Can I build an ADU myself in Glendale?

Maria Wilson

October 22, 2025 at 02:45 AM

Construction & Building Glendale, CA

Hello everyone,

I'm considering building an ADU on my property in Glendale, CA, and I'm hoping someone here can provide some insights or share experiences. I own a single-family home on a 7,500 sq ft lot, and we’re really excited about the possibility of adding an ADU for additional rental income or maybe even an office space. I've read through the city’s guidelines, but I'm still a bit confused about a few things and could use some expert advice.

First, is it feasible for someone like me, who has basic DIY skills but no formal construction experience, to manage this project myself? I do have a budget cap of around $100,000. Secondly, I understand there are specific regulations and permits required in Glendale—can anyone break down what's absolutely essential for compliance and what might be more flexible?

Additionally, I've heard that setbacks and parking might pose challenges. How strictly are these enforced, and are there any exceptions or ways around them? Lastly, what hidden costs should I be aware of that might not be obvious at first, such as utility hookups or environmental fees?

I’d really appreciate any guidance or personal stories from those who’ve been through this process. Thanks in advance!

1 Answer

Sarah Mitchell

October 21, 2025 at 10:50 AM

Hello,

Building an Accessory Dwelling Unit (ADU) in Glendale can be an exciting and rewarding project, whether for rental income or personal use. Let’s break down the key aspects you need to consider, especially if you're contemplating managing this project yourself.

### Feasibility of DIY Construction

While it’s possible for a homeowner with basic DIY skills to manage an ADU project, it’s essential to weigh your skill set against the complexities of construction and local regulations. DIY can save some costs, but it also requires a significant time investment and a steep learning curve. Here are considerations:

1. **Project Management**: You’ll need to coordinate with architects, contractors, electricians, and plumbers. If you’re comfortable with project management and have some construction knowledge, you may handle parts of the project, but hiring professionals for specialized tasks is advisable.

2. **Budget**: A budget cap of $100,000 is feasible, especially for a smaller, detached ADU or a garage conversion. However, costs can escalate quickly. A breakdown might include:
- **Design and Permits**: $5,000 to $15,000
- **Construction**: $80,000 to $90,000 depending on size and finishes
- **Utilities**: $5,000 to $10,000

3. **Time Commitment**: Expect 6-12 months from design to completion, with potential delays due to permitting or contractor availability.

### Regulations and Permits

Glendale has specific regulations under California’s state laws like SB-9 and AB-68, which encourage ADU development by easing certain restrictions. Key considerations include:

1. **Permits**: You’ll need building, electrical, plumbing, and potentially grading permits. Glendale’s Building & Safety Division is your go-to resource. Ensure you submit detailed plans for approval.

2. **Setbacks**: Typically, Glendale requires a minimum rear setback of 4 feet and side setbacks of 4 feet for ADUs. However, local variances may apply, so consulting with the planning department can provide clarity.

3. **Parking**: For new ADU constructions, if your property is within half a mile of public transit, parking requirements can be waived. Otherwise, one parking space per ADU is typically required but may be tandem parking or a driveway spot.

### Hidden Costs

1. **Utility Hookups**: Connection fees can be significant, especially if you need to upgrade water or electrical capacity. Budget $5,000 to $10,000 for these expenses.

2. **Environmental Fees**: Plan for potential environmental impact fees or assessments, particularly if your property is near a designated area requiring additional scrutiny.

3. **Insurance and Taxes**: Increased property value may raise property taxes, and additional insurance coverage for the new structure is advisable.

### Common Mistakes and Tips

- **Overlooking Site Conditions**: Assess your property for any drainage issues or easements that could complicate construction.
- **Ignoring Design Efficiency**: Work with an architect to maximize space efficiency and ensure compliance with local codes.
- **Underestimating Costs**: Always include a contingency fund (10-15% of your budget) for unexpected expenses.

### Next Steps

1. **Consult with Local Experts**: Engage with Glendale-based architects or ADU specialists who understand local nuances.
2. **Visit the Glendale Building & Safety Division**: Attend workshops or consultations to clarify any uncertainties about regulations or processes.
3. **Connect with Other Homeowners**: Forums and local community groups can provide valuable insights from others who have built ADUs in Glendale.

### Resources

- **City of Glendale Building & Safety Division**: [Website](https://www.glendaleca.gov/) for permits and regulations.
- **California Department of Housing and Community Development**: Provides guidelines on state laws affecting ADUs.
- **Local Contractors and Architects**: Seek referrals for professionals experienced in ADU projects in Glendale.

By carefully planning, managing your budget, and understanding local regulations, you can successfully navigate the ADU building process in Glendale. Good luck with your project, and feel free to reach out for more detailed advice as you proceed!

Best regards,

[Your Name]
ADU Consultant

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Types of ADUs in Glendale, 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 Glendale, 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 Glendale.

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Why Build an ADU in Glendale?

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 Glendale, 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

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

Compact design
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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
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Sequoia ADU Floor Plan - 3 Bedroom, 2 Bathroom

3 Bed 2 Bath 1,100 sq ft

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

Three bedrooms
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Crestline ADU Floor Plan - 3 Bedroom, 2 Bathroom

3 Bed 2 Bath 1,500 sq ft

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

Primary suite
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Types of ADUs in Glendale, CA

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