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.
Custom Green Construction Inc. specializes in high-efficiency rainwater harvesting systems designed for the unique Mediterranean climate of Los Angeles. Our sustainable solutions help Southern California homeowners reduce water utility costs while mitigating urban runoff and supporting local drought-resilience efforts.
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Climate & Environmental Considerations
"Los Angeles faces a semi-arid climate characterized by intense, infrequent rainfall events and prolonged droughts, necessitating large-capacity storage tanks. High evaporation rates in Southern California require specialized sealed systems, while local seismic regulations demand specific structural reinforcement for any heavy above-ground or underground water storage infrastructure."
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Local Market Pricing (2026)
Service Component
Avg. Market Cost
Green Premium
Residential Rain Barrel Setup
$500 - $2,500
$100 - $400
Underground Cistern Installation
$8,000 - $18,000
$1,500 - $3,500
Whole-Home Filtration & Integration
$4,000 - $10,000
$1,200 - $2,500
* Estimates are based on AI market analysis for Los Angeles and may vary based on specific site conditions.
Frequently Asked Questions
Yes, the California Rainwater Capture Act allows residents to collect rain for non-potable uses. In Los Angeles, systems must meet specific safety standards regarding mosquito prevention and seismic anchoring. Custom Green Construction handles all local permitting to ensure your system is compliant with City of Los Angeles building and safety codes.
Harvesting rainwater in Los Angeles significantly reduces dependence on imported water and lowers monthly utility bills. It also helps manage stormwater runoff, preventing pollutants from entering Santa Monica Bay. These systems provide a reliable water source for landscaping during mandatory drought restrictions, ensuring your garden thrives while conserving precious local resources.
Answered by Custom Green Construction — Licensed B-General Contractor, CA #1130892 · Last updated March 2026