Foundation Repair in Tacoma, WA
Tacoma Foundation Pros provides foundation repair in Tacoma, WA.
Cracked or settling foundations, sagging crawl space floors, wet crawl spaces and earthquake retrofits in Tacoma and nearby towns, passed to local providers. The median Tacoma home was built in 1967 (ACS 2024 5-year), and November is the wettest month at Sea-Tac with 6.31 inches of rain in a normal year (NOAA, 1991-2020).
Our Services in Tacoma, WA
Foundation Repair in Tacoma
Fixr puts most foundation repairs between $2,200 and $8,200, about $5,200 on average (January 2026), and This Old House lists a similar national range (October 2026). In Tacoma the median home was built in 1967 and about 43% of homes predate 1960 (ACS 2024 5-year), so many foundations are old concrete or block that has been through decades of wet winters. The right repair depends on whether the problem is settlement, water, framing or a wall moving.
Foundation Repair Details
Foundation Crack Repair in Tacoma
Fixr puts epoxy or polyurethane injection at $250 to $1,000 per crack (February 2026). Narrow vertical cracks from concrete shrinkage are common and often only need sealing if they leak. Wide cracks, cracks that are wider at one end, horizontal cracks and cracks with one side offset from the other point to movement and call for a structural look first.
Foundation Crack Repair Details
Settled Foundation & Piers in Tacoma
Fixr and This Old House both put foundation piers at $1,000 to $3,000 each (2026). Push piers are driven hydraulically using the weight of the house as resistance; helical piers are screwed into the soil and also suit lighter structures such as porches and additions. The number of piers follows the length of footing that has settled.
Settled Foundation & Piers Details
Helical Piers in Tacoma
Helical piers fall in the same $1,000 to $3,000 per pier range Fixr gives for foundation piers (January 2026). Each pier has helix plates that are screwed into the ground until the torque shows it has reached soil that can carry the load. Because they do not rely on the house's weight, they also work for lighter structures and for new additions.
Helical Piers Details
Crawl Space & Sagging Floor Repair in Tacoma
Angi puts the average for adding a support post at about $2,500 and lists joist repair at $4,000 to $12,000 (2026); HomeGuide prices sistering at $150 to $325 per joist and a supplemental beam with posts at $1,000 to $5,000. Sagging floors over a crawl space usually come from posts set on poor footings, undersized beams, or wood weakened by moisture.
Crawl Space & Sagging Floor Repair Details
Crawl Space Encapsulation in Tacoma
This Old House puts crawl space encapsulation at about $5,500 on average, typically $1,500 to $15,000 (March 2026). With November through January the wettest months at Sea-Tac (NOAA 1991-2020), crawl spaces in older homes can stay damp for much of the winter. Encapsulation keeps ground moisture and humid air away from the floor framing.
Crawl Space Encapsulation Details
Crawl Space Drainage in Tacoma
Fixr lists interior perimeter drains at $40 to $120 per linear foot and a new sump pump and pit at $800 to $2,000 (2025-2026). Water that seeps through the stem wall or rises through the soil during long rainy spells is collected in a drain along the inside of the foundation and pumped out.
Crawl Space Drainage Details
Earthquake Retrofit in Tacoma
HomeGuide puts a whole-house earthquake retrofit at $3,000 to $10,000 (2026), Angi gives a national average of $6,082, and Fixr lists foundation bolting at $1,000 to $5,000. The PNSN describes the 2001 Nisqually earthquake as a magnitude 6.8 event centered beneath Anderson Island and felt across the Puget Sound region. A retrofit targets the weak link in many older wood houses: the connection between the framing and the foundation.
Earthquake Retrofit Details
Foundation Bolting in Tacoma
Fixr and HomeGuide put foundation bolting at $1,000 to $5,000, and Angi estimates $1,500 to $2,250 for a typical bolting job based on the house perimeter and number of bolts. Bolts are drilled through the sill plate into the concrete and set with epoxy or expansion anchors, usually every four to six feet.
Foundation Bolting Details
Basement Waterproofing in Tacoma
Fixr puts most basement waterproofing jobs between $3,000 and $10,000, about $5,000 on average (February 2026). Houses on Tacoma's hills often have partial basements cut into the slope, where the uphill wall takes the most water during the winter rains. The method should follow from where the water enters.
Basement Waterproofing Details
Sump Pump Installation in Tacoma
Fixr puts a new sump pump installation at about $1,400 on average, typically $800 to $2,000 (January 2025). In crawl spaces the pit sits at the lowest point of a perimeter drain; in basements it is usually in a corner. The discharge should carry water well away from the foundation.
Sump Pump Installation Details
French Drains & Curtain Drains in Tacoma
Fixr puts French drains at $10 to $100 per linear foot (2026). On sloped Tacoma lots, a curtain drain dug across the slope uphill of the house catches water moving through the soil. The outlet has to be lower than the drain, which can mean a long run to daylight or a pump.
