3. **Utility Connection Fees**: These can vary greatly depending on existing infrastructure. Be prepared for costs ranging from $5,000 to $15,000, especially if new lines or upgrades are needed.

4. **Infrastructure Improvements**: You may need to upgrade sidewalks, curbs, or streets, especially if your lot is on a corner or in a developing area. This can add another $10,000 to $30,000.

5. **Legal and Miscellaneous Costs**: Consulting with a real estate attorney to ensure compliance with local and state regulations may cost $1,500 to $3,000. Additionally, reserve a contingency fund for unexpected expenses, ideally 10-15% of your total budget.

### Timeline

The timeline for an SB-9 lot split in Fremont typically ranges from six months to over a year. Here’s a rough breakdown:

- **Pre-application Research and Preparation**: 1-2 months
- **Application Submission and Initial Review**: 2-3 months
- **Additional Reviews and Approvals**: 3-4 months
- **Final Approval and Recording**: 1-2 months

### Zoning and Local Considerations

Fremont, like many California cities, requires adherence to specific zoning laws. Under SB-9, your split lot must meet these criteria:

- **Minimum Lot Size**: Each resultant lot must be at least 1,200 square feet.
- **Owner Occupancy Requirement**: You must sign an affidavit stating you will live in one of the properties for at least three years post-split.
- **No Demolition Restrictions**: If the property has been rented in the last three years, there are restrictions on demolishing those units.

Fremont may also have additional guidelines, so it’s wise to check with the local planning department.

### Common Pitfalls and Hidden Costs

- **Environmental and Historical Review**: Some lots may require additional review, especially if they are near environmentally sensitive areas or historical sites.
- **Neighborhood Opposition**: Be prepared for potential pushback from neighbors, which can delay the process.
- **Infrastructure Surprises**: Unforeseen issues with existing utility lines or soil conditions can lead to additional costs and delays.

### Practical Advice

1. **Consult Local Experts**: Engage with local architects or land-use consultants who have experience with SB-9 projects in Fremont. They can offer insights specific to your neighborhood.

2. **Pre-Application Meetings**: Schedule a meeting with Fremont’s Planning Division to discuss your plans and gather insights on potential hurdles.

3. **Community Engagement**: Proactively communicate with your neighbors about your plans. Addressing concerns early can mitigate opposition.

4. **Budgeting for Contingencies**: Always have a financial buffer for unexpected complications. This can save you from stress and financial strain as the project progresses.

### Next Steps and Resources

- **Contact Fremont’s Planning Division**: Start by visiting their website or office to get the most recent forms and fee schedules.
- **Explore State Resources**: The California Department of Housing and Community Development offers guidance on SB-9 which can be a helpful resource.
- **Attend Local Workshops**: Fremont occasionally hosts workshops or informational sessions on SB-9 and ADU development. These can be invaluable for networking and learning.

By understanding the costs, timelines, and regulations, you’re setting yourself up for a successful lot split. Remember, thorough planning and community engagement are key to navigating this process smoothly. Good luck with your project, and feel free to reach out if you have more questions!

Best regards,

[Your Name]
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ADU Type	Size Range	Cost Range	Timeline	Best For
Garage Conversion	400-800 sq ft	$80K - $150K	3-6 months	Budget-conscious homeowners
JADU	Up to 500 sq ft	$50K - $100K	2-4 months	Family use, minimal disruption
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Site Preparation: $5K - $25K
Permits & Fees: $3K - $15K
Utility Connections: $5K - $20K
Finish Level: $10K - $50K variance
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Property Value Increase: 20-30%
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Types of ADUs in Fremont, CA

Understanding the different types of Accessory Dwelling Units available in Fremont, CA can help you choose the best option for your property and budget.