Transform Your Property with Los Angeles Premier ADU Contractors
Award-winning ADU contractors in Los Angeles specializing in custom accessory dwelling units, garage conversions, and backyard homes. From design to completion, we create ADUs that expand your living space, increase home value, and generate rental income.
+ Years of
Experience
+Completed
Projects
Build Your Dream ADU with Silver Hammer Builders Experts
At Silver Hammer Builders, we specialize in designing and building Accessory Dwelling Units (ADUs) that add space, functionality, and value to your property. For over 15 years, we’ve helped Los Angeles homeowners create modern backyard homes, in-law suites, rental units, and guest houses — all tailored to their needs.
From the first design consultation to the final inspection, our licensed team delivers craftsmanship, transparency, and efficiency, ensuring your ADU project is completed on time and built to last.
ADU Services
in Los Angeles
ADU 3D Design
Visualize your ADU before construction with detailed 3D designs that showcase layout, style, and functionality. We help you see the entire space clearly, ensuring comfort, efficiency, and a design that fits your needs.
Garage Conversions
Turn your unused garage into a fully functional living unit. We handle structural upgrades, plumbing, insulation, and finishes for a seamless conversion.
Detached & Backyard ADUs
Expand your property with a detached ADU that blends beautifully with your existing home and landscaping. Perfect for long-term rentals or private guesthouses.
Junior ADUs
Compact and cost-efficient solutions for smaller properties. Junior ADUs (JADUs) maximize existing space with smart layouts and modern design.
Full-Service Construction
From foundation to finishes, we deliver end-to-end ADU construction with quality craftsmanship, premium materials, and transparent pricing.
How Much Does an ADU Cost in Los Angeles?
An Accessory Dwelling Unit (ADU) in Los Angeles costs $120,000–$400,000+ depending on size, type (attached, detached, or garage conversion), site conditions, and finish level. Most 500–800 sq ft detached ADUs built by Silver Hammer Builders range from $180,000–$280,000 including design, permits, foundation, utilities, and full interior finishes. These figures reflect current Q3 2026 pricing.
Garage Conversion: $80,000–$150,000
Convert an existing attached or detached garage into a studio or 1-bedroom ADU. Includes new foundation slab (if needed), insulation, drywall, electrical subpanel, mini-split HVAC, kitchenette, full bathroom, and separate entrance. Most cost-effective ADU type since the shell structure already exists. Typical timeline: 3–5 months.
Detached New Construction (500–800 sq ft): $180,000–$280,000
Ground-up construction of a standalone ADU with 1–2 bedrooms, full kitchen, full bathroom, and laundry. Includes foundation, framing, roofing, stucco or siding exterior, drywall, mid-range finishes, separate utility connections, and a small yard or patio. Typical timeline: 5–8 months including LADBS permitting.
Premium Custom ADU (800–1,200+ sq ft): $280,000–$400,000+
Larger custom ADU with 2+ bedrooms, gourmet kitchen, luxury bathroom, vaulted ceilings, hardwood floors, designer fixtures, separate HVAC, and premium exterior finishes matching the main house. Includes landscaping, private entrance gate, and smart-home features. Typical timeline: 8–14 months.
Cost Per Square Foot: $250–$550+/sq ft
Garage conversions run $180–$300/sq ft. Detached new-construction ADUs average $300–$450/sq ft. High-end custom ADUs with premium finishes range from $400–$550+/sq ft. Site challenges (sloped lot, poor soil, utility distance) can add $30,000–$60,000+ in site work and foundation upgrades.
Benefits of Remodeling with Silver Hammer Builders
- Free Design Consultation & Detailed Estimate
- Licensed & Insured Contractors with 10+ Years Experience
- Clear Pricing & Timelines — No Hidden Fees
- Flexible Financing Options to Fit Your Budget
- Dedicated Support from Start to Finish
- Trusted by 1000+ Los Angeles Homeowners
ADUs Client Reviews
Frequently Asked Questions
ADU
Los Angeles
From initial design to final inspection, an ADU in Los Angeles typically takes 6–14 months. The LADBS plan check and permit phase alone takes 3–6 months due to the volume of applications. Garage conversions are fastest at 3–5 months of construction since the shell structure already exists. A new detached ADU (500–800 sq ft) takes 5–8 months of construction after permits are issued. We provide a detailed Gantt-chart timeline during your consultation so you can plan around the construction schedule.
ADUs require LADBS building permits including plan check for structural, electrical, plumbing, and mechanical systems. You may also need LADBS Planning approval, LADWP utility clearance, and Fire Department review depending on your property. SB 9 and state ADU laws (AB 68/AB 881) have streamlined many requirements. Silver Hammer Builders manages the entire entitlement and permitting process — we prepare all plans, submit to LADBS, attend plan check meetings, and coordinate with all reviewing agencies.
Most single-family lots in Los Angeles qualify for at least one ADU under California state law. Key requirements include: adequate lot size (typically 3,000+ sq ft, though smaller lots may qualify), setbacks of 4 feet from rear and side property lines, maximum height of 16–25 feet depending on zone, and at least one parking space (waived if within half-mile of transit). We provide a free on-site feasibility assessment during your initial consultation, including a zoning check, site measurement, and preliminary budget estimate.
Yes — a well-built ADU in Los Angeles typically adds $200,000–$400,000+ to your property value while generating $1,500–$3,000+/month in rental income at current market rates. ADUs are one of the highest-ROI investments for LA homeowners due to the persistent housing shortage and state laws that have dramatically reduced barriers to construction. They also provide flexible space for multi-generational living, home offices, or guest accommodations. We can provide comparable property value analysis for your neighborhood during consultation.