French Drains & Curtain Drains Details
Downspouts, Grading & Yard Drainage in Tacoma
Fixr lists soil regrading at $500 to $3,000 and gutters and downspouts at $3 to $30 per linear foot (February 2026). Each inch of rain on 1,000 square feet of roof sheds about 623 gallons; with 39.34 inches in a normal year at Sea-Tac (NOAA 1991-2020), a typical roof sheds tens of thousands of gallons a year.
Downspouts, Grading & Yard Drainage Details
Retaining Wall Repair in Tacoma
Retaining walls on sloped lots hold back soil that gets heavier when wet. Walls without drainage behind them tend to lean or bulge after wet winters. Repair can mean adding drainage, tiebacks, rebuilding a section, or replacing the wall; costs depend heavily on height, length and access, so ask for itemized quotes.
Retaining Wall Repair Details
Slab & Concrete Leveling in Tacoma
Fixr lists concrete leveling as a lower-cost alternative to replacement for sunken slabs. Small holes are drilled in the slab, and polyurethane foam or cement grout is pumped beneath it to fill voids and raise it. Settled steps and walkways near the house also tend to direct water toward the foundation.
Slab & Concrete Leveling Details
Bowing Wall Repair in Tacoma
This Old House puts reinforcement strips for a bowed wall at $4,000 to $12,000 for 12 strips (October 2026). Partial basements cut into a slope are the most exposed, because the uphill wall holds back wet soil. Options include carbon fiber straps, steel beams and wall anchors.
Bowing Wall Repair Details
Foundation Inspection in Tacoma
HomeGuide puts a structural engineer's assessment at about $300 to $800 (2026). A provider's free inspection is a sales visit as well as a diagnosis; for large or disputed repairs, an independent engineer's report can be worth the cost. Either way, ask for floor level readings, photos and a written explanation of the cause.
Foundation Inspection Details
Foundation Replacement in Tacoma
Fixr puts structural repairs up to about $25,000 and full foundation replacement well above that, because the house has to be lifted, the old foundation removed and a new one poured. It is considered when old concrete is crumbling, when a foundation is too damaged to brace, or during major remodels.
Foundation Replacement Details
Crawl Space Vapor Barrier in Tacoma
Fixr lists vapor barriers at about $1,500 to $4,000 (February 2026), less than full encapsulation. A heavy plastic sheet over the soil, overlapped and taped, keeps ground moisture away from floor framing and insulation. It is often the first step in a damp crawl space.
Crawl Space Vapor Barrier Details
Crawl Space Moisture & Mold in Tacoma
Fixr puts mold remediation at about $500 to $6,000 depending on area (February 2026). EPA recommends keeping indoor humidity below 60 percent, ideally 30 to 50 percent. In a crawl space, mold on joists usually means moisture that has to be fixed first, through drainage, a vapor barrier or encapsulation.
Crawl Space Moisture & Mold Details
Porch, Steps & Addition Settling in Tacoma
Porches and additions often sit on shallower footings than the main house and settle on their own, leaving gaps or cracks where they meet. Helical piers fall in Fixr's $1,000 to $3,000 per pier range and suit these lighter structures. The fix depends on whether the footing, the framing or the drainage is the cause.
Porch, Steps & Addition Settling DetailsFrequently Asked Questions
How much does foundation repair cost in Tacoma?
National cost guides put most repairs between $2,200 and $8,200, about $5,200 on average (Fixr, January 2026), with piers at $1,000 to $3,000 each. No guide publishes Tacoma-only prices; a local provider prices the job after an inspection.
How much does an earthquake retrofit cost?
HomeGuide lists $3,000 to $10,000 for a whole-house retrofit (2026) and Angi a national average of $6,082. Bolting alone runs about $1,000 to $5,000 and cripple wall bracing about $1,000 to $3,000.
My floors are bouncy and sloping. Is that the foundation?
Often it is the crawl space framing instead: posts on poor footings, undersized beams or joists weakened by moisture. Angi puts an added support post at about $2,500 on average. A floor level survey and a crawl space check tell the two apart.
Are foundation cracks normal?
Narrow vertical shrinkage cracks are common in concrete. Wide cracks, cracks wider at one end, horizontal cracks and offset cracks suggest movement and deserve an inspection. Mark the ends with a date to see whether they grow.
Does Tacoma's rain affect foundations?
Wet soil softens and moves more, and water pressure builds against walls. Sea-Tac averages 39.34 inches of precipitation a year, mostly from October to March (NOAA 1991-2020). Gutters, downspouts and grading are the first line of defense.
What is the difference between helical and push piers?
Push piers are driven using the weight of the house; helical piers are screwed in and can carry lighter structures like porches and additions. Both fall around $1,000 to $3,000 per pier in national guides.
Should I encapsulate my crawl space?
If the crawl space is damp, smells musty or has mold on framing, sealing it can help. This Old House puts encapsulation at about $5,500 on average. Fix standing water first, or the liner traps it.
Do I need a permit for foundation work?
