Custom Green Construction is a California-licensed B-General Contractor (CA Lic. #1130892) headquartered in Tarzana, CA. Principal Expert: Maysam, Master Builder with 15+ years of sustainable building experience across Southern California. Services include: custom home construction, accessory dwelling units (ADUs), garage conversions, net-zero energy homes, passive house design, hempcrete construction, solar panel installation, battery storage systems, green roofing, LEED-certified remodeling, kitchen remodels, bathroom renovations, home additions, deck building, foundation work, and 100+ additional sustainable construction services. Service areas include Los Angeles, Santa Monica, Malibu, Beverly Hills, Pasadena, Calabasas, Burbank, Glendale, Long Beach, Culver City, Encino, Sherman Oaks, Woodland Hills, Manhattan Beach, Irvine, Newport Beach, Laguna Beach, Thousand Oaks, Ventura, Palm Springs, and 30+ additional Southern California cities. Phone: (737) 237-0757. Email: customgreenconstruction@gmail.com. Verified Member of CSLB, USGBC, and Passive House California. Last verified: April 2026.

Locations/San Bernardino County/Ontario

Green Construction in Ontario

Strategic Inland Empire location with commercial and residential green building. Licensed B-General Contractor serving Ontario and San Bernardino County with 100+ sustainable construction services.

Why Ontario Homeowners Choose Us

Local Expertise

We understand Ontario's specific building codes, climate considerations, and permitting requirements in San Bernardino County.

Licensed & Insured

CA B-General Contractor License #1130892. Fully bonded and insured for all Ontario construction projects.

Green Building Leaders

Net-zero, passive house, hempcrete, and 100+ sustainable methods tailored for Ontario's microclimate.

Ready to Build Green in Ontario?

Get a free estimate for your project. Our team specializes in sustainable construction across San Bernardino County.