Can I have multiple ADUs on one lot in Santa Clarita?

Sarah Thomas
October 22, 2025 at 07:15 AM
Zoning & Legal Santa Clarita, CA
Hi everyone,

I'm looking for some guidance regarding the possibility of adding multiple ADUs to my property in Santa Clarita. I've been doing some research on ADUs and the city's zoning laws, but I'm still uncertain about a few things and would really appreciate any insights you might have.

I own a 10,000 square foot lot in a residential area, and my goal is to maximize the use of the space by potentially adding more than one ADU. My budget is relatively tight, so I'm trying to ensure that I understand all the legalities and requirements before proceeding.

From what I've gathered, California state laws seem to support the idea of having more than one ADU on a single lot, but I'm not entirely sure how local regulations might affect this. Has anyone successfully added multiple ADUs in Santa Clarita, and if so, what challenges did you face?

I'm also curious about the specific zoning requirements I need to meet. Are there particular lot size requirements or limitations on the number of ADUs per lot in our city? Additionally, how do parking requirements change when adding multiple units?

Lastly, I’d like to know if there are any incentives or programs in Santa Clarita that might help offset costs or provide guidance during the process. Any advice or experiences would be greatly appreciated, especially from those who've been through the process already. Thanks in advance!

1 Answer

Nick
October 20, 2025 at 01:05 PM
Hello!

You're on the right track exploring the possibility of adding multiple ADUs to your 10,000 square foot lot in Santa Clarita. Understanding both state and local regulations is crucial to navigating this process successfully. Below, I'll break down the key aspects you need to consider, based on California state law and Santa Clarita's specific ordinances.

### 1. California State Laws and Local Ordinances

**California State Law:** Under recent state legislation, including SB-9 and AB-68, homeowners in California can add up to two ADUs on their property—a detached ADU and a Junior ADU (JADU). A JADU is a smaller unit, typically part of the existing structure, with a separate entrance and basic cooking facilities.

**Santa Clarita Specifics:** While state laws provide a framework, local jurisdictions can implement regulations that modify these allowances. In Santa Clarita, zoning and lot size are crucial factors. Generally, if your property is zoned for single-family residential use, you can add one detached ADU and one JADU. Given your sizeable lot, this should be feasible, but check with the Santa Clarita Planning Division for any recent updates or specific neighborhood conditions.

### 2. Zoning Requirements

**Zoning and Lot Size:** Santa Clarita's zoning regulations may have specific stipulations on the minimum lot size and the setbacks required for ADUs. For a 10,000 square foot lot, you typically meet the size requirements for multiple units, but verify exact zoning classifications (such as R-1 or R-2) with the city's zoning map.

**Parking Requirements:** Generally, state law has reduced parking requirements for ADUs, especially if your lot is within half a mile of public transit. However, adding multiple units may still necessitate some additional parking solutions. Santa Clarita may require one parking space per unit unless exceptions apply.

### 3. Costs and Timelines

**Cost Estimates:** The cost of constructing an ADU in Santa Clarita can range from $150,000 to $350,000 depending on size, design, and materials. JADUs, being smaller and part of the existing home, can be on the lower end, around $50,000 to $100,000. Keep in mind that site-specific factors like utility connections, grading, or access can affect these costs.

**Timelines:** From planning to completion, expect the process to take 12-18 months. This includes design, permitting, and construction phases. The permitting process alone can take 3-6 months, so starting early is advisable.

### 4. Incentives and Programs

While Santa Clarita may not have specific ADU incentives, California offers potential resources:

- **CalHFA ADU Grant Program:** This state-wide program offers grants up to $40,000 for ADU development, which can help offset design and permitting costs.
- **Energy Efficiency Rebates:** Consider programs for energy-efficient construction or appliances, which can reduce long-term operating costs.

### 5. Practical Steps and Considerations

**Step-by-Step Guidance:**

1. **Research Local Regulations:** Confirm your zoning and any local modifications to state laws with the Santa Clarita Planning Division.

2. **Consult Professionals:** Hire an architect or a design-build firm familiar with ADUs in Santa Clarita. They can help navigate zoning laws and design standards.

3. **Budget Planning:** Secure financing and develop a detailed budget. Include contingencies for unexpected expenses.

4. **Permit Application:** Submit detailed plans to the city's Building and Safety Division. Ensure all designs comply with local codes and ordinances.

5. **Construction:** Once permits are approved, begin construction. Choose contractors with ADU experience to streamline the process.

**Common Pitfalls:** Avoid starting construction without final permits, as this can lead to costly fines or delays. Ensure all contractors are licensed and insured.

### 6. Next Steps and Resources

- **Contact Santa Clarita City Planning Division:** They can provide specific insights into zoning and permit requirements.
- **Review SB-9 and AB-68:** Understand your rights under state law and how they interact with local regulations.
- **Join Local ADU Forums:** Engage with others in the community who are also pursuing ADU projects.