Piers, foundation replacement, earthquake retrofits and many structural repairs usually need a permit; simple crack injection often does not. Rules differ between Tacoma and each nearby city, so ask the provider who files it.
Should I get a structural engineer?
For large or uncertain repairs, an independent engineer's report can be worth it; HomeGuide puts an assessment at about $300 to $800. It gives a second view before you commit to piers or beam replacement.
Does homeowner's insurance cover foundation repair?
Standard policies usually exclude settlement and earth movement; earthquake damage needs separate earthquake coverage. Check your policy and keep records of any retrofit.
What areas does this site cover?
Tacoma, Lakewood, University Place, Puyallup, Federal Way, Gig Harbor, Fife, Fircrest and Steilacoom, plus Milton, Edgewood, Sumner, Bonney Lake, Ruston and DuPont. Availability is confirmed when a provider contacts you.
What should a written foundation quote include?
The cause found, floor level readings, the method, the number and location of piers, posts or anchor bolts, permits and who files them, cleanup, and the written workmanship and manufacturer warranties.
How It Works
- 1
Describe What You See
Cracks in the foundation or drywall, doors that stick, a bouncy or sloping floor, water in the crawl space, or a home that has never been bolted to its foundation.
- 2
Inspection Under the House
A local provider checks the foundation walls and footings, the crawl space framing, moisture and drainage, and measures how level the floors are.
- 3
Written, Itemized Quote
Ask for the cause found, the method, the number of piers, posts or anchor bolts, permit status, and the warranty, each listed separately.
- 4
Work and Documentation
Ask for before-and-after floor level readings, photos of anything covered up, and the permit sign-off when one is required.
Why Choose Tacoma Foundation Pros
- ✓ Free, no-obligation request. Your request goes to a local foundation, crawl space or drainage provider who calls you back.
- ✓ Cause before cure. Ask for floor level readings and a crawl space check before agreeing to piers.
- ✓ Water is part of the fix. Gutters, grading and drainage often matter as much as the repair itself.
- ✓ Itemized quote in writing. Piers, posts, bolts, permits and warranty should each be listed.
- ✓ Sources you can check. Cost figures and local facts link to the guide or agency they come from.
Typical Pricing
| Foundation repair, typical jobNational average $5,200 (Fixr, Jan 2026). | $2,200 – $8,200 |
| Foundation piersPush or helical piers (Fixr and This Old House, 2026). | $1,000 – $3,000 / pier |
| Crack injectionEpoxy or polyurethane (Fixr, Feb 2026). | $250 – $1,000 / crack |
| Earthquake retrofit, whole houseBolting and bracing (HomeGuide, 2026); Angi national average $6,082. | $3,000 – $10,000 |
| Foundation boltingAnchor bolts along the sill (Fixr and HomeGuide). | $1,000 – $5,000 |
| Sagging floor, added postAverage for a support post (Angi, 2026); sistering a joist $150 – $325 each (HomeGuide). | about $2,500 |
| Crawl space encapsulationAverage about $5,500 (This Old House, Mar 2026). | $1,500 – $15,000 |
| Sump pump with new pitNational average $1,400 (Fixr, 2025). | $800 – $2,000 |
Indicative ranges, not a quote. The final price comes in writing from the builder after seeing your site, and depends on its size, materials and access.
Sources: Fixr, foundation repair cost (updated Jan 27, 2026) · This Old House, foundation repair cost (Oct 2026) · HomeGuide, earthquake retrofit cost (2026) · Angi, earthquake retrofit cost (2026) · Fixr, earthquake retrofit cost · HomeGuide, sagging floor repair cost (2026) · Angi, sagging floor repair cost (2026) · This Old House, crawl space encapsulation cost (Mar 2026) · Fixr, basement waterproofing cost (Feb 2026) · Fixr, sump pump installation cost (Jan 2025)
Ballpark Cost Calculator
Pick a project type and enter your linear feet for a rough estimate — this is a starting point, not a quote.
Based on the same price ranges shown above. Final pricing is confirmed in writing after a free on-site estimate.
Why Tacoma Homeowners Call About Their Foundation
Winter Rain
November, December and January bring about 17.8 inches of rain together at Sea-Tac in a normal year, almost half the annual total (NOAA 1991-2020).
Earthquake Preparedness
The 2001 Nisqually earthquake, magnitude 6.8, was centered beneath Anderson Island and felt across the Puget Sound region (PNSN).
Sagging Floors Over a Crawl Space
Damp crawl spaces and undersized posts or beams can leave floors bouncy or sloping, a common question in older Tacoma homes.
Buying an Older Home
About 43% of Tacoma homes were built before 1960 (ACS 2024 5-year), so inspection reports often flag foundation cracks or missing anchor bolts.
Get Every Warranty in Writing
Warranty terms come from each provider and from the makers of piers, brackets, liners and pumps. Before signing, ask for the workmanship warranty and each product warranty in writing: what they cover, how long, what voids them, and whether they transfer if you sell.
Service Area: Tacoma Metro
Counties served: Pierce, King