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Foundation Underpinning Cost: $10,000–$30,000 (Average $25,000) in 2026

Author: CostGuideHQ Editorial·✓ Fact-checked·Updated July 2026·8 min read·6 sources·US national averages, USD
Quick answerQuick answer: Foundation underpinning typically costs $10,000 to $30,000, averaging around $25,000, driven mostly by how many piers the job needs and which type you use. Concrete piers run about $1,000 each, push/steel piers $1,500 to $2,000, and helical piers $1,750 to $4,000 — most houses need 5 to 10 piers.
  • A typical foundation underpinning project costs $10,000 to $30,000, averaging around $25,000 nationally (Angi).
  • Pier cost varies by type: concrete piers run about $1,000 each, push/steel piers $1,500 to $2,000, and helical piers $1,750 to $4,000 (Angi, Forbes Home, HomeGuide).
  • Most homes need 5 to 10 piers to underpin a foundation, though a single localized repair can need just 1, and severe settling can need 15 or more (HomeGuide, Forbes Home, Angi).
  • Engineering reports and permits add $200 to $5,000 and $200 to $3,600 respectively, on top of the piering work itself (Angi, HomeGuide, Bob Vila).

How much does foundation underpinning cost?

National average
$25,000
per pier
Typical range
$1,000–$50,000
Most projects
Whole project
$10,000–$30,000
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Cost by material / type

TypeLowHigh
concrete piers (per pier)$1,000$1,000
push/steel piers (per pier)$1,500$2,000
helical piers (per pier)$1,750$4,000
Estimate your cost
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Rough estimate only — get local quotes for exact pricing.

What affects the cost?

  • Pier type — concrete piers run about $1,000 per pier, push/steel piers $1,500 to $2,000, and helical piers $1,750 to $4,000, the most expensive of the three (Angi, Forbes Home, HomeGuide)
  • Number of piers needed — a single localized repair costs $1,000 to $3,000, while a severely settled home needing 15 or more piers can run $15,000 to $45,000; the average underpinning job uses about 10 piers (Angi, HomeGuide)
  • Soil type and depth to load-bearing soil or bedrock — push piers need bedrock within about 40 feet, helical piers work where bedrock is deeper, and contractors add $20 to $25+ per foot beyond standard pier depth (Angi, HomeGuide)
  • Underpinning method — mass concrete (pit) underpinning is typically the most cost-effective method, while mini-piled and beam-and-base methods cost more due to specialized equipment (HomeGuide)
  • Foundation type and accessibility — pier-and-beam foundations are cheaper to underpin than basements or slab foundations because the crawl space is easier to access and needs less excavation (Angi)
  • Labor — labor makes up around 80% of total underpinning cost (roughly $8,000 to $24,000 of a typical $10,000-$30,000 job), and foundation repair contractors charge $100 to $200 per hour (Angi)
  • Engineering and geotechnical reports — a structural engineer inspection runs $200 to $800 (Angi) or $300 to $1,000 (Bob Vila) or $500 to $1,000 (This Old House), while a full geotechnical report for helical piers costs $1,000 to $5,000, or $30 to $100 per hour (HomeGuide)
  • Permits — building permits for underpinning cost $200 to $1,000 generally (Angi), $600 to $3,600 for helical pier projects specifically (HomeGuide), or as low as $75 to $150 for general foundation repair permits (Bob Vila)
  • Existing structural damage — a foundation that has already suffered structural damage needs additional jacking during the work and often post-repair costs on top of the underpinning itself (Angi)

How much does foundation underpinning cost?

Most homeowners pay $10,000 to $30,000 to underpin a foundation, averaging around $25,000 nationally (Angi). Angi’s full data spread runs from $1,000 for a single-pier fix up to $50,000 for the most extensive jobs, and HomeGuide’s independent research lands on nearly the same headline figure — $10,000 to $30,000+. What decides where your job falls in that range is how many piers it needs and which type you use: concrete, push (steel), or helical. Underpinning specifically means installing piers beneath an existing foundation to transfer its weight onto stable soil — it’s the structural fix for a settling or sinking foundation, not the cosmetic crack sealing or waterproofing covered in foundation crack repair cost, and it’s a narrower job than the full house leveling process, which can also include mudjacking a sunken slab.

How much does each pier cost — helical vs. push vs. concrete?

