EPOXY GARAGE FLOOR COST
Published October 2026
$3–$12
PER SQ FT, PRO INSTALL
Inch Calculator’s cost guide, last updated August 2023 (read October 2026). Prep and system decide where a job lands.
~250 sq ft
PER DIY KIT, ONE COAT
Rust-Oleum EpoxyShield water-based pouch kit, per its technical data sheet.
3 days
BEFORE THE CAR GOES BACK
Vehicle traffic time for that kit at 70–80°F and 50% humidity, per the same sheet.
GARAGE EPOXY BID BUILDER
Pre-filled with a 20 x 24 ft two-car floor. Prices, hours and rate are samples: put in your supplier's price and your crew's numbers.
From the product's data sheet, after loss.
Sample. Use your supplier's quote.
Sample. Use your own production rates.
Floor area
480 sq ft
Material (5 gal)
$500
Labor
$910
YOUR PRICE
$1,833
$3.82 per sq ft
Inside the $3–$12 per sq ft band a published cost guide gives for pro installs.
Epoxy garage floor cost by garage size
Price a garage floor by its square footage, then adjust for condition. The table runs four common footprints through the $3 to $12 per square foot band, and counts the material each one needs: water-based kits at about 250 sq ft per kit, or a two-coat high-solids epoxy at about 221 sq ft per mixed gallon per coat (the mils math is below).
| Garage (example size) | Floor area | At $3–$12 per sq ft | DIY kits (1 coat) | Pro epoxy, 2 coats |
|---|---|---|---|---|
| One-car, 12 × 22 ft | 264 sq ft | $792 – $3,168 | 2 kits | 3 gal mixed |
| Two-car, 20 × 20 ft | 400 sq ft | $1,200 – $4,800 | 2 kits | 4 gal mixed |
| Two-car, 24 × 24 ft | 576 sq ft | $1,728 – $6,912 | 3 kits | 6 gal mixed |
| Three-car, 32 × 24 ft | 768 sq ft | $2,304 – $9,216 | 4 kits | 7 gal mixed |
The same guide (last updated August 2023) puts the national average near $2,000 and most jobs between $1,200 and $4,800, which is where a 400 sq ft two-car floor lands at the ends of the band. Prices may have moved since, and costs are regional: treat any national figure as a starting point, and price from your own material quotes and crew hours.
Epoxy floor coating cost by system
“Epoxy” covers very different products. The two data sheets below show the gap between a home-center kit and a heavy-duty two-part epoxy a contractor buys from a paint store, and that gap is most of the price difference between a DIY floor and a pro floor.
| Spec | Water-based kit (EpoxyShield) | High-solids epoxy (ArmorSeal 1000 HS) |
|---|---|---|
| Volume solids | 52.6–52.8% | 65% ± 2% (colors) |
| Dry film per coat | 3.0–3.5 mils | 3.0–5.0 mils |
| Coverage | About 250 sq ft per kit | 206–350 sq ft/gal per coat |
| Coats | One under most conditions | 1–2 coats, over a primer on concrete |
| Prep | Degrease, then etch | Profile to ICRI CSP 1–3; primer required |
| Foot / heavy traffic | 24 hours / vehicles 3 days | 24 hours / 48–72 hours (at 77°F) |
| Cleanup | Warm water and detergent | Reducer #54 (solvent) |
Sources: Rust-Oleum technical data ESH-39 (EpoxyShield water-based garage floor coating) and the Sherwin-Williams ArmorSeal 1000 HS product data sheet and application bulletin, both read October 2026.
On a pro system, a full decorative flake broadcast adds the flakes and often a clear topcoat, so one more material line and one more coat of labor. Fast-cure topcoats change both the schedule and the material line; price them from that product's own data sheet, the same way as below.
How many gallons: the mils math
One U.S. gallon is 231 cubic inches. Spread one mil (0.001 in) thick it covers 231,000 square inches, which is 1,604 sq ft. Multiply by the coating's volume solids and divide by the dry film you want:
sq ft per gallon = 1,604 × volume solids ÷ dry mils
- Check against the kit: 1,604 × 0.527 = 845, and the EpoxyShield sheet lists 844–847 sq ft/gal at 1 mil.
- Check against ArmorSeal: 1,604 × 0.65 = 1,043, against 1,040 on the Sherwin-Williams sheet. At 4 mils that is 260 sq ft per gallon per coat.
- Then add loss. Sherwin-Williams notes its spreading rates include no loss for surface profile, porosity, mixing or spillage. Rust-Oleum's practical figure assumes 15%. Taking 15% off 260 gives the 221 sq ft per gallon used above.
Garage floor coating cost: where the prep money goes
Two quotes for the same garage can be thousands apart, and the difference is almost always prep. The coating is a few gallons; getting the slab ready to hold it is the day of labor. Both data sheets are blunt about what the floor must be before anything goes down.
- Cure time on new concrete. Both makers call for at least 28 days; Sherwin-Williams adds “@ 75°F.” A new-build garage poured last week is a schedule problem, not a prep step.
- Oil and grease out first. Degrease and rinse before any etch or grind. An oil spot left in the slab is where the coating lets go. See how to fix peeling paint for the failure pattern.
