Tile and Grout Cleaning Cost Calculator

You are not paying to clean the tile

Glazed ceramic and porcelain are effectively inert. They are fired glass over fired clay, nothing soaks into them, and a damp cloth takes almost anything off. If your floor looks bad, the tile is not what you are looking at.

The grout is. Cement grout is porous — a network of fine capillaries that takes up water, grease, soap and dye and holds them. It is a few percent of the floor's area and effectively all of its dirt.

That changes how to read the price. The cost of this job is almost entirely the labor of working every grout line: a spinner tool at walking pace, hand work along the edges and in the corners, a second pass where it is bad. It is about 167 square feet an hour, which is a quarter the rate of carpet cleaning, and that rate is the whole reason tile costs three times as much per foot.

Your mop is how it got like this

This is the part worth changing regardless of whether you hire anybody.

A string or sponge mop lifts soil off the tile into the water, and then pushes that water into the grout lines, which are lower than the tile and absorbent. Every pass deposits a little more. The tile ends up clean and the grout ends up holding everything the tile used to.

What to do instead:

• Microfiber flat mop, not a string mop. It traps soil rather than suspending it.
• Change the water when it stops being clear. One bucket of dirty water undoes the whole job.
• A neutral pH cleaner, and not much of it. Soap residue is itself a soil magnet, which is why floors often look worse a day after mopping than an hour after.
• Vacuum first, properly, including the grout lines. Grit ground into grout by foot traffic is most of what darkens it.

None of that reverses existing damage, but it is the difference between a professional clean lasting four years and lasting one.

Sealing is the part that changes the outcome

Cleaning gets grout back to its original color. Sealing is what stops it going straight back, and it is the decision that matters on this page.

A penetrating sealer soaks into the capillaries and lines them, so spills sit on the surface long enough to be wiped instead of wicking in. It does not change how the grout looks and it does not make it waterproof — it buys you time and makes routine cleaning actually work.

It nearly doubles the job, and the reason is labor rather than material. The sealer itself is about $65 a gallon covering 220 square feet. What costs is that the floor has to be completely dry first, then every grout line is worked by hand, then the excess is wiped off the tile before it hazes — a window of a few minutes, across the whole floor, or you are left with a dull film that has to be stripped.

Expect it to last two to five years on a floor, less in a shower. Reseal when water stops beading in the grout line.

On a floor you have just paid to have cleaned, skipping the sealer is usually a false economy: you will be paying the $230 again in a year.

When cleaning is the wrong answer

An honest company tells you this before quoting. There are three cases where no amount of cleaning will fix the floor:

• Cracked, crumbling or missing grout. Cleaning will make it worse by removing what is loose. This is regrouting — the old grout is raked out and new grout goes in.
• Grout stained by absorption rather than deposit. Red wine, rust, some dyes and long-standing mildew can be in the cement rather than on it. It may lighten and it will not clear.
• Efflorescence — the white crusty deposit from mineral salts migrating up through the grout. That is a moisture problem under the floor, and cleaning it off without fixing the water means it comes back.

For the first two there is a middle option worth knowing: color sealing. An opaque pigmented sealer that coats the grout rather than soaking into it, so it both recolors and seals in one pass. It runs roughly $1 to $3 a square foot, it makes grout uniform in a way cleaning cannot, and it lets you change the color — which is how people get from builder-gray grout to charcoal without regrouting. The trade-off is that it is a coating, so it can wear in traffic lanes and needs touching up rather than simply resealing.

Natural stone is a different chemistry problem

If your floor is marble, travertine, limestone or slate, this section matters more than the price.

Acid etches calcium-based stone permanently. Not stains it — dissolves the surface, leaving a dull mark that no cleaning removes and that only refinishing fixes. So:

• Never use vinegar on stone, whatever a cleaning blog says. Same for lemon juice, most bathroom descalers, and anything sold for removing limescale.
• Never use an acid rinse, which is standard on ceramic grout work. A company that does not ask what your floor is before quoting is a company that may be about to etch it.
• Avoid strong alkalines too on a polished finish, which they dull.

Stone work moves to neutral chemistry that works more slowly, so more mechanical effort compensates — which is the 30% on the calculator above. The stone itself usually wants sealing as well as the grout, since stone is porous in a way glazed tile is not.

If you are not certain what you have, ask the company to test an inconspicuous edge before they start. Glazed ceramic will shrug; stone will not.

What you are paying for

For 300 sq ft of ceramic tile, cleaned but not sealed, at $230:

Labor and the trip are nearly everything, which is why a 100 square foot bathroom costs $140 — not a third of the 300 square foot job but two thirds of it. Minimums are $100 to $150 across the trade and exist for the same reason.

If you have a kitchen and two bathrooms, do them on one visit.

Doing it yourself

Possible, genuinely unpleasant, and the results are worse for one specific reason: you cannot recover the dirty solution. A professional spinner sprays and vacuums in the same pass, so the soil leaves the floor. On your knees with a brush, the soil goes back into the grout with the rinse water.

If you are going to:

• A rotary brush on a drill saves your shoulders and does more than a hand brush.
• Oxygen bleach — sodium percarbonate, left to dwell — is more effective and far kinder to grout than chlorine bleach.
• Avoid chlorine bleach. It degrades cement grout over time, can bleach colored grout unevenly, and does nothing for grease.
• Rinse more than you think, with clean water, changing it constantly.
• Then seal it, or the afternoon was for nothing.

Expect it to take a day for a kitchen, and expect a professional result to be noticeably better.

Timing

• Walkable: an hour or two after cleaning.
• Sealing needs a dry floor, so it is usually a few hours after the clean, or a second visit the next day on a large or humid job.
• Cured sealer: around 24 hours before heavy traffic or washing, depending on the product.

Questions worth asking

• What is the price per square foot, and is sealing included or extra?
• What is my floor? Ask them to confirm ceramic against stone before quoting.
• Will you use an acid rinse? On stone the answer must be no.
• Is there grout that will not come clean? Get the walk-through before the work.
• Is any grout cracked or missing, and is regrouting needed first?
• Penetrating sealer or color seal, and how long should it last?
• How long before I can walk on it, and before it can be washed?
• Do you do shower walls, and at what rate? They are slower than floors.
• Is there a minimum, and does this job meet it?