Pier type is the biggest lever on your per-pier price. Concrete piers are cheapest at about $1,000 each (Angi, Forbes Home) — they’re stacked or poured in place to a shallow depth of roughly five to 10 feet, and work well under small structures or as a supplement on standard homes. Push piers, also called steel piers, cost $1,500 to $2,000 each (Forbes Home, Angi) and get driven straight down to bedrock, which makes them the standard choice where bedrock sits within about 40 feet of the surface (Angi). Helical piers cost the most, $1,750 to $4,000 per pier and averaging $2,375 to $3,000 (Forbes Home, HomeGuide, Angi) — they get screwed into the ground rather than driven, rely on dense soil instead of bedrock for support, and work in areas where bedrock is too deep for push piers to reach (Angi). Materials for a helical pier alone run $1,500 to $2,000, with labor adding another $500 to $2,000 or more per pier depending on soil difficulty and access (HomeGuide, Forbes Home).

How many piers does your house need?

This is the number that actually decides your total bill, and unlike some foundation repairs, it’s a question sources answer with real data instead of “it depends.” Most residential foundations need 5 to 10 piers (Forbes Home, HomeGuide) — Forbes Home notes that installing 5 piers runs about $15,000 and 10 piers about $30,000. HomeGuide breaks it down further by severity: a single pier for a localized soft spot costs $1,000 to $3,000; minor settlement needing 2 to 4 piers runs $2,000 to $12,000; moderate settlement with 5 to 8 piers costs $6,000 to $25,000; and severe settlement needing 8 to 10 or more piers runs $10,000 to $30,000 or beyond. Angi puts the average underpinning job at around 10 piers total, landing in that same $10,000-$30,000 band, and notes that a badly settled foundation needing 15 or more piers can push the bill to $15,000-$45,000. If sag is isolated to one section of a pier-and-beam foundation, you may only need to reset or add a single pier rather than underpin the whole perimeter.

What do engineering and permits add to the bill?

Underpinning almost always requires a permit, and helical-pier jobs in particular often need an engineer’s sign-off on depth and torque — budget for both on top of the piering itself. Permit costs vary by scope: Angi cites $200 to $1,000 for underpinning permits generally, HomeGuide cites $600 to $3,600 specifically for helical pier projects, and Bob Vila’s broader foundation-repair figure runs lower, $75 to $150. Engineering costs show a similar spread — a structural engineer inspection runs $200 to $800 (Angi), $300 to $1,000 (Bob Vila), or $500 to $1,000 (This Old House), while a full geotechnical report to confirm soil conditions and torque requirements for helical piers costs $1,000 to $5,000, or $30 to $100 per hour (HomeGuide). Underpinning is a job for licensed pros, not a DIY project. “Safety is key when working around foundations, crawlspaces, and basements,” says Tim O’Shea of The Build Pros — small stuff like patching hairline cracks or doing a basic inspection is fine to handle yourself, but structural repair work belongs to a licensed contractor (Angi).

How can you lower the cost of foundation underpinning?

  • Get a structural engineer’s assessment before hiring a piering contractor. At $200 to $800 (Angi) or $500 to $1,000 (This Old House), it pins down exactly how many piers you need instead of relying on a flat contractor estimate.
  • Ask whether concrete or push piers will work for your soil instead of defaulting to helical. Concrete runs about $1,000 per pier versus $1,750 to $4,000 for helical (Angi, Forbes Home).
  • Catch settling early. A single pier costs $1,000 to $3,000, while waiting until settling turns severe can push the job to 8-10+ piers and $10,000 to $30,000+ (HomeGuide).
  • Ask for a “no depth clause” so your per-pier price doesn’t rise if the crew has to go deeper than estimated (HomeGuide).
  • Get multiple quotes. Labor makes up about 80% of the total bill (Angi), and hourly rates for foundation repair pros vary by contractor and region.

Prices vary by soil conditions, foundation type, and how many piers your home needs, so treat the figures above as a planning budget. A foundation inspection is the right first step to find out how many piers your situation actually calls for.

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Frequently asked questions

How much does foundation underpinning cost?
Most underpinning projects cost $10,000 to $30,000, averaging around $25,000 (Angi), and HomeGuide's separate research lands on the same $10,000-$30,000+ headline figure. A single-pier fix for a localized problem can run as low as $1,000 to $3,000, while a severe, multi-pier job can top $50,000 (Angi, HomeGuide).
How much does a helical pier cost compared to a push pier or concrete pier?
Concrete piers are cheapest at about $1,000 per pier (Angi, Forbes Home), push/steel piers run $1,500 to $2,000 (Forbes Home, Angi), and helical piers cost the most at $1,750 to $4,000 per pier, averaging $2,375 to $3,000 (Forbes Home, HomeGuide, Angi).
How many piers does a house need?
Most residential foundations need 5 to 10 piers (Forbes Home, HomeGuide). A single sagging spot might need just 1 pier ($1,000-$3,000), HomeGuide's severity table puts 8 to 10+ piers at $10,000-$30,000+, and Angi notes severe jobs can need 15 or more piers ($15,000-$45,000).
What's the difference between a helical pier and a push pier?
Helical piers screw into the ground and rely on soil density for support, while push (hydraulic) piers are driven straight down until they hit bedrock (Angi, This Old House). Push piers work best where bedrock sits within about 40 feet of the surface; helical piers suit areas where bedrock is too deep for push piers to reach (Angi).
How much do engineering and permits cost for underpinning?
A structural or geotechnical engineer's report runs $200 to $5,000 depending on scope (Angi, HomeGuide, Bob Vila, This Old House), and building permits for underpinning cost $200 to $3,600 (Angi, HomeGuide).
Is underpinning cheaper than replacing the foundation?
Yes — underpinning tops out around $50,000, while full foundation replacement typically runs $20,000 to $100,000, since replacement usually means lifting the house first (Angi, Bob Vila).
Does labor make up most of the underpinning cost?
Yes — labor accounts for roughly 80% of the total bill, or about $8,000 to $24,000 of a typical $10,000-$30,000 project, since foundation repair contractors charge $100 to $200 per hour (Angi).

