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Basement Finish Budget Calculator
Basement finish runs $25-$80/sqft. Basic framing + drywall + flooring + electrical at $35-$50/sqft. Add bath: $8K-$20K. Egress windows: $2K-$5K each. This calculator sizes. Permit application typically requires architectural drawings showing egress, electrical load calc, and insulation plan. Inspections happen after framing/electrical rough-in, drywall, and final. Hidden costs frequently arise from moisture remediation not budgeted for — waterproofing a wet basement can add $3K-Basement finish runs $25-$80/sqft. Basic framing + drywall + flooring + electrical at $35-$50/sqft. Add bath: $8K-$20K. Egress windows: $2K-$5K each. This calculator sizes.0K before any finish work begins. Always pre-inspect with a foundation specialist before finalizing your budget.
Total basement finish
$56,000
Base finish
$40,500
Egress windows
$3,500
How the math works
900 sqft standard: $40,500 + $12K bath + $3,500 egress = $56,000. Premium tier: ~$70-$80K total.
Permit required almost everywhere. Get 3 quotes from contractors who specialize in basement finishing — they understand moisture and egress better than generalist contractors.
How to Use
- Enter sqft and scope tier.
- Add bathroom, wet bar, egress windows as applicable.
- See total.
Frequently Asked Questions
Basement finish ROI?
60-70% cost recovery per NAR. Adds living square footage cheaply. Best ROI: open layout with egress window (counts as bedroom) + bath.
Moisture issues?
Critical. Interior waterproofing + sump pump ($3K-$8K) if any water history. French drain + grading. Don't finish over wet basement — mold disaster in 6 months.
Egress requirement?
Any basement bedroom requires egress window (opening to outside meeting size/height code). Without egress, can only be called 'non-conforming' bedroom. Install costs $2,500-$5,000.
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