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Business Details
Custom Home Additions and ADUs in Oakland
At Kobban Builders, we approach every project with a commitment to quality, sustainability, and lasting customer relationships. Our team specializes in transforming homes through second story additions, ADUs, and custom remodeling, prioritizing craftsmanship and client satisfaction. With nearly 30 years of industry experience, we integrate eco-friendly materials and energy-efficient practices into every build. We partner closely with homeowners, architects, and designers to deliver personalized solutions that align with individual needs and budgets. Our process emphasizes clear communication, detailed planning, and minimizing disruption to daily life.

We pride ourselves on treating every projectlarge or smallwith equal dedication, ensuring timely completion and transparent cost management. Our founder, Gabriel Kobban, brings decades of expertise in residential and commercial construction, backed by a licensed, insured, and skilled team. Customer trust is our foundation, reflected in our repeat clientele and referrals. We work throughout the East Bay, prioritizing long-term value over short-term gains. Our goal is to make the remodeling experience enjoyable while creating spaces that enhance both functionality and beauty for generations.
Services
Second Story Additions ADUs (Accessory Dwelling Units) Home Remodeling Sustainable Building Custom Home Projects
Highlights and features
  • We offer 30 years of combined building expertise with personalized service.
  • Our process includes detailed timelines and transparent cost approvals.
  • We prioritize sustainable materials and energy-efficient construction methods.
  • Our team is licensed, insured, and bonded for client protection.
  • We specialize in complex second story additions and ADU projects.
Associations and certifications
  • California Contractors State License Board (CSLB)
What people say
Smooth process Thrilled with job True artistry Dedicated workers Stunning results
Services
Second Story Additions
We specialize in constructing second story additions to maximize living space. Our process includes architectural collaboration, cost estimation, and timeline planning. Clients benefit from customized designs that align with family needs while maintaining structural integrity and aesthetic harmony with existing homes.
ADUs (Accessory Dwelling Units)
Our ADU construction services create versatile living spaces for rentals, family members, or home offices. We coordinate permitting, financing, and design to ensure compliance and functionality. Projects enhance property value while providing flexible, code-compliant structures tailored to client goals.
Home Remodeling
We handle full-scale home remodeling projects focusing on kitchens, bathrooms, and historic restorations. Our team preserves architectural details while modernizing functionality. Services include material selection, timeline management, and minimizing construction disruptions for occupied homes.
Sustainable Building
Our sustainable building approach integrates energy-efficient systems and eco-friendly materials. We prioritize durability and environmental responsibility in all projects. Services include energy retrofits, material sourcing guidance, and construction methods that reduce long-term maintenance costs and environmental impact.
Custom Home Projects
We deliver bespoke home building solutions for unique architectural visions. Services span from initial design collaboration to final execution. Our team specializes in balancing creative design with practical functionality, ensuring each project meets specific lifestyle needs and aesthetic preferences.
People
Gabriel Kobban
Founder & Licensed General Contractor
Gabriel Kobban has 30 years of building experience, including 20 years leading Kobban Builders. He specializes in residential additions, historic restorations, and sustainable construction. Licensed in California (CA #873229), he prioritizes client collaboration and artisan craftsmanship.
Questions
What types of projects does Kobban Builders specialize in?
We specialize in second story additions, ADUs, home remodeling, and sustainable building projects throughout the East Bay area.
How does Kobban Builders handle project timelines and budgets?
We provide detailed proposals with timelines, milestones, and cost approvals. Changes require written consent to ensure transparency and budget control.
Do you offer financing options for ADU construction?
Yes, we connect clients with experienced ADU lenders and help navigate construction financing options to support project completion.
Are your services available outside the East Bay area?
We primarily serve the East Bay of the San Francisco Bay Area but consider select projects beyond this region based on scope.
What credentials does Kobban Builders hold?
We hold California General Contractor License #873229 and maintain full bonding, insurance, and workers' compensation coverage.