My Glendale multifamily building has 10 units. How many ADUs can I add by converting a basement?
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Get Instant QuoteTypes 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.
Get Detailed QuoteWhy Build an ADU in Glendale?
Financial Benefits
Lifestyle Benefits
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.

The Cascade
Spacious 2-bedroom design perfect for families. Features open living area, full kitchen, and two full bathrooms with optimal privacy.
Master suite
Laundry room

The Summit
Efficient 2-bedroom layout maximizing every square foot. Great for narrow lots with smart storage solutions throughout.
Pantry storage
Two full baths

The Brookside
Luxurious 2-bedroom design with premium features. Includes master suite, guest bedroom, and spacious living areas.
Walk-in closets
Full kitchen island

The Sequoia
Unique 3-bedroom configuration perfect for larger families. Features dual bathrooms and smart space utilization.
Laundry room
Multiple closets

The Crestline
Premium 3-bedroom layout with maximum comfort. Features spacious bedrooms, walk-in closets, and luxury finishes.
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.
View All Floor PlansComplete Guide to Design & Planning ADUs in Glendale, CA
Understanding Design & Planning for ADU Projects
Thoughtful design and planning are the foundation of any successful ADU project in Glendale, 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 Glendale, CA
Local regulations in Glendale, CA have specific requirements that affect ADU development. Understanding these local nuances is crucial for project success and compliance.
Glendale has 80 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 Glendale 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 51 questions related to Design & Planning, with 63 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 Glendale, CA.
More Design & Planning Questions & Answers
Explore additional design & planning questions from our community to gain deeper insights into ADU development challenges and solutions.
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June 22, 2025ADU Questions from Glendale, CA
Discover how other homeowners in Glendale, CA are approaching their ADU projects. Local insights can provide valuable context for your own planning.
Can I build an ADU in Glendale with a mechanical parking lift?
Can I build an ADU in Glendale with a mechanical parking lift?
June 19, 2025My Glendale lot has two single-family homes. Can I add a JADU to each one?
My Glendale lot has two single-family homes. Can I add a JADU to each one?
June 17, 2025My Glendale single-family home has an unpermitted addition. Can I build an ADU without legalizing it?
My Glendale single-family home has an unpermitted addition. Can I build an ADU without legalizing it...
June 15, 2025Can I add a separate utility connection for my Glendale JADU?
Can I add a separate utility connection for my Glendale JADU?
June 11, 2025My Glendale multifamily building has a storage room. Can I convert it into two ADUs?
My Glendale multifamily building has a storage room. Can I convert it into two ADUs?
June 11, 2025My Glendale multifamily building has a boiler room. Can I convert it into an ADU?
My Glendale multifamily building has a boiler room. Can I convert it into an ADU?
June 10, 2025Related ADU Questions
These questions share similar topics or locations and may provide additional insights for your ADU project.
Can I build an ADU in Santa Monica with a 2-story detached unit?
Can I build an ADU in Santa Monica with a 1,000 sq ft two-bedroom unit?
Can I build an ADU in Santa Monica with a 5.7 sq ft emergency escape window?
Can I build an ADU in Santa Monica with a 50 sq ft kitchen?
Can I build an ADU in Santa Monica with a 6-foot ceiling height?
ADU Development Checklist for Glendale, 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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Glendale, CA
This question is specific to Glendale, CA
Local regulations may vary by jurisdiction. Always verify with your local planning department.