How much does a DIY epoxy garage floor cost?

One to three dollars per square foot in materials, which is $400 to $1,200 on a 400 square foot double garage. That is Canadian Concrete Surfaces' published figure for kit materials in Ontario, and two other firms give whole-kit prices that bracket it: ProEpoxy says $300 to $600 for a double garage kit and Canada Chemicals and Coatings says $400 to $1,000 for a two-car garage. None of those figures includes your time, and none includes a grinder rental.

Is a DIY epoxy floor actually cheaper in the long run?

On a 400 square foot garage over ten years, not clearly. The kit route runs $800 to $6,000 depending on whether each floor lasts two years or five, and having it done runs $1,600 to $3,600 for a single professional install that outlives the decade. The kit is cheaper at its best and more than half as expensive again at its worst. Push the period to twenty years and the kit route becomes $1,600 to $12,000 against $1,600 to $7,200.

Why does a kit only last two to five years here?

Preparation and chemistry, and the GTA climate punishes both. SurfacePro puts it plainly: professional systems use 100 percent solids resin and mechanical diamond grinding, while kits are often water-based. A kit's usual preparation step is an acid etch, which opens the surface far less than a grinder does, so the bond is weaker before the first winter. Then road salt, brine and freeze-thaw go to work on it. ProEpoxy publishes 2 to 5 years for a kit against 15 to 20 for a professional install.

What does the calculator not count?

Your labour, on either side. A DIY floor is a weekend of grinding, patching, mixing and waiting, and a professional one is a phone call and an invoice, but putting a dollar figure on somebody else's Saturday would be inventing a number. It also leaves out grinder or etcher rental, disposal of the old coating if there is one, and the cost of getting it wrong: a failed DIY coating has to come off before anything else goes on, and stripping runs $300 to $600 as a line item on a professional quote.

When is a DIY kit the right call?

When the horizon is genuinely short or the floor genuinely does not matter much. Selling within a couple of years, renting the place out, coating a shed or a workshop that never sees a car, or simply wanting the floor to look better this summer without a four-figure decision. The arithmetic on this page is not an argument against kits. It is an argument against buying one while telling yourself it is the same floor for less money.

Can I do the preparation myself and have someone coat it?

You can ask, and most applicators will say no, because the preparation is the part they are warrantying. The bond between concrete and coating is created by the grind, so a firm that did not do the grinding cannot stand behind the result. What you can usefully do yourself is the clearing out: an empty garage with the shelving unbolted and the car parked elsewhere saves crew time, and crew time is what you are paying for.

DIY Epoxy Kit or a Professional Floor: The Cost Over Time

Last updated: August 26, 2026By EpoxyFloorIndex Research Team

A kit costs about a quarter as much and lasts about a fifth as long, so comparing the two prices tells you almost nothing. What decides it is how many years you expect to be standing on the floor. Put that number in below and the calculator lays both routes out over that period, redoing the kit as often as its published lifespan says it needs redoing.

Kit or contractor, over the years you will actually own it

Floor area (sq ft)

How long do you expect to be standing on this floor?

3 years5 years10 years20 years

400 sq ft over 10 years

Over this period the two overlap: the answer depends on which end of each range you land at.

Do it yourself

$800 to $6,000

Rate: $1 to $3/sq ft
Lasts: 2 to 5 yr
Times laid in 10 yr: 2 to 5
Per year: $80 to $600

Have it installed

$1,600 to $3,600

Rate: $4 to $9/sq ft
Lasts: 15 to 20 yr
Times laid in 10 yr: 1
Per year: $160 to $360

On the comparison most favourable to the kit, cheapest against cheapest, it stops being the cheaper option in year 16.

Per year of floor: $0.20 to $1.50 per square foot doing it yourself, against $0.40 to $0.90 having it installed.

Materials and labour on the professional side, materials only on the DIY side. Nobody's weekend is costed here, because putting a dollar figure on your own Saturday would be inventing a number. Lifespans are ProEpoxy's published 2 to 5 years for a kit and 15 to 20 for a professional install. Before 13% HST.

What we could not get, and what we used instead

The obvious source for a kit price is a Canadian retailer, and we could not read one. Home Depot Canada timed out on every request, Rona returned 403 Forbidden and so did coated.ca (August 2026). A source that will not let you read it cannot carry a figure, so no shelf price appears anywhere on this page.

What is here instead is second-hand but readable: three Ontario coating companies that publish what a kit costs, in the course of explaining why you should hire them. That is a biased sample and it is worth saying so. It also happens to be internally consistent, which is the reason to trust the shape of it even if you discount the framing. Canadian Concrete Surfaces gives $1 to $3 per square foot, which on a 400 square foot double is $400 to $1,200; ProEpoxy gives $300 to $600 for that exact garage and Canada Chemicals and Coatings $400 to $1,000. Three firms with a reason to make kits look bad, converging on roughly the same number.

