How Much Does It Cost to Finish a Basement in 2026?

The 2026 range

National average: $35–$75 per sq ft for a finished basement. A 1,000 sq ft basement therefore lands $35K–$75K, with mid-range around $52K including one bathroom, egress window, LVP flooring, and standard drywall + trim.

Line-item budget for a 1,000 sq ft mid-range finish

• Framing + insulation: $6,500
• Electrical (permits + rough-in + trim): $5,500
• Plumbing (bath rough-in): $6,000
• HVAC extension: $3,200
• Drywall + paint: $7,500
• LVP flooring: $6,000
• Bathroom (60 sq ft): $12,500
• Egress window + well: $3,800
• Doors, trim, misc: $4,000

Never skip these three

Egress window (life safety + code), interior perimeter drain if the basement has ever been damp, and a dedicated dehumidifier tied into the drain. All three feel optional until they aren't.