How to Price an Epoxy Garage Floor Job | Reddit & LinkedIn

The coating is the visible product, but slab prep is where the money is. A clean, sound slab grinds fast and coats in a day. A slab with oil staining, cracks, spalling, or moisture needs grinding, repair, and sometimes a moisture barrier, and that labor can exceed the coating cost. Price prep as its own line so the customer understands why two epoxy quotes for the same garage can differ by hundreds of dollars.

A standard two-car garage of about 400 square feet runs roughly $1,600 to $3,600 installed in 2026. Single-coat polyaspartic systems land at the lower end, while full flake epoxy with a polyaspartic topcoat lands higher. Per square foot, most residential jobs price at $4 to $9 installed, with heavy prep or premium systems pushing above that. Quote per job using square footage, prep, and coating tier, not a flat per-foot number that ignores the slab.

Walk the slab before you quote. Note oil spots, cracks wider than a hairline, pitting, and any prior coating that has to come up. Diamond grinding is the standard prep, and its cost scales with slab condition. Crack and pit repair, along with a moisture test on slabs at risk, belong as separate lines. If you cannot fully assess the slab until you grind, add a note that additional repair will be a stated change order, so a bad slab does not become a loss.

Match the system to the use, not just the price. A single-coat polyaspartic is fast and durable and works for most homeowners who want a clean, one-day floor. A full flake epoxy with a polyaspartic topcoat gives a thicker, more decorative finish for garages that double as workshops or gyms. Quote the system as its own line, and offer a base and an upgrade tier so the client chooses without you losing the job on the top number.

ContractShield lets you save an epoxy template with your per-square-foot coating cost, grinding and repair rates, and labor, so a new quote is a quick edit from the square footage and slab condition. Snap a photo of the garage, enter the numbers, and send an itemized, signable estimate the same day. You run the job and invoice on milestones for a flat 2% per job (1% each side), capped at $250, no per-lead fees.

Moisture is the hidden risk on a garage slab, especially below grade or on newer concrete. A coating that goes over a wet slab can delaminate, and that callback is on you. For at-risk slabs, price a moisture test and, if needed, a moisture-tolerant primer as separate lines. Also set the schedule honestly. A multi-coat epoxy needs cure time between coats, so the garage may be off limits for a day or two. Naming cure time in the quote prevents the client from parking on a floor that has not set.