Business Details
50+ Years
experience
Your Trusted Construction Partner in Concord, CA
Devengenzo & Company & Company has been a trusted name in residential construction and engineering since 1970. As a family-owned business rooted in the San Francisco East Bay, we specialize in total project management across Contra Costa and Alameda Counties. Our legacy of excellence began with Robert and Marilyn Devengenzo & Company & Company, whose values of innovation and integrity continue to guide our approach. We pride ourselves on delivering high-quality craftsmanship through skilled teams and proven methodologies. Our expertise spans custom home builds, renovations, and complex engineering solutions tailored to client needs.Diamond Certified recognition validates our commitment to superior service and customer satisfaction. With decades of local experience, we navigate municipal requirements efficiently to ensure seamless project execution. Our team combines technical proficiency with personalized service, treating every project as if it were our own. From initial design to final completion, we maintain transparent communication and meticulous attention to detail. This enduring dedication to excellence has earned us long-term client relationships and industry recognition.
Services
Custom Home Builds
ADU Construction
Drainage Systems
Kitchen Remodels
Structural Repairs
Retaining Walls
Concrete Pavers
Sewer Systems
Project Management
Engineering Solutions
Details
- Year established: 1970
Highlights and features
- Family-owned since 1970 with deep local expertise
- Diamond Certified for quality and customer satisfaction
- Experienced team handles all project phases seamlessly
- Specialized in navigating East Bay municipal requirements
- Proven track record with complex residential projects
Associations and certifications
- Diamond Certified
What people say
Top of the line
No corners cut
Professional crew
Excellent work
Prompt service
Services
Custom Home Builds
We create bespoke residential properties tailored to client specifications. Our process combines architectural precision with practical engineering solutions. From foundation to finishing touches, we ensure every detail meets our exacting standards while maintaining compliance with local regulations.
ADU Construction
Specializing in accessory dwelling units that maximize property potential. Our ADU solutions optimize space efficiency while maintaining aesthetic harmony with existing structures. We handle permitting, design, and construction through our experienced team of specialists.
Drainage Systems
Engineered drainage solutions prevent water damage and improve land usability. We design and install comprehensive systems including French drains, catch basins, and grading solutions. Our expertise ensures long-term functionality and compliance with municipal requirements.
Structural Repairs
Comprehensive structural assessment and repair services restore building integrity. Our team addresses foundation cracks, settling issues, and seismic reinforcement using industry-approved methods. We prioritize safety while maintaining structural aesthetics.
Project Management
End-to-end project coordination ensures timely and budget-conscious delivery. Our management approach integrates design, permitting, and construction phases under one umbrella. We maintain transparent communication throughout the project lifecycle.
People
Nick Devengenzo
President/CEO
Third-generation construction leader with 25+ years of industry experience. Oversees strategic operations while maintaining hands-on involvement in complex projects. Committed to upholding family legacy of excellence.
Erin Devengenzo-Miller
Office Manager
Manages daily operations with 15 years of construction administration expertise. Ensures seamless coordination between field teams and client communications. Implements efficient office protocols to support project success.
Luis Arellano
Drainage Foreman
Specializes in water management systems with 18 years of field experience. Leads drainage crews in implementing complex stormwater solutions. Maintains technical proficiency through ongoing industry training programs.
Jaime Hernandez
Carpenter Foreman
Master carpenter with 20 years of residential construction experience. Oversees framing and finish work teams. Known for precision craftsmanship and mentoring junior staff in traditional building techniques.
Andrea Devengenzo
Customer Relations
Manages client communications with 12 years of construction industry experience. Coordinates project inquiries and website operations. Focuses on maintaining the company's reputation for exceptional service standards.
Questions
What areas do you serve?
We specialize in residential projects throughout the San Francisco East Bay, including Contra Costa and Alameda Counties.
Are you licensed for engineering work?
Yes, we hold CSLB contractor license #566986 covering both construction and engineering services in California.
How do you handle project timelines?
We provide detailed schedules during planning and maintain regular updates to ensure timely completion of all phases.
What sets you apart from competitors?
Our family legacy combines proven expertise with personalized service, backed by Diamond Certified quality recognition since 1970.
Can you handle complex drainage issues?
Yes, our specialized drainage team implements comprehensive water management solutions for residential properties of all sizes.
Do you work on historic homes?
We have extensive experience preserving architectural integrity while modernizing systems in older homes across the East Bay.