Sources

Figures synthesized and cross-checked across these sources (retrieved 2026-07-28):

  • Angi — Your foundation underpinning project costs $10,000 to $30,000 (normal range for the U.S.), depending on how many piers your home needs. Average $25,000, low end $1,000, high end $50,000. Type of pier cost per pier: concrete $1,000, push/steel $2,000, helical $3,000. A single pier costs $1,000 to $3,000. 15 or more piers push the total to $15,000-$45,000. The average number of piers a contractor uses is around 10, putting the typical all-in cost between $10,000 and $30,000. Building permits for underpinning cost $200 to $1,000. Labor accounts for around 80% of total cost, or $8,000 to $24,000. Hourly rate for a foundation repair contractor: $100-$200. Structural engineer cost: $200-$800 per inspection. Foundation drainage: $2,000-$20,000. Gutter system installation: $800-$8,000. Sinkhole repair: $10,000-$20,000. Soil gradation: $500-$1,000. Underpinning averages $25,000 while replacing a foundation under an existing structure is more likely to sit between $50,000 and $100,000; the most you'll spend on underpinning is around $50,000, about a third of the most you'd spend on foundation replacement. Tim O'Shea of The Build Pros: 'Safety is key when working around foundations, crawlspaces, and basements. Always wear protective gear like gloves, masks, and goggles, and ensure proper ventilation. Minor tasks like filling small cracks and basic inspections can be DIY projects, but leave structural repairs, extensive waterproofing, and significant drainage work to the pros.'
  • HomeGuide — Underpinning a foundation costs $10,000 to $30,000+ when the foundation can no longer support the building. Minor underpinning jobs involving a few piers cost $2,000 to $12,000. Major projects requiring extensive reinforcement cost $10,000 to $30,000 or more. Average cost by project type: single pier underpinning (1 pier) $1,000-$3,000; minor settlement (2-4 piers) $2,000-$12,000; moderate settlement (5-8 piers) $6,000-$25,000; severe settlement (8-10+ piers) $10,000-$30,000+. Underpinning methods include mass concrete/pit method (typically the most cost-effective), beam and base underpinning (often more expensive than mass concrete), mini-piled underpinning (typically more expensive than mass concrete or beam-and-base), screw pile/helical pier underpinning, and resin injection underpinning.
  • HomeGuide — Helical piers or helical piles cost $2,000 to $4,000 per pier installed on average for foundation repairs/structural damage, with most people spending about $3,000 per pier. Helical piers for a new deck cost $300 to $500 per pier. Average cost by number of piers: 3 piers $6,000-$12,000; 4 piers $8,000-$16,000; 5 piers $10,000-$20,000; 6 piers $12,000-$24,000; 8 piers $16,000-$32,000; 10 piers $20,000-$40,000; 15 piers $30,000-$60,000. Material costs total $1,500 to $2,000 per pier. Labor costs $500 to $2,000+ per pier. Installers charge $200 to $500 more per pier for hand-dug piers versus machine access. A geotechnical engineer charges $30 to $100 per hour, or $1,000 to $5,000 total, for a geotechnical report. Building permit fees range from $600 to $3,600 for foundation work. A typical residential home foundation often needs 5 to 10 piers; a small deck may only need 3. Push piers use the weight of the structure to stay in place while helical piers rely on high-density soil; push piers cost less ('$') than helical piers ('$$').
  • Forbes Home — Helical piers can cost as much as $3,000 a pier installed or as little as $1,750 a pier installed, averaging around $2,375 per pier installed (highest cost $3,000, lowest cost $1,750). Installation costs drive helical pier prices between $2,000 and $3,000. Most homes require between five and 10 piers; installing five can cost around $15,000 installed, and 10 can cost around $30,000. Parts and materials cost $1,500 to $2,000 per pier. Labor to install helical piers costs $1,000 to $1,500 per pier. Helical piers vs. other foundational supports, average installation cost per pier / average total installation cost: helical piers $2,375 / $17,800; steel piers $1,500 / $13,500; concrete piers $1,000 / $5,000; straight shaft end-bearing piers $2,000 / $20,000.
  • Bob Vila — Foundation repair costs range from $2,176 to $7,833, with a national average of $5,001. Piering or underpinning costs $1,000 to $3,000 per pier; each pier may cost anywhere from $700 to $2,100 depending on the type. Steel pier foundation-material repair cost: $950 to $19,200. Permits average $75 to $150. A structural engineer report can cost between $300 and $1,000. A soil report can run between $500 and $3,000. Foundation lifting costs $20,000 to $23,000. Foundation replacement costs $20,000 to $100,000.
  • This Old House — Piering/underpinning costs $1,000 to $3,000 per pier. Helical piers are hollow, threaded pillars that are fairly easy to screw into the ground with little soil disruption. Hydraulic piers, also called push piers, are smooth pillars that must be driven into the ground by a powerful hydraulic pump; they're more often used beneath industrial buildings than homes. Structural engineer reports cost $500 to $1,000. Soil reports cost $500 to $3,000.

