Basement Carpet Cost 2026: $2.19 to $9.54 Per Sq Ft Installed
Carpeting a basement costs $2.19 to $9.54 per sq ft installed on a pad sold for concrete or damp areas: $870 to $3,820 for 400 sq ft, $1,750 to $7,630 for 800 sq ft and $2,620 to $11,450 for 1,200 sq ft. That is our arithmetic on retail carpet and pad prices, plus labor from Home Depot's published $0.69 basic rate up to our $1.60 estimate, all checked 13 October 2026; the sources are listed at the foot of the page.
Olefin (polypropylene) carpet is the low end at $2.19 to $5.36 per sq ft; nylon or triexta runs $3.56 to $9.54. The basement-specific extras (a moisture test, concrete tack strip, patching dips in the slab, a dehumidifier) are priced one by one below.
Retail prices checked 13 October 2026; installed figures exclude removal, furniture moving, moisture testing and leveling.
Basement carpet cost by size
Installed cost for carpet, a basement pad and labor, by floor area. These are basement figures: the 1,000 sq ft carpet cost page prices upstairs grades on ordinary rebond pad, so its totals differ from the 1,000 sq ft row here.
| Floor area | Olefin | Nylon or triexta |
|---|---|---|
| 400 sq ft | $870 to $2,140 | $1,420 to $3,820 |
| 600 sq ft | $1,310 to $3,220 | $2,140 to $5,730 |
| 800 sq ft | $1,750 to $4,290 | $2,850 to $7,630 |
| 1,000 sq ft | $2,190 to $5,360 | $3,560 to $9,540 |
| 1,200 sq ft | $2,620 to $6,430 | $4,270 to $11,450 |
How we worked it out: carpet at the lowest and highest listing we found (olefin $0.99 to $2.09; nylon or triexta $2.24 to $5.89 per sq ft), plus a basement pad from $0.37 to $1.33 per sq ft, both times 1.10 for cutting waste, plus labor from $0.69 (Home Depot's published basic rate) to $1.60 per sq ft (our estimate). Low ends are added together and high ends together, then rounded to the nearest ten dollars. No retailer publishes a separate basement labor rate, so the same labor range is used as upstairs; ask whether your quote includes gluing the pad to the slab and concrete tack strip.
Line items a basement adds
Apart from the pad, none of these are in the totals above. Every slab install needs the pad and the tack strip; each card says when you need the rest.
$39.00 for a 3-canister Vaprecision kit; $45.70 for Gilson's 3-kit pack. Each dish is weighed before and after, so add a 0.1 g scale ($160.90 from Gilson) or KTA's paid lab weighing. Gilson gives a 60 to 72 hour test cycle and recommends three for the first 500 sq ft and one for each additional 500 sq ft.
When you need it: Before glue-down or free-floating carpet tile (CRI 105 requires a written report), or before stretch-in on a slab with a damp history.
A Wagner Rapid RH L6 starter kit with five sensors and a reader: a contractor's tool. We found no published price for hiring a tester.
When you need it: When the carpet maker asks for RH; Shaw “recognizes RH as the qualifying standard.”
The three pads in the padding table below, against $0.34 to $0.51 for the 8 lb rebond in our upstairs prices.
When you need it: Every basement install. Already in the size table.
Halex 1 in. strip for concrete, pre-nailed, $39.97 for 100 four-foot strips (the wood-subfloor version was the same price). Nailless peel-and-stick strip: $0.50/linear ft.
When you need it: Every stretch-in install on a slab. A 20 x 30 ft room has 100 ft of wall.
Material only: Custom LevelQuik RS $37.97 for 50 lb (40 sq ft at 1/8 in.); Henry 555 $39.97 for 40 lb (43 sq ft). Primer and labor extra.
When you need it: Only over dips, cracks or ridges that would show through the pad (CRI 105 and Shaw both require them repaired).
Lowest and highest 50-pint unit on Home Depot's first results page.
When you need it: If the basement cannot be held at 65 percent relative humidity or lower, the limit in CRI 105 and Shaw’s guide.
Prices are the selling prices shown on 13 October 2026; retailers say local prices vary.
Why basement carpet is its own spec
A basement floor is a concrete slab, and slabs give off moisture. ASTM's own summary of its calcium chloride test says “All concrete subfloors emit some amount of moisture in vapor form” (ASTM F1869-23), and the Carpet and Rug Institute's residential installation standard warns that any concrete floor, “even when adequately cured and dry, can allow moisture vapor to pass through to its surface” (CRI 105). Carpet that would sit on dry plywood upstairs sits on a surface that can pass moisture in a basement.
So the spec changes in three places, decided together. The pad should be one sold for concrete or damp areas, glued to the slab. The fiber should be one that copes with damp: olefin, nylon or triexta, not wool. And the room has to be dry enough to carpet: CRI 105 says installation should not begin until the HVAC is running and the room is held at 65 to 95°F with “a maximum relative humidity of 65%” for at least 48 hours before, during and 72 hours after the install. Shaw's stretch-in guide sets the same 65 percent ceiling and wants it held “permanently after installation.”
Do you need a moisture test?
For the usual basement job, stretch-in carpet over a pad, the industry standard says probably not. CRI 105: “Most residential stretch-in installations do not require moisture testing.” It does require a written report on the slab's moisture and alkalinity before glue-down, double glue-down and free-floating carpet tile, and it leaves the pass mark to the maker: tests are run “not to exceed manufacturer's requirements.”
