Carpet installation in Bellingham, what it costs and how it should be done

What carpet costs in Bellingham right now

Installed carpet in Bellingham runs $3.85 to $8.80 per square foot. A whole-house job, meaning bedrooms, a hallway, stairs, and a family room, lands between $3,850 and $9,900. That number covers carpet, cushion, tack strip, seaming, power stretching, and labor together.

The low end is a light PET polyester in bedrooms with a clean subfloor and no stairs. The high end is a heavy solution-dyed nylon over 8 pound cushion, with a stair run and a floor plan that forces several seams.

Four things move the price more than square footage does:

• Fiber and face weight. Nylon costs more than polyester at the same weight, and heavier goods cost more per yard at the mill.
• Cushion. Going from a builder 5 pound pad to 8 pound rebond adds real money and is usually worth it.
• Stairs. A flight is priced on its own because it eats labor out of proportion to its area.
• Seam count and room shape. Broadloom comes 12 feet wide. A 13 foot room costs more per usable foot than a 11 foot room, every time.

Two costs are usually outside the per-foot number: subfloor damage nobody can see until the old carpet is up, and moisture work on a lower-level slab. Subfloor repair is priced at $5.50 to $13.20 per square foot and slab moisture mitigation at $880 to $2,750. Neither one shows up on most jobs. Both show up often enough in older Bellingham houses that you want to know how the bid handles them before you sign. Our full pricing detail sits on the carpet installation page.

Carpet and the related floor work it uncovers, Bellingham ranges

Fiber, face weight, cushion density, stair count, and the condition of the subfloor move the number far more than square footage does.

What Bellingham houses do to carpet

Bellingham gets roughly 35 inches of rain across about 140 wet days a year, and the wet stretch runs from the second week of October into late April. Rain itself is not the issue. What matters is what all that water does to the space under the floor, and what it does to the first six feet of carpet inside every exterior door.

Most pre-1980 housing here sits over a vented crawlspace. Washington's amended residential code, WAC 51-51-0408, calls for a ground cover of 6 mil black polyethylene over the dirt, joints lapped 6 inches, the sheet carried 6 inches up the stem wall, plus 1 square foot of net vent opening for every 300 square feet of under-floor area. That drops to 1 in 1,500 once an approved Class I vapor retarder is down. Plenty of crawlspaces in Columbia, Sehome, and the older parts of Fairhaven have plastic that is torn, short, or missing.

It matters because a damp crawlspace pushes moisture into the framing above it. Wood that sits above 20 percent moisture content long enough grows mold, and that smell moves through cushion and carpet within a season.

Look under the house before the carpet order goes in, not after.

Daylight basements and slabs are the other local pattern. A lot of 1970s through 1990s stock in Sudden Valley and up on Alabama Hill has a finished lower level poured on grade. Carpet over a slab needs a moisture reading before anyone picks a cushion. The test worth asking for is ASTM F2170, which reads relative humidity from probes set down inside the slab rather than sampling the surface, with three probe locations covering the first 1,000 square feet. A high number means a moisture-barrier cushion at minimum, and a mitigation coat first if it is bad enough. That is subfloor and moisture work, quoted on its own line.

One thing that is less of a factor than people assume: cold. Bellingham sits 66 feet above sea level on the bay, 21 miles south of the Canadian border, and winter lows hover near freezing rather than well below it. You do not get the hard freeze-thaw cycling that heaves slabs east of the mountains.

How to read a carpet bid

A bid should name the product. If the line reads "plush carpet, installed," there is nothing to compare. You want the mill, the style name, the fiber, and the face weight in ounces per square yard, with the cushion given as thickness and density.

Two bids on the same house can be thousands apart and both be honest. They can also be thousands apart because one of them quietly left out the stairs.

Line by line, here is what to check:

• Measurement basis. Mills sell by the square yard. Most local bids quote by the square foot. One square yard is 9 square feet. Convert before you compare, or you will compare a number to three times itself.
• Yardage and seam plan. Broadloom is 12 feet wide, occasionally 15. A good bid states the ordered yardage and where the seams land.
• Cushion spec. "8 pound rebond, 7/16 inch" is a spec. "Premium pad upgrade" is a sales line.
• Stairs. Called out on their own, per tread or per flight, with waterfall or cap-and-band stated so you know what you are getting.
• Demo and disposal. Old carpet and cushion out, staples pulled, everything hauled.
• Subfloor language. One sentence on what happens, and at what rate, if a soft sheet turns up under the old carpet.