Underpinning here means installing piers (concrete, push/steel, or helical) beneath an existing foundation to transfer its load onto stable soil — the structural fix for a settling or sinking foundation. It's distinct from the broader house-leveling-cost guide (which also covers mudjacking a sunken slab) and from pier-and-beam-foundation-repair-cost (which covers rotted beam/joist work on top of piering); it also excludes cosmetic crack sealing and waterproofing, covered separately by foundation-crack-repair-cost. Three sources price piers by type with real numbers: Angi (concrete ~$1,000, push/steel ~$2,000, helical ~$3,000 per pier), Forbes Home (concrete avg $1,000, steel avg $1,500, helical avg $2,375 with a stated range of $1,750-$3,000, straight-shaft end-bearing avg $2,000 per pier), and HomeGuide (helical piers specifically $2,000-$4,000 per pier, averaging about $3,000). Concrete piers cluster tightly at exactly $1,000 across Angi and Forbes Home, which anchors that by_type row as a single point rather than a fabricated range. Push/steel piers use Forbes Home's steel-pier average ($1,500) as the low end and Angi's push/steel figure ($2,000, matching Forbes Home's straight-shaft end-bearing average) as the high end. Helical piers use Forbes Home's stated low ($1,750) and HomeGuide's stated high ($4,000), which brackets Angi's $3,000 point estimate. unit range across all three pier types therefore runs $1,000 to $4,000 per pier, which is reflected in range_low_usd/range_high_usd alongside the full project spread. Angi is the only source with a dedicated whole-project underpinning breakdown by pier count: 1 pier $1,000-$3,000, 2-4 piers (minor settlement) $2,000-$12,000, 5-8 piers (moderate settlement) $6,000-$25,000, and 8-10+ piers (severe settlement) $10,000-$30,000+ — HomeGuide's underpinning page independently publishes the same four-tier breakdown with matching figures. Angi states a national normal range of $10,000-$30,000 (used for project_low_usd/project_high_usd), a stated average of $25,000 (national_average_usd), and a stated low end of $1,000 and high end of $50,000 (range_low_usd/range_high_usd) for a project that needs 15+ piers, priced at $15,000-$45,000. Forbes Home and HomeGuide both independently converge on 5 to 10 piers as what a typical residential foundation needs, and Forbes Home notes installing 5 piers runs about $15,000 while 10 runs about $30,000 — consistent with Angi's ~10-pier average job at $10,000-$30,000. Engineering and permit costs vary by scope and source: HomeGuide's helical-pier page cites a geotechnical engineer report at $1,000-$5,000 total (or $30-$100/hour) and helical-pier-specific permits at $600-$3,600; Angi cites general underpinning permits at $200-$1,000 and a structural engineer inspection at $200-$800; Bob Vila cites foundation-repair permits at $75-$150, a structural engineer report at $300-$1,000, and a soil report at $500-$3,000; This Old House cites a structural engineer report at $500-$1,000 and a soil report at $500-$3,000. The spread reflects that a full geotechnical survey (required for deep helical-pier installations) costs more than a basic structural inspection. For scale, Bob Vila and Angi both note that full foundation replacement ($20,000-$100,000, Bob Vila; and about triple underpinning's $50,000 ceiling, Angi) costs far more than underpinning. Figures cover the piering/underpinning work itself (materials, labor, standard-depth installation); they exclude post-repair cosmetic work, full foundation replacement, and unrelated drainage fixes, which sources price as separate line items.