What are the height restrictions for ADUs in Torrance?

David Wilson
October 22, 2025 at 05:26 AM
Design & Planning Torrance, CA
I'm planning to build an Accessory Dwelling Unit (ADU) on my property in Torrance, California, and I'm trying to make sure I adhere to all local building codes and regulations. My lot is about 7,500 square feet, and I have a budget around $150,000. I've read through some of the city’s guidelines, but I'm still unclear about the height restrictions for ADUs here.

From what I gathered, the primary residence is a single-story home, and I'd ideally like to have a two-story ADU to maximize space while keeping the footprint small. However, I'm concerned about potential height limitations that might affect this plan. Can anyone clarify what the maximum height allowed for an ADU is in Torrance?

Additionally, how does the height restriction change if the ADU is attached to the main house versus being a detached unit? I also read something about setbacks affecting allowable height—how do those factor in? Lastly, are there any specific architectural design requirements or recommendations that I should be aware of to seamlessly blend the ADU with my existing home?

Any insights or experiences you all could share would be greatly appreciated! I want to ensure everything is up to code before I proceed with the design and planning stages. Thanks in advance!

1 Answer

Argi A
October 21, 2025 at 03:43 AM
Hello!

Congratulations on planning to build an Accessory Dwelling Unit (ADU) on your property in Torrance. It's a great way to add space and value to your home. Let’s dive into the details regarding height restrictions and other considerations to ensure your project aligns with local regulations and your vision.

### Height Restrictions

**Detached ADU:** In Torrance, the maximum height for a detached ADU typically ranges up to 16 feet, but there are exceptions if the design is compatible with existing zoning and building codes. Since you’re considering a two-story ADU, you might need to apply for additional considerations or variances if the structure exceeds local height limitations. Generally, a two-story ADU can reach up to 25 feet, depending on proximity to the property line and other structures, subject to approval.

**Attached ADU:** If your ADU is attached, the height may be allowed to match the primary dwelling unit, provided it does not exceed the maximum height restrictions of the zoning district. In many R-1 zones in Torrance, this is around 25-30 feet, but always verify with the city’s planning department as specific local variances can apply.

### Setbacks and Their Impact

Setbacks are critical when determining the potential height and placement of your ADU. For Torrance:

- **Rear Yard Setback:** Typically requires a minimum of 4 feet.
- **Side Yard Setback:** Also generally 4 feet from the property line.

The closer your ADU is to these setbacks, the more stringent the height regulations can become. It's crucial to ensure that your design does not encroach upon these setback requirements unless a variance is granted.

### Architectural Design Considerations

To blend your ADU seamlessly with your existing single-story home, consider the following design tips:

1. **Roof Design:** Match the roof pitch and materials of your existing home to create a cohesive look.
2. **Exterior Materials:** Use similar siding and paint colors to ensure the new structure complements the primary residence.
3. **Windows and Doors:** Align these features with your home’s existing style to keep the architectural integrity.

### Budgeting and Cost Considerations

With a budget of $150,000, planning is crucial. Here’s a rough breakdown for Torrance:

- **Design & Permits:** $10,000 - $15,000. This includes architectural design and securing necessary permits.
- **Construction Costs:** $120,000 - $135,000. This is the bulk of your budget, covering materials, labor, and any unforeseen expenses.
- **Utilities & Landscaping:** $10,000 - $15,000. Ensure utilities are adequately connected, and consider landscaping for aesthetics and privacy.

### Timeline

From design to completion, anticipate a timeline of 12 to 18 months. This includes:

1. **Design Phase:** 2-3 months.
2. **Permitting Phase:** 3-6 months, depending on city processing times and potential need for variances.
3. **Construction Phase:** 6-9 months.

### Regulatory Framework

Your project will fall under several California laws:

- **SB-9:** Facilitates the creation of additional units on residential properties, impacting density regulations.
- **AB-68:** Streamlines the ADU approval process, reducing local barriers to construction.

Ensure you’re in compliance by consulting the latest local ordinances or discussing with a local architect familiar with Torrance's specific regulations.

### Common Pitfalls and Tips

- **Overlooking Permits:** Ensure all necessary permits are secured before construction starts to avoid delays and fines.
- **Ignoring Utilities:** Plan for potential utility upgrades, especially if adding bathrooms or kitchens.
- **Underestimating Costs:** Always budget for a 10-15% contingency to cover unexpected costs.

### Next Steps

1. **Consult with a Local Architect:** This will ensure your design complies with local zoning and building codes.
2. **Visit the City Planning Department:** Direct communication can clarify any ambiguities in local codes.
3. **Hire a Professional Contractor:** Look for someone experienced with ADUs in Torrance to streamline the building process.

### Resources

- **City of Torrance Planning Division:** Visit their website or office for specific guidelines and forms.
- **Local ADU Contractors and Builders:** Engage with professionals who have successfully completed projects in your area for insights and recommendations.

Feel free to reach out if you have more questions or need specific recommendations. Best of luck with your ADU project!

Warm regards,

[Your Name]
ADU Consultant
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Types of ADUs in Torrance, 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 Torrance, 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 Torrance.

Get Detailed Quote

Why Build an ADU in Torrance?

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 Torrance, 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 Torrance, CA

Understanding the different types of Accessory Dwelling Units available in Torrance, 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 Torrance ADU project.

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ADU Cost Guide for Torrance, CA

Understanding ADU costs helps you budget effectively and make informed decisions about your project in Torrance, 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 Torrance property.

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Complete Guide to Design & Planning ADUs in Torrance, CA

Understanding Design & Planning for ADU Projects

Thoughtful design and planning are the foundation of any successful ADU project in Torrance, CA. From initial concept to final blueprints, every design decision impacts both functionality and compliance with local building codes.

Effective ADU design maximizes space efficiency while creating comfortable, livable environments. Consider factors like natural light, ventilation, storage solutions, and accessibility when developing your plans. The layout should serve your intended use, whether for rental income, family members, or home office space.

Professional design services can help you avoid costly mistakes and ensure your ADU meets both your needs and regulatory requirements. Our design experts understand local preferences and can create plans that add maximum value to your property.

Design & Planning Requirements in Torrance, CA

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

Torrance has 26 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 Torrance 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 Design & Planning

The GatherADU team has helped hundreds of homeowners navigate design & planning 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 design & planning phase saves both time and money throughout the entire ADU development process.

Our database contains 127 questions related to Design & Planning, with 139 expert answers providing comprehensive guidance for homeowners facing similar challenges.

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Don't let design & planning challenges delay your ADU dreams. Our experts can provide personalized guidance specific to your situation in Torrance, CA.

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ADU Development Checklist for Torrance, 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
Design & Planning Torrance ADU Planning Permits
Torrance, CA

This question is specific to Torrance, CA

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