Quartz vs. Granite Countertops: Which One for an Ontario Kitchen, and Why

The answer, before the article

For most Ontario families in 2026, mid-tier quartz. It is consistent, it needs nothing, it hides a seam better than the designer patterns, and it is what the next buyer expects. Buy granite instead if you cook hard and put hot pans down, if you want the cheapest real stone and level 1 granite at $85 is it, or if you want a slab nobody else has. Buy neither and read the countertop cost guide if what you actually want is quartzite, which looks like marble and behaves like granite, for $35 a foot more.

Side by side

Cost, honestly

At the low end they are the same money: level 1 granite and builder-tier quartz are both about $85 per square foot installed in Ontario, which for the 59 square foot reference kitchen on this site is about $5,000 before cutouts. The difference is what you get for $85. In granite it is a real stone in a common colour, speckled grey, black or tan, that takes heat and needs sealing. In quartz it is a plain white or grey with little or no pattern that needs nothing.

At the middle, quartz costs more: $105 for the mid-tier patterns most people choose against $85 for granite. That $20 a foot is $1,200 on the reference kitchen and buys you the no-maintenance and the consistency. At the top, the exotic granites at $120 and the designer quartz at $135 are both paying for pattern, not performance, and the quartzite at $140 that people really want when they ask for “the marble look” is more than either. The full table and the per-kitchen numbers are in the cost guide, and the calculator prices your footage in both.

The hot pan question

This is the one that decides it for people who cook. Quartz is 10% resin, and resin does not like heat: a roasting pan from a 220 C oven set straight on a quartz counter can leave a dull mark, a discoloured ring, or in the worst case a crack running from a sink or cooktop cutout where the stone was already stressed. It does not happen every time. It happens often enough that every quartz warranty excludes it. Granite does not care. You can take a pot off the burner and set it down.

If your household uses trivets without thinking, quartz is fine. If you know, honestly, that somebody in the house will set the pan down where it lands, buy granite and stop worrying, or buy quartzite and get both the look and the heat tolerance.

The sealing question

Granite is porous. A sealer soaks into the surface and fills the pores so wine and oil sit on top long enough to wipe up. It wears off over a year or two. Resealing is a $20 bottle, a rag and ten minutes, and the test is a drop of water: if it beads, you are fine; if it soaks in and darkens the stone, seal it. People hear “sealing” and imagine a contractor and a weekend. It is closer to oiling a cutting board.

Quartz needs none of this and that is its whole argument. For a household that will not remember the sealer, that argument is worth the $20 a foot.

The slab question

Quartz is made to be identical. The 4-inch sample in the showroom is the slab, every slab, which is why you can choose it from a chip and why the seam between two slabs of a small-fleck pattern nearly disappears. Granite is quarried, and the sample is a hint. Two slabs of the same name from the same quarry can differ in colour, movement and the size of the flecks. The right way to buy granite is to go to the fabricator’s yard, look at the actual slabs, pick two that match for the seam, and have them tagged with your name. Fabricators who sell granite from a sample chip are selling you a surprise.

The dust question

Cutting quartz dry makes fine silica dust that has caused silicosis in fabrication workers, enough that Australia banned engineered stone in 2024 and Ontario’s Ministry of Labour has a standing alert on silica exposure in countertop shops. Granite has silica too, less of it. Neither is a hazard to you once installed. The practical point is to choose a fabricator with a wet shop and ventilation, which the good ones have and will show you, and to not let anyone cut either stone dry in your driveway on install day.

Which one, by household

Where homeowners go wrong

1. Choosing under showroom lights. Take the sample home. Look at it against the cabinet door in your kitchen at night. The $135 pattern and the $85 pattern often read the same under your lights.
2. Buying granite from a chip. Go to the yard. Tag the slabs.
3. A white quartz counter in a kitchen that fries. Light quartz shows every scorch. Dark quartz hides them and still cracks. If the stove runs hard, granite or quartzite.
4. Forgetting the seam. A plain or veined quartz shows it; a busy granite hides it. On a 14-foot run there will be one. Ask where before fabrication.
5. Comparing per-square-foot prices. One includes the sink cutout, edge and install; the other is the slab. Use the calculator to write one scope and have three fabricators price it.

The trade’s own fabrication and installation standards are published by the Natural Stone Institute, which is what a good Ontario shop works to for both materials.