Take the number to a shop and check it. If the kits on the shelf are half these prices, the conclusion on this page moves in the kit's favour and you should move with it.

Published DIY epoxy kit prices for a double garage, Ontario, CAD
Kit, and the firm quoting it	Published price
DIY kit for a double garageProEpoxy	$300to $600
DIY kit for a two-car garageCanada Chemicals and Coatings	$400to $1,000

The lifespans this rests on

Every conclusion on this page turns on these four numbers, so here they are with the sentence each came from.

DIY kit: 2 to 5 years
“DIY kits ... with a typical lifespan of 2 - 5 years”
ProEpoxy
Professional installation: 15 to 20 years
“versus professional installation lasting 15 - 20 years”
ProEpoxy
Professional installation: 15 to 20 years
“With professional prep and a UV-stable topcoat, a garage floor in the GTA should last 15 to 20 years with minimal maintenance”
SurfacePro Epoxy Flooring
Epoxy flooring generally: 10 to 20 years
“Epoxy stands out by offering a lifespan of 10-20 years”
Canada Chemicals and Coatings

And the mechanism behind the gap, in the words of one of the firms: “Professional systems use 100% solids resin and mechanical diamond grinding, whereas DIY kits are often water-based (mostly water/solvent)” (SurfacePro Epoxy Flooring). Acid etching opens a slab far less than a diamond grinder does, so the bond starts weaker, and a GTA winter finds weak bonds.

How the arithmetic works, and where it is deliberately crude

Redos are rounded up. A floor that fails in year 15 of a 16-year horizon is counted as fully redone, because you cannot buy one year of floor. That rounding runs against both options identically, so it cannot tilt the comparison, but it does make the last redo look more expensive than it feels.

The two ends of each total are the honest extremes rather than a spread around a middle. The cheap end is the cheapest rate with the fewest redos; the dear end is the dearest rate with the most. Real outcomes land inside, and the width of the range is the point: it is what nobody actually knows in advance.

The crossover year is calculated on the comparison most favourable to the kit, cheapest against cheapest, so the year reported is the latest one defensible rather than the earliest. On a 400 square foot garage that is year 16.

Frequently asked questions

How much does a DIY epoxy garage floor cost?: One to three dollars per square foot in materials, which is $400 to $1,200 on a 400 square foot double garage. That is Canadian Concrete Surfaces' published figure for kit materials in Ontario, and two other firms give whole-kit prices that bracket it: ProEpoxy says $300 to $600 for a double garage kit and Canada Chemicals and Coatings says $400 to $1,000 for a two-car garage. None of those figures includes your time, and none includes a grinder rental.
Is a DIY epoxy floor actually cheaper in the long run?: On a 400 square foot garage over ten years, not clearly. The kit route runs $800 to $6,000 depending on whether each floor lasts two years or five, and having it done runs $1,600 to $3,600 for a single professional install that outlives the decade. The kit is cheaper at its best and more than half as expensive again at its worst. Push the period to twenty years and the kit route becomes $1,600 to $12,000 against $1,600 to $7,200.
Why does a kit only last two to five years here?: Preparation and chemistry, and the GTA climate punishes both. SurfacePro puts it plainly: professional systems use 100 percent solids resin and mechanical diamond grinding, while kits are often water-based. A kit's usual preparation step is an acid etch, which opens the surface far less than a grinder does, so the bond is weaker before the first winter. Then road salt, brine and freeze-thaw go to work on it. ProEpoxy publishes 2 to 5 years for a kit against 15 to 20 for a professional install.
What does the calculator not count?: Your labour, on either side. A DIY floor is a weekend of grinding, patching, mixing and waiting, and a professional one is a phone call and an invoice, but putting a dollar figure on somebody else's Saturday would be inventing a number. It also leaves out grinder or etcher rental, disposal of the old coating if there is one, and the cost of getting it wrong: a failed DIY coating has to come off before anything else goes on, and stripping runs $300 to $600 as a line item on a professional quote.
When is a DIY kit the right call?: When the horizon is genuinely short or the floor genuinely does not matter much. Selling within a couple of years, renting the place out, coating a shed or a workshop that never sees a car, or simply wanting the floor to look better this summer without a four-figure decision. The arithmetic on this page is not an argument against kits. It is an argument against buying one while telling yourself it is the same floor for less money.
Can I do the preparation myself and have someone coat it?: You can ask, and most applicators will say no, because the preparation is the part they are warrantying. The bond between concrete and coating is created by the grind, so a firm that did not do the grinding cannot stand behind the result. What you can usefully do yourself is the clearing out: an empty garage with the shelving unbolted and the car parked elsewhere saves crew time, and crew time is what you are paying for.

Sources

Read August 2026. Every firm quoted here installs floors for a living, which makes them well informed about kits and not neutral about them. Both halves of that are true and both matter.