Attached ADU in California

ADU Hotline offers affordable ADU design and permitting in Southern California. From granny flats to garage conversions, they handle the full process in 3–4 weeks, helping homeowners add rental income or family housing efficiently.

Hernandez Family Construction serves Fresno & Madera, CA, offering custom homes, ADUs, granny flats, multifamily builds & spec homes. Founded by Michael Hernandez, they also provide construction financing guidance including one-time close loans.

Buildoly is an ADU contractor offering full-service construction for detached ADUs, garage conversions, granny flats, JADUs, and backyard cottages. They manage design, permitting, and building, helping homeowners add rental income or family housing.

Dagan Design & Construction (DDC), founded in 2012 in Encinitas, CA, offers custom home design, luxury renovations, interior design, and general contracting across Southern California and nationwide.

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.

Home 360 Construction Inc. offers full-service ADU construction in San Diego, including detached, attached, and garage conversion units. They manage planning, permits, design, and inspections across San Diego County neighborhoods.

Saunders Construction Renovation Inc offers ADU construction in Torrance, Redondo Beach & Palos Verdes Peninsula. Services include detached ADUs, garage conversions & granny flats. BBB A+ rated South Bay contractor.

Progressive Builders LA offers full-service ADU construction in Los Angeles, handling detached ADUs, garage conversions, granny flats & in-law suites. Custom design, quality materials, on-time delivery & accessible pricing for all project sizes.

Realty Builders Inc. is a licensed ADU contractor specializing in custom accessory dwelling units, including in-law suites, granny flats, garage conversions & rental units, offering streamlined permitting & guaranteed workmanship.

Built Environment Inc. is a licensed Northern California ADU contractor with 20+ years of experience. They build detached, attached, internal, JADU, and garage conversion ADUs, guiding homeowners from consultation to completion per California building codes.

Homestead ADU offers turnkey accessory dwelling units for California homeowners. Models range from 451 to 1,200 sq ft. Offsite modular construction cuts costs by 30% and delivers units in 6–7 months. Serving Shasta & San Luis Obispo County.

A1 ADU Contractor specializes in garage conversions and custom ADU construction throughout Los Angeles and the San Fernando Valley. With over 15 years of experience, our team provides complete design, permitting, and construction services to transform underutilized spaces into beautiful, functional living areas. Whether you're creating a rental unit, guest house, home office, or multi-family dwelling, we deliver high-quality craftsmanship and personalized solutions tailored to your needs.