The pass marks are in the makers' guides, and they differ. Shaw's stretch-in guide labels its testing “for commercial applications” and gives two limits: in-slab relative humidity “below 85% (ASTM F-2170)”, or a calcium chloride result that does “not exceed 5.0 lbs. per 1000 SF per 24 hours (ASTM F-1869 test).” Shaw “recognizes RH as the qualifying standard” and says “Do not begin the installation if an unacceptable moisture level is detected.” Mohawk's Aladdin Commercial glue-down guide (2017) is stricter on RH: 5 lbs or 80 percent, and “do not proceed” above either. ASTM's summary pages for the two methods set no pass mark at all: F1869 measures the pounds of moisture vapor given off by 1,000 sq ft of slab in 24 hours, and F2170 measures percent relative humidity inside the slab with probes, noting that flooring makers “generally require moisture testing to be performed before installation on concrete.”
Our advice: if the basement has ever been wet or smelled musty, run the calcium chloride test before you buy carpet. The kits cost $39.00 to $45.70 for three tests (plus a scale), against $1,750 to $7,630 for the carpet in an 800 sq ft basement. If no installer you talk to raises moisture at all, ask them which limit their carpet maker sets.
Padding selection
CRI 105 and Shaw both cap residential cushion at 7/16 in. thick, and Shaw asks for at least 6 lb density. Shaw also says carpet cushion “should be glued to concrete flooring with use of a good quality cushion adhesive.” These are the pads Home Depot sold for concrete or basements on 13 October 2026, in each maker's own words:
| Pad, and what its listing says | $/sq ft |
|---|---|
| TrafficMaster 5/16 in. 8 lb. Density Rebond Carpet Pad with Moisture Barrier “Ideal for using over concrete, vinyl, tile, and wood subfloors”; its barrier “prevents spills from soaking through pad and your subfloor” | $0.37 |
| Lifeproof 7/16 in. Waterproof Premium Plus Carpet Cushion with Air Channels “Built-in air channels keep your subfloor dry and carpets fresh” | $0.98 |
| DMX 1-Step 0.281 in. 8 lb. closed-cell foam carpet pad “Designed for areas where moisture and humidity is a problem (basements or humid climates)”; dimpled so air circulates under it | $1.33 |
| 8 lb rebond (for comparison) The pad in our upstairs prices | $0.34 to $0.51 |
“Moisture barrier” on a pad label usually means a film that stops spills soaking down from the carpet, as the TrafficMaster listing says. It is not sold as a barrier against vapor coming up from the slab, and no pad listing we read claims to fix a slab that fails a moisture test. The pads that address the slab side do it with air channels (Lifeproof) or a dimpled underside that lets air move (DMX). Home Depot's cost guide gives $1.01 per sq ft as its average padding price.
Fiber selection
Olefin (polypropylene) is the budget basement fiber. Home Depot's carpet cost guide says “Olefin fibers battle against the buildup of mold and mildew, which makes this feature ideal for high-moisture areas of your home.” The olefin carpet we found ran $0.99 to $2.09 per sq ft (Home Depot TrafficMaster Viking, 11.5 oz olefin loop to Home Depot TrafficMaster Fallbrook, 19 oz olefin berber), $2.19 to $5.36 installed on a basement pad.
Nylon or triexta is the step up for a basement that is used as a family room: $2.24 to $5.89 per sq ft for the carpet (Lowe's STAINMASTER PetProtect Furrever Yours, 35.1 oz (sale price; regular $4.48) at the low end, Home Depot Lifeproof with Petproof Lurelin, 68 oz at the top), $3.56 to $9.54 installed. Whichever synthetic you choose, keep the room at or under the 65 percent humidity limit above.
Wool is the one we would not put in a basement. The Woolmark Company says wool “can absorb up to 35% of its weight before feeling wet”. Upstairs that makes wool comfortable; in a room that runs damp it means carpet that holds moisture. It is also the most expensive fiber, at $3.24 to $11.44 per sq ft for the carpet alone.
Concrete prep and installation method
Tack strip. CRI 105 and Shaw both require strips at least 1 in. wide and 1/4 in. thick, fastened with at least two fasteners per piece. On concrete, Shaw says strips “can be nailed in if there is no danger of puncturing the pipes”, and “If the concrete will not hold nails or if there is a possibility of puncturing the pipes, then the strips can be glued down.” On radiant-heated floors, both say to use adhesive, not nails or screws. Strips made for concrete come pre-nailed: the Halex strip is sold “for Concrete Subfloors” at $0.10 per linear ft, the same price as its wood-subfloor version. The nailless peel-and-stick strip is $0.50 per linear ft and 7/8 in. wide, narrower than the 1 in. minimum in CRI 105 and Shaw's guide, so ask your installer whether the carpet maker accepts it.
Flatness. CRI 105 requires cracks, holes and irregularities to be repaired “to ensure a flat, smooth substrate, prevent accelerated wear and telegraphing substrate irregularities.” Shaw says to fill depressions or cracks with a cementitious patching or leveling compound. Self-leveling underlayment costs $0.93 to $0.95 per sq ft in material at 1/8 in. thick (twice that at 1/4 in.), and it is usually only needed over the low spots, not the whole floor.
Pad and stretching. The pad is glued to the slab rather than stapled, and the carpet is power-stretched onto the strips like any stretch-in install. Shaw says areas over 30 ft long or wide “are difficult to obtain sufficient stretch and can potentially wrinkle”, which matters in long open basements. For slab prep beyond the basement, including glue-down and double-stick methods, see carpet over concrete.
Sump pump and flood planning
If the basement has a sump pump, plan the layout so the pit lid stays reachable without lifting wall-to-wall carpet: stop the carpet short of the pit with a transition strip and a hard-surface or removable panel around the lid. Decide this with the installer before the carpet is cut. If the basement has flooded before, deal with the water source first; no pad or fiber choice makes carpet survive standing water.