{
  "url": "bluelakeconstruction.com/faq/does-a-bump-out-addition-require-a-concrete-foundation",
  "name": "Does a bump-out addition require a concrete foundation?",
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    {
      "name": "Does a bump-out addition require a concrete foundation?",
      "@type": "Question",
      "acceptedAnswer": {
        "text": "Whether your bump-out requires a foundation depends on the distance the structure extends from your exterior wall. Small bump-outs extending about two to three feet can often be cantilevered, meaning existing floor joists are extended outward without touching the ground beneath. For bump-outs extending deeper, such as four to ten feet, building codes typically require structural ground support such as concrete footings, piers, or a continuous stem wall foundation. The decision factor comes down to structural load and soil support; cantilevering avoids digging but limits total depth and heavy floor loads, whereas footings support heavy features like large tile showers or masonry.",
        "@type": "Answer",
        "description": "Small bump-outs up to three feet can often cantilever from existing floor joists, while deeper extensions require ground support like concrete footings or stem walls."
      }
    }
  ],
  "description": "Small bump-outs up to three feet can often cantilever from existing floor joists, while deeper extensions require ground support like concrete footings or stem"
}