- Profile the surface. The kit relies on its included concrete etch. The heavy-duty system calls for preparation to ICRI No. 310.2R, concrete surface profile CSP 1–3, with the slab free of laitance, curing membranes and hardeners. On most jobs that means a diamond grinder or shot blaster, which is equipment, dust control and hours on the bid.
- Sealed or coated floors. Rust-Oleum states a sealer has to be removed by grinding or shot blasting. Over sound old paint, Sherwin-Williams says to dull the surface, apply a test area and let it dry a week before testing adhesion.
- Holes, cracks and moisture. Bug holes and voids get filled before the primer. The kit's sheet says it is not for floors with a moisture problem, and the Sherwin-Williams bulletin lists ASTM F1869 for measuring moisture vapor emission. Run the plastic-sheet moisture test at the walk-through and price the job only when the slab passes.
Epoxy basement floor cost and other slabs
A basement slab prices the same way as a garage: square footage, system, prep. The difference is risk. Basement floors sit on the ground with no air underneath, so the moisture test decides the job before the price does. If the slab fails, the honest quote is a moisture-tolerant system or no coating at all, and the concrete painting guide covers the basement-specific steps. Driveways and patios are outdoor work: check the product's exterior and UV limits on its data sheet before you include them.
Pricing a garage epoxy job as a painter
Epoxy floors are an add-on many painting contractors already get asked for. Price them like any other job: materials at your cost, crew hours at a billed rate that carries burden and overhead, then markup. The bid builder above does exactly that. Two numbers keep it honest.
- The wage is not the rate. The Bureau of Labor Statistics puts the median pay for construction and maintenance painters at $23.75 an hour (May 2025). Payroll taxes, insurance, the truck and the grinder rental sit on top. Work it out with the painting labor cost calculator and the overhead calculator.
- Markup is not margin. A 30% markup is a 23% margin. Check yours with the markup calculator.
The data sheets also set your schedule, and the schedule is labor you either bill or eat:
| Timing | Water-based kit | ArmorSeal 1000 HS |
|---|---|---|
| Application window | 60–85°F, RH ≤ 85%, 5°F above dew point | 50–120°F, RH ≤ 85%, 5°F above dew point |
| Pot life once mixed | 1–2 hours, shorter when warm | 4 hours at 77°F |
| Recoat | One coat under most conditions | 8 hours to 7 days at 77°F; abrade past 7 days |
| Foot traffic | 24 hours | 24 hours at 77°F, 48 hours at 50°F |
| Cars back in | 3 days | Heavy traffic 48–72 hours; full cure 7 days at 77°F |
DIY epoxy kit vs pro install
| DIY water-based kit | Pro two-part system | |
|---|---|---|
| Film per coat | 3.0–3.5 mils dry | 3.0–5.0 mils dry, 1–2 coats over primer |
| Prep | Degrease and acid etch | Grind or shot blast to CSP 1–3, fill voids |
| Moisture check | Not for floors with a moisture problem | Measured (ASTM F1869 listed) |
| Who it suits | A sound, unsealed slab and a careful owner | Oily, sealed, coated or worn floors |
| What you pay for | Material and your weekend | Equipment, crew hours, schedule |
When a homeowner asks why your number is three times the kit, this table is the answer. Put the prep method and the film build in writing on the estimate so the comparison is like for like.
Epoxy garage floor cost cheat sheet
- Pro install
- $3–$12 per sq ft (2023 guide)
- National average
- About $2,000 (same guide)
- Coverage formula
- 1,604 × volume solids ÷ dry mils
- Loss allowance
- 15% (Rust-Oleum's practical figure)
- DIY kit
- ~250 sq ft per kit, one coat
- Pro epoxy at 4 mils
- ~221 sq ft/gal per coat after loss
- New concrete
- 28 days before coating
- Cars back in
- 3 days (kit) · 48–72 h heavy traffic (ArmorSeal, 77°F)
Pricing a full repaint alongside the floor? Start from how to price painting jobs.
Epoxy garage floor cost: common questions
How much does it cost to epoxy a 2-car garage?
At the $3 to $12 per square foot band in Inch Calculator's cost guide (last updated August 2023), a 20 × 20 ft two-car garage (400 sq ft) runs about $1,200 to $4,800, and a 24 × 24 ft one (576 sq ft) about $1,728 to $6,912. The same guide puts the national average near $2,000. Prep and the coating system decide where a job lands.
What is the average cost to epoxy a garage floor per square foot?
Inch Calculator's cost guide (last updated August 2023) gives $3 to $12 per square foot for a professional install. A DIY water-based kit costs far less per foot because it is one thinner coat with an acid etch instead of grinding, so the two are not the same floor at different prices.
How long before you can park on a new epoxy garage floor?
Rust-Oleum's EpoxyShield water-based kit lists 3 days for vehicles at 70 to 80°F. Sherwin-Williams' ArmorSeal 1000 HS lists 48 to 72 hours for heavy traffic and 7 days to full cure at 77°F, stretching to 4 to 5 days and 10 days at 50°F.
Can you epoxy over a painted or sealed garage floor?
A sealer has to come off by grinding or shot blasting, per Rust-Oleum. Over sound old paint, Sherwin-Williams says to dull the surface, coat a test area and wait a week before checking adhesion; if adhesion is poor the old coating comes off. Peeling paint is removed down to sound concrete.