Brand New House Project

We offer contractor services

Remodeling Houses

Remodeling you Home Doesn't Have to Be Expensive or Complicated!


What Our Clients Say

Don’t Take Our Words! Hear What They Say About Us.

If you're looking for a reliable, trustworthy, and talented general contractor in Winters/Sacramento area, California, Gerardo Diaz and his team are the way to go! I had the pleasure of working with Gerardo when he built my home, and I must say, I was blown away by his quality of work and attention to detail. But what truly sets Gerardo apart from other contractors is his genuine care for his clients. When I moved to Winters during the Covid lockdown, I didn't know anyone in the area. But Gerardo and his team were there for me like family. From the start, he made sure that I felt comfortable and included in the project, always keeping me informed of progress and any potential issues. Gerardo is a perfectionist who takes pride in his work. He always ensures that the job is done right and to the highest possible standard. Even when I was away from home, I trusted Gerardo completely to take care of my house and my landscaping project, which he did beautifully. He is also very patient, and he truly cares about his clients, treating them as if they were family. I appreciated that Gerardo never recommended anything excessive or expensive. He always had my best interests at heart, and he was able to work within my budget while still producing top-notch results. Gerardo completed my project on time, and he was always willing to go above and beyond to ensure my satisfaction. Overall, I would highly recommend Gerardo Diaz and his team for any home-building or renovation project. If you want someone who will care for you like family and deliver impeccable results, Gerardo is the person to call. I'm grateful to have had the opportunity to work with him, and I'm sure you will be too!
Kalindi P
"I recently had the pleasure of using Keystone Building Services and was blown away by their exceptional quality craftsmanship. Their team takes great pride in their work and it shows in the final product. I found them to be trustworthy and appreciated that they used the same team of skilled professionals across multiple disciplines and trades. Their attention to detail and commitment to excellence set them apart from other builders in the industry. I highly recommend Keystone Building Services to anyone in need of their help and I am confident they will exceed your expectations."
Christina B
Absolutely awesome experience! Gerardo and his crew were upfront, professional, and most importantly did an amazing job. I wanted a wall installed to section off a portion of my living room and Keystone delivered. The finish project looks like it's been there all along! During the build I changed my mind on a couple of items (where I wanted the door installed in the wall and changing an in-swing door to an out-swing), every time Keystone adapted and made me feel at ease. I've already asked for Gerardo and his guys' help on my next project! Couldn't recommend them more.
Shirley Jane A.