Business Details
44 Years
experience
Your Trusted Bay Area Construction Partner Since 1982
Founded in 1982 by John Hagenbach, our company has built a reputation for excellence in residential and commercial construction across the East Bay. With over 38 years of experience, we specialize in new home construction, room additions, ADUs, and full-scale remodels while maintaining a steadfast commitment to quality craftsmanship. Our team of 20+ professionals prioritizes safety, transparency, and client satisfaction through personalized service and meticulous project management.We approach every job site with the same care as our own homes, ensuring clean, organized environments that foster productivity and superior results. Our deep understanding of local building codes and regional challenges enables us to deliver stress-free solutions tailored to each client's unique needs.
Services
New Home Construction
Room Additions
ADUs & Casitas
Kitchen Remodels
Bathroom Remodels
Multi-Room Renovations
Pre-Construction Services
Project Design
Project Engineering Support
Project Scheduling
Details
- Year established: 1982
Highlights and features
- We offer 38 years of hands-on construction experience with a proven track record of excellence
- Our team maintains active California General Contractor licenses (#B-426275)
- We implement a comprehensive safety program exceeding industry standards
- Our projects consistently finish on time while exceeding client expectations
- We provide personalized service with direct owner involvement in every project
What people say
Exceeded expectations
Stress-free process
Meticulous planning
On time
Exceptional workmanship
Services
New Home Construction
We specialize in constructing custom-designed homes that meet exacting quality standards while adhering to client specifications and timelines. Our process combines architectural expertise with hands-on project management to deliver energy-efficient, structurally sound residences. Clients benefit from our deep understanding of local building codes and regional construction challenges.
Room Additions
Our room addition services transform existing spaces to meet evolving needs while maintaining structural integrity. We handle everything from initial design consultation to final permitting and construction. Clients receive tailored solutions that seamlessly integrate with their current home architecture and functionality requirements.
ADUs & Casitas
We design and build accessory dwelling units that maximize property value while providing functional living spaces. Our team navigates zoning regulations and utility connections to create code-compliant secondary units. Clients gain versatile spaces for family members, rental income opportunities, or home offices.
Kitchen Remodels
Our kitchen remodeling services combine aesthetic design with practical functionality improvements. We handle complete gut renovations and targeted upgrades while maintaining structural safety standards. Clients receive optimized layouts, modernized plumbing/electrical systems, and durable material selections that enhance home value.
Bathroom Remodels
We deliver comprehensive bathroom renovations that improve both aesthetics and functionality. Our process addresses waterproofing, code compliance, and accessibility considerations while incorporating modern design elements. Clients benefit from customized storage solutions, updated fixtures, and durable surface materials.
People
John Hagenbach
Owner
John founded Hagenbach Construction in 1982 with 38 years of hands-on experience in residential and commercial construction. He personally oversees projects to ensure quality craftsmanship and client satisfaction. His expertise spans new builds, complex remodels, and ADU construction across the Bay Area.
Questions
What construction services do you specialize in?
We specialize in new home construction, room additions, ADUs/casitas, and full kitchen/bathroom remodels throughout the San Francisco Bay Area.
Are you licensed and insured?
Yes, we hold active California General Contractor license #B-426275 and maintain comprehensive insurance coverage for all projects.
How do you handle project timelines?
We provide detailed schedules during pre-construction planning and maintain regular communication to ensure timely completion while addressing any unexpected challenges.
What areas do you serve?
We serve the entire San Francisco Bay Area including Fremont, Walnut Creek, San Ramon, Danville, Pleasanton, Livermore, and surrounding communities.
How do you ensure construction quality?
Our quality assurance process includes regular inspections, use of premium materials, and experienced crews supervised by senior foremen throughout every project phase.
Can you help with design and planning?
Yes, we offer comprehensive pre-construction services including design consultation, cost estimation, and engineering support to ensure successful project outcomes.
Reviews (2)
Nick Watts
Nov 21, 2020
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Positive:Quality
I've personally worked with Hagenbach Construction personnelly over the years. I found the company to have some of the best quality people and quality craftsmanship with great service to back it up!
I've personally worked with Hagenbach Construction personnelly over the years. I found the company to have some of the best quality people and quality craftsmanship with great service to back it up!
Michael Chen
Oct 11, 2019
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This is my first Yelp review and it is way overdue. We bought a fixer-upper (built in early 70s, original) and was in search of a contractor to do a full interior remodel of our house sometime last year. We interviewed John and three others (searching for trustworthy partner with great quality craftsmanship at reasonable price, not the lowest.. but fair). John was reasonable with his pricing, but most importantly, John came across as an honest and trustworthy man (with emphasis, gentlemen's handshake type of guy), straight forward, very knowledgeable, transparent, and not afraid to speak his mind
