Demolition, debris removal, rough grading and fine grading

Serving Santa Clara, San Francisco, San Mateo, Contra Costa, Alameda & Santa Cruz Counties

They provide superior work, are extremely knowledgeable in their field and are with you every step of the way during a project, handling any complications that may arise. Their pricing is fair and all inclusive."

- Jill Bengston, Director of Property Management, DivcoWest Silicon Valley Investments

Surface prep and grading done wrong can shorten the life of your asphalt or concrete.

We can't have that. That's why we like to get our hands in the dirt.

The final outcome of a surfacing project hinges on the care invested in prep work.While some contractors may skimp on the front end, ASI never will. From the drainage to the compaction to the slopes and weight bearing characteristics of the soil, every detail impacts the end result. 

It has to be right.

Hire ASI to do your grading and here's how we get your property ready – the right way.

Debris Removal & Demolition

Before we lay paving, the project area must be free of debris. We reuse and recycle materials wherever possible for environmentally friendly project outcomes.  

  • Brush, shrubs and other organic debris will be removed and mulched;
  • Current asphalt and concrete will be demolished and recycled;
  • Structures and other debris will be cleared as needed.

grading debris and demolition bay area

Rough Grading & Sloping

Hire ASI for grading to prep your subsurface for a smooth, level and precise base that sets the stage for a flawless surface.

Once the area is cleared, ASI digs in with rough grading.

We coordinate with surveyors to stake streets, pads, slopes, curbs and walkways before the utilities are installed.

We also follow their specifications for proper drainage and runoff. No matter how torrential the downpour, we don't want your tenants or employees wading through 5 inches of water to get to the front door. We make sure that doesn't happen.

Soil Stabilization

To prevent soil settling and resulting dips and bumps in your asphalt or cracks in your concrete, we can stabilize soft soil with mixtures of lime or cement to help reduce its swelling tendencies, increase water absorption, and strengthen its load-bearing characteristics. 

Fine Grading 

Months may have passed since we did the rough grading and after countless contractors, sub contractors, projects, and excavations, including the laying of underground utilities, it's time for us to return and do the final fine grading to smooth things out once again and remove debris and soil that may have collected during that time. 

Shall we dig in? Then request quote.

With ASI's hand in the dirt doing the grading and prep work, you can be assured your subsurface will be prepared properly for the asphalt or concrete that follows. That's because we specialize in the top surface as well and know what's required down below to give you the best results above. 

And because our goal is to have happy, long-lasting customer relationships, we promise to give you our best.

Learn more about our asphalt and concrete services, or if you're ready to get going, request a quote now. 

We work with clients in San Jose, Fremont, Palo Alto, Redwood City, Milpitas, Oakland, San Francisco, Morgan Hill and all points in between. 

Save yourself a headache or 2!

You can hire ASI as your general contractor too

ASI is a general engineering contractor and as such can manage subs for all the underground utilities. The benefit to you is you have just one source of accountability (that's us), and because we know how important the underground is for the final surface, we'll make sure it's done right. 

We Serve These Bay Area Customers


  • HOAs
  • Mobile Home Parks


  • Business Parks
  • Shopping Centers
  • Offices
  • Retail


  • Schools
  • Churches
  • Hospitals
  • Government


  • Manufacturing
  • Warehousing
  • Shipping