If you’re pricing a garage floor coating in the Treasure Valley, here’s the short answer first: most professionally installed full-flake epoxy or polyaspartic garage floors in the Boise area land between $6 and $10 per square foot, all-in. For the garages we see most:
- 1-car garage (~250 sq ft): $1,500–$2,500
- 2-car garage (~440 sq ft): $2,600–$4,400
- 3-car garage (~600 sq ft): $3,600–$6,000
Those are typical local ranges for a full system — diamond grinding, crack repair, a full broadcast of decorative flake, and a UV-stable topcoat. Your exact number depends on the slab, which is why any honest contractor wants to see your concrete before quoting to the dollar. Here’s what actually moves the price.
What drives the cost
- Prep work — the part you can’t skip. A coating is only as good as what it’s bonded to. Professional installs start with diamond grinding to open the concrete’s pores, plus repairing cracks and spalls. A slab in rough shape takes more labor and material. This is also where cheap quotes cut corners — a floor that was acid-etched in an afternoon instead of ground will usually start peeling within a couple of winters.
- The system you choose. A basic single-color epoxy costs less than a full-flake system with a polyaspartic topcoat. Polyaspartic topcoats cost more up front but cure faster, resist UV yellowing, and hold up better against hot-tire pickup — worth it for most Boise garages that see summer sun through an open door.
- Size and layout. Bigger floors get a better per-foot price. Extra stem walls, steps, or an attached shop area add detail work.
- Moisture. Some slabs wick moisture from below, which can defeat a coating. A quick moisture test during the estimate catches it, and a moisture-mitigating primer adds cost when it’s needed — but it’s far cheaper than redoing a failed floor.
DIY kit vs. professional install
The big-box store kit runs a few hundred dollars, and for a storage-only garage it can be a reasonable weekend project. The honest differences: the kits are thin (often a single coat at a fraction of professional mil thickness), the prep is usually a wash instead of grinding, and there’s no warranty. Most of the floors we’re called to fix are failed kits. If the garage is your workshop, your parking spot, or part of how your home shows, the professional route usually wins on cost-per-year alone — a properly installed system is a 15–20 year floor.
How long does it take?
Our standard install runs 2 days: day one is grinding, repairs, and the base coat with flake; day two is the topcoat. You’re walking on it the next day and parking on it within a few days, depending on the system.
Boise-specific notes
Treasure Valley garages take a beating: road salt and mag chloride tracked in all winter, studded tires in some households, and big temperature swings. A full-flake system with a quality topcoat handles all of it and hoses out clean in the spring. We install year-round in Boise, Meridian, Nampa, Eagle, Star, and Kuna — heated/cooled cure windows are part of the scheduling conversation in January and July.
Get your exact number
Every slab is different, so estimates are free and take about 15 minutes. We’ll measure, check moisture, look at the cracks, and give you a written price — no pressure. Call Boise Epoxy Flooring Co. at (986) 273-5409 or request a quote through the site.
Boise Epoxy Flooring Co. LLC — licensed, Treasure Valley local. Garage floors, shop coatings, and commercial epoxy.