Flooring Contractor in Ashland, CA - Prep-First Floors for Homes and Shops
Cornerstone Dublin Epoxy Flooring coats, polishes, seals and resurfaces concrete in Ashland, CA. We grind and repair the slab first, then put down epoxy, polyaspartic or polished finishes on garages, patios, basements, pool decks and shop floors.

Get your Ashland floor looked at
I check the slab for cracks, moisture and old coatings before we talk finishes.
Request an estimateAshland: close-built blocks and hard-used garages
Ashland sits between San Leandro and Castro Valley, and it's county ground, not its own city, which matters when we get to permits. Shops, markets and small businesses line East 14th Street. The blocks off it are full of houses, duplexes and apartment buildings set close together, and plenty of them have some years on them.
That shapes the job. Garages here usually do double duty as parking, storage and a workshop, so the slabs we see carry oil, old paint and coatings that have started to let go, and on tight lots we plan where our equipment goes before we arrive.
Working in Ashland: the county sets the rules here
Ashland has no city government, so Alameda County is the office we deal with, and the county has said its building inspection division issues permits and does inspections for private construction across its unincorporated areas. Whether your floor needs a permit depends on the work, so we check with the county before anything starts, and when one's needed we handle the paperwork and build the county's review and inspections into your schedule. Before you hire anyone, ask about two things: a state contractor's license, covered in the questions below, and the county Business License, an annual tax the county requires for any business working in its unincorporated areas, even a contractor based somewhere else or already licensed by another city. We're licensed and insured, and we're based in Dublin, close enough that I come out and look at every job myself.
Price and schedule both turn on what the slab needs before anything goes on it, more than on square footage alone, and outdoor work also waits on dry weather. On busy stretches like East 14th Street we work out where our truck and equipment sit before day one, so a shop's customers or a neighbor's driveway aren't boxed in. I look at the floor in person and you get the estimate in writing.
Services in Ashland, CA
Garage Floor Coatings
Garages here usually double as parking, storage and a workshop. We grind the slab, fill the cracks and put down a coating that stands up to oil and hot tires.
Concrete Grinding & Surface Preparation
Many slabs here carry paint, sealer or glue from past owners. We grind to clean, open concrete first, because that's where a coating holds or lets go.
Concrete Floor Stripping & Removal
When an old coating is peeling in sheets, a new one over it just buries the problem. We strip it off, haul it away and check the concrete underneath.
Commercial & Industrial Epoxy Floor Coatings
Shops along East 14th Street can't close for a week over a floor. We plan the prep and coating around your business hours.
Read more about Commercial & Industrial Epoxy Floor Coatings
Concrete Sealing
Bare patios and walkways soak up water and stains, and wet winters make it worse. We clean and prep the surface, then use concrete sealing to keep water and oil out.
Concrete Resurfacing & Overlays
Older patios and steps around here often show worn surfaces, scaling or patchy repairs. When the slab underneath is sound, we lay an overlay instead of tearing it out.
Get a written floor estimate for your Ashland property
Send the form and we'll reply within one business day to set a time. I come out to your Ashland property myself, look at the floor in person and give you a written estimate. It's free, and there's no obligation.
- Phone
- (925) 230-5014
- Location
- Dublin, CA 94568
- Hours
- Mon–Fri: 8 AM–11 PM, Sat–Sun: 7 AM–11 PM
- Credentials
- Licensed and insured.
What Ashland owners can count on
We're based in Dublin, CA and cover 16 services across 12 service areas, Ashland among them. We're licensed and insured, give free quotes on site, and our work is backed by our satisfaction guarantee.
- Based in
- CA
- Dublin
- Services
- 16
- Service areas
- 12
- Licensed and insured.
- Free quotes on site.
- We respond within 1 business day.
Frequently asked questions
How do I apply for a building permit in Ashland, CA?
You apply through the Alameda County Permit Portal, the county's online system for applying for building permits, sending in plans, booking inspections and checking permit status, and the county's permits page is the place to start. When a floor job of ours needs a permit, we take care of the paperwork, and you can still look up where it stands.
When does a flooring contractor need a California state license?
A contractor needs a license from the Contractors State License Board when the job needs a building permit, uses any additional workers, or costs $1,000 or more in labor and materials. That covers most real floor jobs, so ask for the license before you sign anything.
How much does an epoxy garage floor cost in Ashland?
The price on an Ashland garage comes from the size of the floor and how much work the slab needs before the coating goes on. Grinding off old paint or a failed coating, repairing cracks and dealing with moisture add the most, and a flake or metallic finish costs more than a plain coat. I look at the floor in person and give you the number in writing.
When is the best time to coat a patio or pool deck in Ashland?
Late spring through early fall is usually the best window, because nearly all of Alameda County's rain falls between October and April. Outdoor coatings need dry concrete going in and dry weather while they cure, so we plan patio and pool deck jobs around that. Garages and indoor floors can usually go ahead any time of year.
What causes cracks in concrete garage floors in Ashland?
Most cracks come from the concrete shrinking as it cured and from the ground settling under it over the years. This is also earthquake country, with fault zones running through heavily populated parts of the county along the Hayward Fault, though that doesn't put any one lot in a zone. We open up and fill cracks before coating, and if a crack is still moving, I'll tell you, because a coating won't stop that.
What causes an epoxy garage floor to peel?
Peeling usually traces back to the concrete under the coating, not the coating itself. The slab wasn't ground, was still oily, or had moisture coming up through it. That's why we grind to clean concrete and check for moisture first, and if your slab isn't ready yet, I'll say so.
Ask about your Ashland floor today
Call (925) 230-5014 or use the form, and I'll walk you through what your slab needs and the permit steps with the county.




