The Basement Guide

Basement Cost Guides 2026

Real pricing data for every basement project. No guesswork — just honest national averages with regional context.

$20–$75

per sq ft to finish

$3–$15k

waterproofing avg

$500–$3k

sump pump installed

$350–$1.5k

per foundation crack

Highest-Impact Cost Guides

All Cost Guides