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Foundation Cost in Idaho (2026)

New-construction foundation pours in Idaho typically run $14,400–$32,800 for a full-house 2,000 sq ft new-construction foundation pour, with full basement pour as the dominant residential foundation type. Buried footings must clear the 36-inch design frost line. Idaho's combination of 36-inch frost depth across the Treasure Valley and Snake River Plain, expansive Treasure Valley clay subsoil across Ada and Canyon counties, and Idaho statewide radon zone 1 designation drives aggressive frost-protected footing depth, capillary-break crushed-stone, and sub-slab depressurization rough-in on every Boise-Meridian-Nampa residential foundation pour, with northern Idaho mountain pours additionally requiring frost-protected shallow foundation (FPSF) designs in alpine subdivisions where excavation to 36-inch frost depth is impractical.

State Idaho
Cities Covered 8
Typical full-house 2,000 sq ft new-construction foundation pour $14,400 – $32,800
BLS construction-laborer wage $21.24/hr

Idaho climate, soil, seismic & hydrologic drivers

  • Frost-line trench depth: 36-inch design minimum for buried footings
  • Dominant residential foundation type: Full basement — dominant in Upper Midwest, Northeast, and Mid-Atlantic on freeze-thaw + radon-zone-1 sites
  • Expansive soil risk: Moderate — periodic clay shrink-swell, standard footing reinforcement adequate
  • Seismic design category (ASCE 7-22): SDC C — moderate seismic risk, continuous-rebar-tie footings required
  • Hurricane wind tier: No hurricane wind-design exposure
  • Water table risk: Low — deep water table, no sump-pump rough-in required
  • Sulfate exposure (ACI 318): S1 — moderate sulfate exposure, ASTM C150 Type II cement required
  • IECC climate zone: 5B-6B
  • EPA radon zone: Zone 1 (highest) — passive sub-slab depressurization rough-in required on every basement and slab pour

Idaho licensing & permits

  • License status: Statewide registration required (no exam)
  • License board: Idaho Bureau of Occupational Licenses — Public Works Contractor License (PWCL) for residential >$2,000 + Idaho Contractors Registration (official site)
  • Permit: city or county building permit required for residential foundation pour above 200 sq ft; PWCL required for public + private residential work above $2,000; Treasure Valley clay subsoil requires geotechnical investigation; Idaho radon zone 1 mandates sub-slab depressurization rough-in

How foundation pour costs vary in Idaho

State-specific code or insurance rule: Idaho is one of only a few Mountain West states without a centralized residential builder license — Idaho Bureau of Occupational Licenses operates a Public Works Contractor License (PWCL) for residential foundation work above $2,000 plus a Contractors Registration system without examination or bond requirement, leaving Treasure Valley homeowners to rely on PWCL bond (only $25,000) and Idaho Contractor Registration history rather than a state-board credential check, plus Boise, Meridian, and Nampa municipalities separately enforce Treasure Valley expansive-clay geotechnical investigation requirements on every Ada and Canyon County residential foundation pour above 5,000 sq ft footprint.

Cities in Idaho

Compare foundation pour pricing for 8 cities across Idaho.

Boise City, ID

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Caldwell, ID

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Coeur Dalene, ID

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Idaho Falls, ID

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Meridian, ID

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Nampa, ID

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Pocatello, ID

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Twin Falls, ID

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Pricing ranges reflect Idaho market labor (BLS OEWS construction-laborer (foundation work) mean $21.24/hr) and Woogoro regional cost modeling. For the most localized estimate, see your nearest city page above.