Detached ADU — Northridge, CA
880 sq ft two-bedroom detached ADU with full kitchen, one bathroom, in-unit laundry, and private entrance. Mini-split HVAC, tankless water heater, and separate 125A sub-panel. Duration: 6 months from permit issue.
Our Services
ADU Construction in Los Angeles
A Smarter Way to Build ADUs in Los Angeles. Custom accessory dwelling units to maximize your property value.
ADU Construction
We provide ADU design and construction services across Los Angeles and select nearby communities, including the San Fernando Valley, Pasadena, Calabasas, Santa Clarita, and surrounding areas.
ADU Construction
ADU construction in Los Angeles has become significantly more accessible due to updated California housing laws. Reduced setback requirements, relaxed parking rules, and a streamlined permitting process have made it easier for homeowners to add legal living space on existing properties.
Green Star Remodeling designs, permits, and builds ADUs across Los Angeles and the San Fernando Valley. As a licensed general contractor, we manage the entire process — from site feasibility and architectural design through LADBS permitting and full construction — under one coordinated system without the complexity of managing multiple separate teams.
What We Offer
- ✓ Detached ADU construction
- ✓ Garage conversions
- ✓ Junior ADU (JADU) builds
- ✓ Permit navigation & filing
- ✓ Custom floor plans & design
- ✓ Full utility connections
- ✓ Interior finishing & fixtures
- ✓ Landscaping integration
Los Angeles ADU Construction Services
Detached New-Build ADUs
Fully independent structure with its own foundation, utilities, kitchen, and bathroom. Highest flexibility for rental income and property value. Typically up to 1,200 sq ft in Los Angeles depending on lot size.
Attached ADUs
Connected to the main home with a separate entrance and full living setup. Ideal for maximizing space when detached construction is not practical.
Garage Conversion ADUs
Existing garage converted into a legal living unit. One of the most cost-efficient ADU options in Los Angeles. Parking replacement is generally not required under California ADU laws.
Junior ADUs
Compact units built within the existing home, up to 500 sq ft. Simplified permitting process designed for flexible living or rental use within the primary residence.
Permit Navigation
LADBS submittal, planning review, zoning confirmation, and utility coordination — all handled end-to-end.
Custom Design
Floor plans tailored to your lot, access, and rental or family-use goals — including energy modeling and Title 24 compliance.
Full Utility Connections
Separate electrical sub-panels, gas, water, and sewer connections, with smart metering options for rental separation.
Interior Finishing
Kitchens, bathrooms, flooring, and millwork finished at the same standard as our primary-home remodels.
Why Build an ADU in Los Angeles?
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Serious Rental Income
Los Angeles has strong rental demand, especially in the San Fernando Valley. A well-designed ADU can generate consistent monthly rental income depending on size, layout, and location, making it a long-term income asset.
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Multi-Generational Living
An ADU provides a private, independent living space for family members such as parents or adult children, offering proximity while maintaining privacy and separation.
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Property Value
A properly built ADU adds significant long-term value by increasing usable living space and rental potential, which is often reflected in overall property valuation in Los Angeles markets.
Transform Your Home Today
Get a free, no-obligation estimate within 24 hours. Call us or fill out the form — let's build something extraordinary.
ADU Cost in Los Angeles
Project Type Typical Cost Range
Garage conversion (400–500 sq ft) $120,000 – $200,000
Junior ADU (JADU, under 500 sq ft) $100,000 – $175,000
Detached ADU — small (500–700 sq ft) $250,000 – $400,000
Detached ADU — medium (700–1,000 sq ft) $350,000 – $550,000
Detached ADU — large (1,000–1,200 sq ft) $450,000 – $700,000+
Materials & Systems We Work With
Exteriors
Stucco, fiber cement siding (HardiePlank), board-and-batten, and wood siding paired with Milgard, Marvin, and Andersen windows for durability and energy performance.
Kitchens & Baths
Custom cabinetry, quartz countertops, tile shower systems, and durable fixtures designed to match either rental-focused or family-use ADU layouts.
Mechanical Systems
Mini-split HVAC systems, tankless water heaters, dedicated electrical sub-panels (100–125A), and smart metering options for separate utility usage.
Energy Efficiency
Title 24–compliant insulation, high-performance windows, LED lighting systems, and solar-ready conduit installations for future expansion.
Featured ADU Projects — Los Angeles
Garage Conversion — Encino, CA
440 sq ft garage converted to a one-bedroom ADU with new windows, insulation, mini-split, kitchenette, full bathroom, and private side entry. Duration: 3.5 months.
Our Process
01
Free In-Home Consultation
We visit your home, assess the space, discuss your goals, and provide a detailed written estimate — free and with no obligation.
02
Design & Material Selection
Our team creates a complete design plan — layout, finishes, fixtures, cabinetry, lighting — so you see the finished space before construction begins.
03
Permits & Pre-Construction
We handle all permits with LADBS. Materials are ordered, the schedule is locked, and your project is fully planned before demo day.
04
Construction & Installation
Controlled demolition, waterproofing, plumbing, finishes, fixtures — every phase executed with precision by our licensed crew.
05
Final Walkthrough & Handover
Complete inspection, punch list, final adjustments. Your project isn't done until you say it's done.
Why Choose Green Star Remodeling?
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Licensed, Bonded & Insured
California Contractor's License #1088206. Every project is legally protected and code-compliant.
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One Team, One Point of Contact
Your dedicated project manager oversees every trade — so nothing falls through the cracks.
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5.0★ Google Rating — 54 Reviews
Our reputation is built one project at a time. Consistent quality, clear communication, on-time delivery.
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Quality Over Volume
We limit our active projects so every job receives the craftsmanship and attention it deserves.
Serving Los Angeles Communities
● Encino ● Tarzana ● Sherman Oaks ● Studio City ● Woodland Hills ● Calabasas
FAQ
FAQ
How much does an ADU cost in Los Angeles? ▾
ADU construction costs in Los Angeles vary based on unit type, size, site conditions, structural requirements, and finish level. Garage conversions are typically the most efficient option, while detached ADUs require more extensive design, permitting, and construction work. Final cost is determined by scope, materials, and LADBS permitting requirements. We provide a free site evaluation and detailed written estimate based on your property conditions, design goals, and intended use.
How long does it take to build an ADU in Los Angeles? ▾
8–14 months total for a detached ADU (including 3–5 months of permitting); 5–9 months for a garage conversion. The permitting phase — plan preparation, LADBS submission, plan check, corrections, permit issuance — is the most time-variable component.
What is the maximum size for an ADU in Los Angeles? ▾
Detached ADUs: up to 1,200 sq ft for most single-family properties. JADUs: limited to 500 sq ft within the existing structure. Your specific property's allowances depend on lot size and zoning confirmed during the free site evaluation.
Can I build an ADU if I have a small lot? ▾
In most cases, yes. California law restricts local agencies from imposing setback requirements greater than 4 feet side and rear for detached ADUs, specifically to make ADU construction feasible on smaller urban lots. Many LA lots previously considered too small for an ADU can now accommodate one.
Do I need an architect for an ADU? ▾
Yes, architectural plans are required for permit applications. Green Star Remodeling includes architectural design services in our ADU project scope. You do not need to hire an architect separately — our service covers this.
Ready for Your Dream Remodel?
Free in-home estimate within 24 hours. No obligation.