Then check the company itself. Washington requires contractors to register with Labor and Industries, carry a surety bond, and hold liability coverage. As of the July 2024 increase the bond is $30,000 for a general contractor and $15,000 for a specialty contractor, and the insurance floor is $200,000 public liability with $50,000 property damage, or a $250,000 combined single limit. L&I's Verify a Contractor tool shows registration status, bond, and any judgments in about a minute. Run every bidder through it, ours included.

One more habit worth having: ask who is actually installing. Plenty of flooring gets sold by one company and installed by a subcontracted crew, which is fine as long as everyone in the chain is registered and insured. Ask for the crew's name and check that too.

Fiber, face weight, and the cushion nobody asks about

Fiber sets both the price and how the carpet looks in year seven.

• Nylon is the most resilient of the common synthetics. It recovers from crushing, holds texture in traffic lanes, and costs the most. Solution-dyed nylon carries color inside the fiber rather than on it, so sun and bleach have much less to pull out.
• PET polyester is hydrophobic, so it shrugs off spills better than untreated nylon. It crushes sooner in a hallway. In bedrooms it is a good buy at the price.
• Triexta, sold as SmartStrand, builds stain protection into the polymer instead of applying it to the surface. It behaves like a tougher polyester.
• Olefin is inexpensive and highly stain resistant, and it mats down under traffic. Keep it in loop or Berber constructions in low-use rooms.
• Wool is the outlier: costly, naturally resilient, and a personal call rather than a value call.

Face weight is the ounces of fiber in one square yard. Higher usually means more carpet, and by itself it tells you very little. Density is the useful figure: face weight times 36, divided by pile height in inches. Above 2,900 holds up in a normal house. A heavy carpet with a tall pile can be less dense than a lighter one cut short, which is exactly how a plush that felt expensive in the showroom ends up flat in the hall.

Twist level is worth touching with your hand. Tight, well-defined yarn tips resist untwisting, and untwisting is what makes a traffic lane look shaded and tired long before the fiber is actually worn out.

The cushion

Cushion is where a carpet job gets quietly cheaper without the invoice changing. CRI 105, the residential installation standard, caps separate cushion at 7/16 inch for a stretch-in install and 3/8 inch under double glue-down. Anything thicker feels better underfoot in the store and flexes the carpet's secondary backing every time you cross the room, which breaks down the latex and opens seams.

Buy density, not thickness. Six pounds per cubic foot is the practical minimum for living space. Eight pound belongs in hallways, family rooms, and on stairs, where cushion takes the worst of it. Over any slab, and over any crawlspace you are not fully confident in, use a moisture-barrier cushion.

Two cases break the general rule. A Berber or low-profile loop wants a firmer, thinner cushion than a thick plush does, because soft padding under a stiff loop backing works the loops loose. And any room where a wheelchair, a walker, or a desk chair rolls daily wants the firmest cushion you can live with, since soft cushion makes rolling harder and wears a visible track.

How the install actually runs

From signed order to installed carpet is usually two to three weeks, and most of that wait is the mill, not the schedule.

On install day the sequence goes like this:

1. Acclimation. CRI 105 asks that carpet and materials sit in the space at least 24 hours at 65 to 95 degrees with relative humidity no higher than 65 percent. In a Bellingham January that means leaving the heat on in an empty house, not turning it down to save fuel.
2. Furniture and demo. Old carpet and cushion out, staples pulled, existing tack strip inspected rather than assumed good.
3. The subfloor look. This is the only moment anyone will see your plywood. Squeaks get screwed to the joist, panel seams get checked, soft spots get called out before new material goes down.
4. Tack strip. The gully, the gap between strip and wall, has to be slightly less than the carpet thickness and never more than 3/8 inch. Too wide and the edge will not hold.
5. Cushion. Stapled over wood, glued over concrete, butted rather than overlapped, and taped at every joint.
6. Seams. Every trimmed edge gets seam sealer. CRI 105 requires it. It is the most commonly skipped step on a cheap install and the reason seams come open in year two.
7. Stretch. Power stretcher, minimum 1 percent in both length and width. A knee kicker holds carpet between stretcher bites and cannot do the stretching itself.
8. Trim, transitions, vacuum. Metal or wood transitions at every doorway, carpet trimmed into the gully, and a first vacuum before the crew leaves.

