Detached ADU near Downey, CA

Gather ADU is a Los Angeles-based ADU specialist with 10+ years of experience and 127+ completed projects. Services include feasibility analysis, permits, financing, and construction for detached ADUs, garage conversions, attached ADUs, and JADUs across LA County.

Foothill Renovators offers home remodeling, ADU construction, new builds, and additions. Services include flooring, roofing, electrical, plumbing, and more. They handle permits and full project management for detached ADUs, granny flats, and garage conversions.

Garage conversion to ADU in Los Angeles requires structural upgrades, permits, and utility connections. IBA Builders evaluates ceiling height, slab condition, setbacks, and utility access before design begins, ensuring code compliance and accurate project scoping.

Vertebrae is an LA-based, woman-owned architecture studio founded in 2012, specializing in ADU design and small-space living. Award-winning projects include the 2025 Architizer A+ Award and 2023 AIA LA Honor Award winners.

California ADU Experts simplify the complexities of ADU development with a full-service approach encompassing everything from design and architecture to permitting and construction.

Their goal is to provide a streamlined experience tailored to your specific requirements. They're committed to turning your vision into reality and ensuring you enjoy the journey while achieving outstanding results.

Productive Home Renovation Inc offers full-service room additions, including porches, upper stories & interior expansions. They handle permits, planning & construction, ensuring code compliance & durable results tailored to each homeowner's needs.

Baumeister Construction offers full-service ADU construction in Carson, CA, including garage conversions, JADUs & detached units. 20+ years experience, woman-led, covering design, permitting & sustainable builds.

An ADU (accessory dwelling unit) is a secondary home on a residential lot. Garage conversion ADUs are cost-effective, blending with existing homes. YOR Construction & Investments specializes in Los Angeles ADU garage conversions.

Tims New Construction is a Los Angeles contractor specializing in ADU, Junior ADU, and garage conversions. Services include custom design, permitting, and full builds. They also support SB9 projects, helping homeowners add rental units or family housing.

California's 2020 ADU laws allow two ADUs on single-family lots, reduced setbacks, larger units up to 800 sq ft, no owner-occupancy rules until 2025, faster approvals, and expanded parking exemptions statewide.

Delcoi is an ADU contractor specializing in granny flats, casitas, in-law suites, detached ADUs, garage conversions, and backyard cottages. They handle permits, regulatory compliance, and quality construction to maximize living space and rental income potential.

Smart ADU Builder offers customizable ADU floor plans from 400–1,200 sq ft, including granny flats, in-law suites & backyard cottages. Choose from 20+ pre-approved plans or custom designs with smart home features & energy-efficient systems.

Lion Builder Construction is a Southern California contractor serving Orange, LA, and Riverside Counties, plus Maricopa County, AZ. They specialize in new homes, ADUs, and kitchen remodels, offering a one-stop-shop approach.

ADUs are secondary units built on existing lots. ORR Construction builds detached ADUs, garage conversions, JADUs & in-law suites in California. Costs range $50–$300/sq ft. California laws like SB 897 simplify the permitting process.