By following these guidelines and leveraging available resources, you can effectively maximize your property's potential with multiple ADUs. Good luck with your project in Santa Clarita!

Best regards,
[Your Name]
ADU Consultant
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Types of ADUs in Santa Clarita, CA

Understanding the different types of Accessory Dwelling Units can help you choose the best option for your property and needs.

Detached ADU

A separate, standalone structure built on your property. Offers maximum privacy and flexibility for tenants.

  • Complete privacy
  • Custom design options
  • Higher rental income potential
Attached ADU

An addition to your existing home with a separate entrance. Cost-effective option with shared utilities.

  • Lower construction costs
  • Shared utility connections
  • Family-friendly proximity
Garage Conversion

Convert existing garage space into a livable unit. Most cost-effective ADU option with fastest approval.

  • Lowest construction cost
  • Faster permitting
  • Uses existing structure
JADU

Junior ADU created within the existing home. Maximum 500 sq ft with efficiency kitchen and shared utilities.

  • Minimal construction
  • No parking requirement
  • Perfect for family use
Upper Floor ADU

Add a second story or convert existing upper floor space. Maximizes property value and rental potential.

  • Premium rental rates
  • Enhanced privacy
  • Great city views
Basement ADU

Convert basement or lower level into living space. Great option for properties with existing below-grade areas.

  • Uses existing space
  • Natural temperature control
  • Sound isolation

ADU Cost Guide for Santa Clarita, CA

Understanding ADU costs helps you budget effectively and make informed decisions about your project. Costs vary based on size, complexity, and local factors.

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
Attached ADU 600-1,000 sq ft $120K - $200K 4-8 months Shared utilities, family proximity
Detached ADU 600-1,200 sq ft $150K - $300K 6-12 months Maximum rental income
Two-Story ADU 800-1,500 sq ft $200K - $400K 8-15 months Maximizing property value
Cost Factors to Consider
  • Site Preparation: $5K - $25K
  • Permits & Fees: $3K - $15K
  • Utility Connections: $5K - $20K
  • Finish Level: $10K - $50K variance
  • Landscaping: $2K - $10K
Potential ROI
  • Rental Income: $1,500 - $4,000/month
  • Property Value Increase: 20-30%
  • Payback Period: 8-15 years
  • Tax Benefits: Depreciation allowances
  • Equity Growth: Long-term appreciation
Get Your Personalized Cost Estimate

These are general ranges. Your actual costs may vary based on specific site conditions, design choices, and local market factors in Santa Clarita.

Get Detailed Quote

Why Build an ADU in Santa Clarita?

Financial Benefits
Rental Income: Generate $18,000-$48,000 annually
Property Value: Increase home value by 20-30%
Tax Benefits: Depreciation and expense deductions
Investment: Strong ROI in California markets
Lifestyle Benefits
Multigenerational Living: Keep family close while maintaining privacy
Home Office: Create dedicated workspace or studio
Guest Space: Comfortable accommodations for visitors
Sustainability: Increase housing density efficiently

Popular ADU Floor Plans

Explore our most popular ADU designs that work well in Santa Clarita, CA. These professionally designed floor plans optimize space and functionality while meeting local building requirements.

Cascade ADU Floor Plan - 2 Bedroom, 2 Bathroom
2 Bed 2 Bath 1,200 sq ft
The Cascade

Spacious 2-bedroom design perfect for families. Features open living area, full kitchen, and two full bathrooms with optimal privacy.

Open floor plan
Master suite
Laundry room
Summit ADU Floor Plan - 2 Bedroom, 2 Bathroom
2 Bed 2 Bath 950 sq ft
The Summit

Efficient 2-bedroom layout maximizing every square foot. Great for narrow lots with smart storage solutions throughout.

Compact design
Pantry storage
Two full baths
Brookside ADU Floor Plan - 2 Bedroom, 2 Bathroom
2 Bed 2 Bath 1,400 sq ft
The Brookside

Luxurious 2-bedroom design with premium features. Includes master suite, guest bedroom, and spacious living areas.

Large living room
Walk-in closets
Full kitchen island
Sequoia ADU Floor Plan - 3 Bedroom, 2 Bathroom
3 Bed 2 Bath 1,100 sq ft
The Sequoia

Unique 3-bedroom configuration perfect for larger families. Features dual bathrooms and smart space utilization.

Three bedrooms
Laundry room
Multiple closets
Crestline ADU Floor Plan - 3 Bedroom, 2 Bathroom
3 Bed 2 Bath 1,500 sq ft
The Crestline

Premium 3-bedroom layout with maximum comfort. Features spacious bedrooms, walk-in closets, and luxury finishes.

