The question nobody answers
Read my basement.
Six questions about your actual basement. You get the code issues you are facing, how long it takes, what needs a permit, and a price band that narrows as you answer. It starts wide on purpose, because right now we know nothing about your house.
The reading0 of 6 answered
Not a number yet
Answer the first question and this starts to tighten.
Send this with my requestWhat you have already read somewhere else
Every number you have found tonight is for a different basement.
These are real published figures, with the source, so you can see how wide the field is before anyone quotes you. None of them is a price for your house.
71%
of a midrange basement remodel is recouped at resale, the highest of the projects newly added to the survey that year. It is the honest answer to whether this is worth doing, and it is not 100 percent.
$22,887
national average for a basement remodel. This is the first number Google gives a Chicago homeowner, and it is an average across states where basements are dry, have no drain tile, no ejector pit and no headroom problem. It is not wrong. It is for a different house.
$12,447 to $14,833
to waterproof a 1,000 square foot basement, with interior drainage systems running 60 to 120 dollars per linear foot. In Chicago clay a wet basement has to be fixed before it can be finished, so if yours takes water, this comes first.
$4,216
average installed cost of an egress window, typical range 2,718 to 5,878 dollars. That is the window. Excavating and building the well behind it is usually the larger number, and nobody can quote either one over the phone.
$800 to $2,500
for a radon mitigation system, with most homeowners paying 1,000 to 2,000. Against a five figure finish it is the cheapest serious problem on this page, and the one most often skipped.
Figures as published by those sources and checked in September 2026. We have not adjusted them.
- WhyA 20 to 40 percent spread on the same basement is normal. It is also the clearest signal that somebody’s scope is missing a line. In the order that matters:
- 01Scope that is not actually the same. Three bids, three numbers, and not one of them is for the same job. The gap is almost never the price of drywall. It is what got left out.
- 02Water. If the basement takes water, that has to be fixed before a single stud goes up, and it is its own line. A bid that ignores it is shorter, not cheaper.
- 03Whether the bathroom is on a pump. An ejector pit is concrete cutting, a sealed lid, a vent and a circuit. It is the line that most often separates two quotes on the same basement.
- 04Headroom. Boxing a duct into a soffit is a day. Underpinning to buy two feet of depth is a different project with a structural engineer attached.
- 05What is behind the walls. Cast iron near the end of its life, wiring that will not take new circuits, a beam nobody expected. Older houses carry more of it, so we carry an allowance for it.