About Keystone Building Services
Sacramento's trusted general contractor — built on 11 years of hands-on experience, an uncompromising commitment to quality, and the belief that every home deserves to be built the right way.
Photo: Gerardo Diaz
CEO / President
Meet Gerardo Diaz
“I started 11 years ago, learning the trade the right way — constantly studying building codes and emulating contractors with far more knowledge than I possessed. Four years ago, I felt ready to apply for my license, and fortunately, everything went smoothly. Since then, I have worked to build an impeccable reputation; my primary focus is delivering a high-quality product to my clients — one that will last for generations and that they can proudly show off.”
Before founding Keystone Building Services, Gerardo earned his stripes as a licensed electrician — a background that gives him a rare edge in the general contracting world. He understands what goes on behind the walls, not just in front of them.
That electrical expertise means fewer subcontractor coordination headaches, fewer surprises during remodels, and a deeper understanding of building code requirements across every trade. When Gerardo inspects a project, he sees the full picture.
“We don't take shortcuts no matter the cost, right way and quality comes first always and the most important, I never hide when problems show up.”
— Gerardo Diaz, CEO / President
Our Values
We are a trustworthy construction company chasing quality and sticking to building codes to ensure customer safety.
No Shortcuts
Quality Over Speed
We don't take shortcuts no matter the cost. The right way and quality come first, always. Every material is chosen for durability, every joint is built to last.
Code Compliance
Safety First
We chase quality and stick to building codes to ensure customer safety. Gerardo's background as a licensed electrician means we understand code inside and out.
Transparency
Never Hides From Problems
The most important thing — we never hide when problems show up. You'll always know exactly where your project stands, what we found, and what it takes to fix it.
Craftsmanship
Built to Last Generations
Our primary focus is delivering a high-quality product — one that will last for generations and that you can proudly show off. We build homes, not just projects.
Licensed, Bonded & Insured
Every credential verified. Every project protected. Your peace of mind is non-negotiable.
CA Contractor License
General Building — Active
BuildZoom Score
Top 16% of CA Contractors
Contractor Bond
Bonded & Protected
Workers' Comp Insurance
Fully Insured Team
Ready to Work With a Contractor You Can Trust?
Get a free, no-obligation estimate for your project. We'll walk you through every step before any work begins.