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Business Details
28 Years
experience
Custom Home Builders in Sunnyvale, CA
Founded in 1998, JKF has dedicated over 25 years to crafting custom homes and executing high-quality remodeling projects across the San Francisco Bay Area. Our approach combines structural expertise with personal integrity, ensuring every project reflects both technical precision and a deep understanding of what makes a house a home. We prioritize relationships, relying on client satisfaction and referrals rather than advertising, and maintain a network of skilled craftsmen who share our commitment to excellence.

Our process begins with early engagement to align design with budget, continues through meticulous permitting and construction phases, and concludes with a seamless handoff supported by ongoing client relationships. With a foundation built on trust and a passion for construction, we deliver spaces tailored to our clients' evolving needs while adhering to the highest standards of craftsmanship and service.
Services
Custom Homes Custom Remodeling Preliminary Design Permit Submittal Breaking Ground
Details
  • Year established: 1998
Highlights and features
  • We offer 25+ years of experience in custom home construction and remodeling.
  • Our team prioritizes personalized service and client trust above all else.
  • We employ a network of skilled craftsmen committed to quality and affordability.
  • We provide transparent, budget-conscious solutions tailored to client needs.
  • Our process includes early design collaboration to ensure project success.
Associations and certifications
  • California State License Board (CSLB)
What people say
Immediate trust Beautiful new master suite Commitment to quality workmanship
Services
Custom Homes
We design and build custom homes tailored to client preferences, from foundational planning to final finishes. Our process ensures structural integrity while incorporating personalized details that reflect homeowners' lifestyles. With expertise in diverse architectural styles, we deliver spaces that balance aesthetics, functionality, and long-term value.
Custom Remodeling
Our remodeling services enhance living spaces through thoughtful design and precise execution. Whether expanding a single room or renovating an entire house, we prioritize budget-conscious solutions that align with clients' evolving needs, ensuring minimal disruption and maximum satisfaction.
Preliminary Design
We collaborate early in the design phase to provide structural feedback, cost estimates, and timeline projections. This ensures alignment between client vision, architectural plans, and practical execution, reducing risks of delays or budget overruns.
People
Jeffrey K. Frankenfield
President & CEO
Jeff Frankenfield founded JKF in 1998 after working as a carpenter for Bay Area contractors. He holds a liberal arts degree from Sonoma State University and emphasizes integrity, craftsmanship, and client relationships in every project.
Questions
What services does JKF offer?
JKF specializes in custom home construction and remodeling, including design collaboration, permitting, and full-scale project execution.
How long has JKF been in business?
JKF has served the Bay Area since 1998, with over 25 years of experience in custom home projects.
Do you work outside the San Francisco Bay Area?
While our focus is the Bay Area, we consider projects beyond this region based on scope and client needs.
How do you ensure project quality?
We use a vetted network of craftsmen and leverage technology for planning, ensuring every detail meets our high standards.
Can you assist with financing options?
We do not offer direct financing but can guide clients toward reputable third-party financing solutions.