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J-Core General Construction was founded by
Isaias gamarro more than 20 years ago, driven a passion for quality craftsmanship and exceptional service. With years of experience under our, we have built a reputation for delivering reliable and innovative construction solutions. Our commitment to excellence ensures that every project is completed to the highest standards, reflecting our dedication to our clients vision. Choose J Core General Construction for your next project and experience the difference that expertise and integrity can make.
The Nelson’s Project
SERVING THE BAY AREA
SAN FRANCISCO PALO ALTO
SAN JOSE MOUNTAIN VIEW
SUNNYVALE SANTA CLARA
SAN MATEO OAKLAND
RICHMOND MARTINEZ
VALLEJO CONCOR
For more than 20 years, J-Core has been dedicated to serving the Bay Area with outstanding service and quality. Our devotion to community and our clients has established us as a reliable name in the industry. We are excited to carry on this journey and continue top-notch solutions in the years ahead.
OUR DESIGN
The Jefferson’s Lake House
ADU Construction
Accessory Dwelling Units (ADUs) are one of the smartest investments in California today.
Whether you’re looking to generate rental income, provide independent living space for a
family member, or simply increase your property value,
J-Corp General Contractor is here to help you every step of the way.
Our ADU services include:
• Detached ADUs – Freestanding units built in your backyard.
• Attached ADUs – Units connected to your primary home.
• Garage Conversions – Transform your garage into a fully livable space.
• Basement & Attic Conversions – Convert unused space into valuable living areas.
• Planning & Permitting – We assist with all plans, applications, and code compliance.
• Full Construction – From foundation to final finishes.
We ensure compliance with all California ADU regulations and city approvals.
Get in touch today to schedule a free consultation and find out if your property qualifies for
an ADU.
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