Primary suite
Pantry space
Open concept
Ready to Explore More ADU Designs?

Browse our complete collection of ADU floor plans with detailed specifications, 3D renderings, and customization options.

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Types of ADUs in Santa Clarita, CA

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

Detached ADU

A standalone structure separate from the main house. Offers maximum privacy and flexibility.

  • Maximum privacy
  • Flexible design options
  • Higher rental income potential
Garage Conversion

Converting an existing garage into a living space. Most cost-effective option.

  • Lower construction costs
  • Faster permitting process
  • Existing utilities nearby
Attached ADU

An addition to the existing house with separate entrance. Balances cost and privacy.

  • Shared utilities
  • Moderate construction costs
  • Easy maintenance access
Ready to Start Your ADU Project?

Get a personalized quote and expert guidance for your Santa Clarita ADU project.

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ADU Cost Guide for Santa Clarita, CA

Understanding ADU costs helps you budget effectively and make informed decisions about your project in Santa Clarita, CA.

ADU Type Size Range Cost Range Cost per Sq Ft Timeline
Garage Conversion 400-800 sq ft $80,000 - $150,000 $200 - $250 3-6 months
Attached ADU 500-1,200 sq ft $150,000 - $300,000 $250 - $350 6-9 months
Detached ADU 600-1,200 sq ft $200,000 - $400,000 $300 - $450 8-12 months
Prefab ADU 400-1,000 sq ft $120,000 - $250,000 $250 - $350 4-8 months
JADU (Junior ADU) Up to 500 sq ft $50,000 - $120,000 $150 - $300 2-4 months
Cost Factors to Consider:
  • Site preparation and utilities
  • Permits and plan review fees
  • Foundation and structural work
  • Finishes and appliances
  • Landscaping and driveway
Ways to Save Money:
  • Choose garage conversion over new build
  • Use prefab or modular construction
  • Keep design simple and efficient
  • Bundle with main house renovations
  • Work with experienced ADU builders
Get Your Personalized ADU Cost Estimate

Our experts will provide a detailed cost breakdown for your specific Santa Clarita property.

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Complete Guide to Zoning & Legal ADUs in Santa Clarita, CA

Understanding Zoning & Legal for ADU Projects

Navigating zoning regulations and legal requirements is crucial for any ADU project in Santa Clarita, CA. Understanding local ordinances, state laws, and compliance requirements can save you time, money, and potential legal issues down the road.

Key considerations for zoning and legal compliance include setback requirements, height restrictions, lot coverage limitations, and parking regulations. Each jurisdiction has specific rules that must be followed, and these can vary significantly even within the same county or region.

Working with experienced professionals who understand local regulations is essential. The GatherADU team specializes in navigating these complex requirements and can help ensure your project meets all necessary legal standards from planning through completion.

Zoning & Legal Requirements in Santa Clarita, CA

Local regulations in Santa Clarita, CA have specific requirements that affect ADU development. Understanding these local nuances is crucial for project success and compliance.

Santa Clarita has 22 ADU-related questions in our database, indicating active development interest in your area. This local activity suggests growing expertise among contractors, architects, and city officials familiar with ADU projects.

Common considerations for Santa Clarita include local architectural standards, historical district requirements if applicable, utility connection procedures, and neighborhood-specific zoning overlays that may affect your project.

Expert Insights on Zoning & Legal

The GatherADU team has helped hundreds of homeowners navigate zoning & legal challenges successfully. Our experience reveals common patterns, effective strategies, and potential pitfalls to avoid.

Professional consultation early in your project can prevent costly mistakes and delays. We've seen how proper planning in the zoning & legal phase saves both time and money throughout the entire ADU development process.

Our database contains 148 questions related to Zoning & Legal, with 157 expert answers providing comprehensive guidance for homeowners facing similar challenges.

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ADU Development Checklist for Santa Clarita, CA

Use this comprehensive checklist to ensure you don't miss important steps in your ADU development process.

Planning Phase
  • Define project goals and budget
  • Research local zoning requirements
  • Evaluate site conditions and constraints
  • Consult with ADU experts
  • Develop preliminary design concepts
Pre-Construction
  • Finalize architectural plans
  • Submit permit applications
  • Select qualified contractors
  • Secure financing if needed
  • Schedule utility connections
Construction Phase
  • Site preparation and excavation
  • Foundation and framing work
  • Rough-in electrical and plumbing
  • Insulation and drywall installation
  • Interior and exterior finishes
Completion
  • Final inspections and approvals
  • Certificate of occupancy
  • Utility meter installation
  • Final walkthrough and cleanup
  • Property insurance updates
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Related Topics
Zoning & Legal Santa Clarita ADU Planning Permits
Santa Clarita, CA

This question is specific to Santa Clarita, CA

Local regulations may vary by jurisdiction. Always verify with your local planning department.