Worked case: a 1-car solid color epoxy garage floor in Prewett Ranch — what happens and what it costs

The scenario

Picture a single-family home on one of the Prewett Ranch streets with an attached one-car garage and a bare, swept concrete slab. The household wants a bright, wipeable floor that does not look like a showpiece and does not stretch the budget.

A tape measure along the walls gives 12 by 20 feet, which is the published average for a one-car garage. A hairline shrinkage crack runs near the door and is shallow enough to fill during prep.

The key choice is grit. The floor tracks in water from a side door, so a fine grit in the top coat is added for traction.

The household also keeps a bicycle rack, a chest freezer and two shelving units against the long wall. These sit on the floor all year, which matters for the plan: shelving feet and freezer corners are where a thin coating gets pressed and scuffed first, and a solid color shows those marks more plainly than a flake blend would.

The owner also asks whether the coating can be done in a single day. The honest answer for a one-car epoxy job is that the grinding and the coats can be finished in a day or two, while the time before parking depends on the product's data sheet.

What the job involves

1. The owner clears the garage down to the walls and the installer checks the slab for oil spots, old paint and any white powder.
2. A dust-shrouded diamond grinder opens the whole surface, and a vacuum collects the dust.
3. The hairline crack is cut, filled and ground flush; a small moisture check is made on a bare patch.
4. A primer soaks in, and the pigmented epoxy is rolled in one or two coats.
5. A clear top coat with a fine grit is rolled over the color.
6. The garage is ventilated while the coating cures and stays closed to foot traffic until the data sheet allows.

Materials and prep

• Dust-shrouded diamond grinder and HEPA vacuum
• Epoxy crack filler and primer
• Pigmented epoxy and a clear top coat with fine aggregate
• Rollers, squeegees and spiked shoes

Add-ons often paired with this job

• Coat the stem wall (garage-door threshold wall) — +$150–$400. The short wall under the garage door can be coated in the same color so the threshold matches.
• Moving garage contents out and back — +$100–$300. Moving shelving out and back is a separate line.

Why it is done this way

A solid color floor is the plainest and cheapest of the garage systems. Because there are no flakes, the film must be even; the grinding and the crack work show through a flat color more than through a flake blend.

The estimator uses the same arithmetic for every garage: a per-square-foot rate for the system, a surcharge for the condition of the slab and flat options.

The one-car size is also the easiest to see the arithmetic in. A small garage has few options to pile on, so the bid is mostly the per-square-foot rate multiplied by the area; whoever reads the bid can check it against the calculator in under a minute.

It is also the size where a store kit is tempting. The price of a kit for this garage is a few hundred dollars, which is why the prep, not the product, is the thing to compare: a rented grinder and a patient weekend do the same job the professional grinding does, if the slab is sound and dry.

What would change the price

• The crack turns out to be wider and needs the repair-area option.
• Old paint covers part of the floor and needs removal.
• A moisture test reads high and a vapor-barrier primer is added.
• The household picks a flake system in place of a solid color.
• The garage is larger than the typical 240 square feet.