Time on site is short. A single bedroom is 2 to 3 hours. A whole house is 1 to 2 days. A flight of stairs alone is 3 to 5 hours, which is why stairs never belong buried in a per-foot average.

Where carpet jobs go wrong here

Wrinkles in the first year. This is the failure you are most likely to see. Carpet that was kicked in rather than power stretched relaxes as it settles, and by the next winter there are ridges across the hall. A restretch fixes it if the carpet is otherwise sound, and it costs money and furniture moving that stretching correctly the first time would not have.

Open or peaked seams. Unsealed cut edges ravel. Once a seam opens you can see backing through it, and the repair means cutting in a patch from leftover material, which assumes leftover material exists. Keep your offcuts.

Delaminated backing. Cushion that is too thick or too soft flexes the secondary backing until the latex bond gives up. It feels like the carpet has come loose from itself, because it has.

Dark lines along the baseboards. Filtration soiling, and it is very common in this climate. Air moving through the edge of the carpet drops fine soil at every gap, worst along exterior walls and stair nosings. Sealing the perimeter and reducing air leakage helps. Regular cleaning does not lift it well once it has set.

Musty carpet over a wet crawlspace. The carpet is the symptom, and replacing it does nothing. Ground cover, drainage, and ventilation are the actual fix. Doing that work after new carpet is down means pulling new carpet. Moisture mitigation runs $880 to $2,750, and subfloor repair runs $5.50 to $13.20 per square foot when framing or sheathing has to come out.

Rotten sheathing found at demo. It turns up around toilets, inside exterior doors, and along the wall under a window that leaked before you owned the house. Localized damage is a floor repair at $330 to $1,650 per project. Anything wider gets priced by the square foot.

When to do it yourself and when not to

Pulling out old carpet is a genuinely good homeowner job. It is dirty, it takes an afternoon, and it takes a line off the bid. Cut it into three foot strips, roll and tape them, pull the staples out of the subfloor, and leave the tack strip in place unless it is rusted or you are moving to a hard surface.

Installing is a different trade. You can rent a power stretcher at any tool counter in Whatcom County. What does not come with the rental is knowing how much stretch a given backing wants, where to start in an L-shaped room, and how to cut a seam so the pile runs the same direction on both sides and the seam does not read from the doorway. Most fiber warranties are written against CRI 105 installation, so a self-install can leave you holding a product claim with no qualifying installation behind it.

Stairs are the hardest carpet work there is. Skip them.

The practical split: do the demo, hire the install. A small square closet with no seam and no stair is a fair experiment. A room with a seam, a stair, or a slab under it is not.

What you do after the crew leaves

New carpet sheds for a few weeks. That is loose fiber left from shearing at the mill, not the carpet coming apart. Vacuum it and it stops.

Set your vacuum height so the beater bar just brushes the pile. Set too low, it tears the yarn tips and builds traffic lanes early.

Most fiber warranties require professional hot water extraction every 12 to 18 months and require you to keep the receipts. More homeowners lose a warranty claim on missing paperwork than on the product itself. Put the receipts, the spec sheet, and a labeled offcut together in the garage.

The highest-value habit in this climate is a real walk-off mat at every exterior door, inside and out. From October through April the ground here is wet most weeks, and the grit riding in on shoes is what abrades fiber. Three feet of mat catches the bulk of it.

Open a window for a day or two after install if the smell bothers you.

Expect 8 to 12 years in hallways and family rooms and 12 to 15 in bedrooms. If the carpet still looks acceptable but feels dead underfoot, the cushion has failed before the carpet has, and cushion can be replaced by itself. If a hallway keeps wearing out, compare against hard surface instead: LVP and laminate run $4.40 to $11 and $3.85 to $7.15 per square foot installed, and both outlast carpet in a traffic lane.