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.
Smart Pricing Engine v2.0
Instant Cost Estimator
Calculate your investment with precision. Our engine uses real-time material and labor costs to provide the most accurate ballpark in the industry.
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What are we building?
Select the project type to begin your precision cost estimate. Prices are calculated based on current California market rates.
Local Accuracy
Our data is hyper-local to the L.A. and Ventura County markets, reflecting current labor shortages and material surges.
Instant Engineering
Calculations account for standard architectural, structural and plumbing engineering fees required by CA code.
Net-Zero Ready
Every estimate includes the baseline cost for LEED-compliant sustainable practices and energy-efficient building envelopes.
Technical Construction Cost Breakdown
Precision estimation for California luxury building projects. Factors include soil stability (ASTM D1586), seismic retrofitting (CBC 2022), Title 24 energy compliance, and LEED Platinum finish specifications. Authoritative data sourced from current R.S. Means cost-indexing and Maysam Tehranchi's proprietary project ledger (Master Builder CA #1130892).