Cost engine

How much does basement waterproofing cost?

National price ranges for basement waterproofing, the unit pricing contractors quote from, and what the same job costs across local markets.

Model reviewed August 2026

Basement Waterproofing cost

$3,000 – $18,000

Most homeowners pay around $8,200 for basement waterproofing, or $55–$160 per linear foot of drain installed. Permit fees add $0–$400.

What homeowners reported paying

Invoice amounts submitted by homeowners nationwide, shown beside the model.

Price breakdown

Budget scope$3,000
Typical project$8,200
Premium / complex$18,000
per linear foot of drain installed$55 – $160
Permit fees$0 – $400
Timeline2-5 days of work

What drives the price

  • Interior drain tile versus exterior excavation and membrane
  • Linear feet of wall treated and the number of sump pits
  • Concrete breakout and replacement inside the slab
  • Battery backup or a second pump for redundancy
  • Grading, downspout extension and window well work outside

Cost by state

The same scope priced through each state's labor, material and code load.

Most expensive states

Hawaii$13,400Alaska$11,100California$11,100New York$10,700Massachusetts$10,500District of Columbia$10,400

Least expensive states

Mississippi$7,000Oklahoma$7,200Arkansas$7,200West Virginia$7,300Kansas$7,300South Dakota$7,400

Basement Waterproofing runs about 91% more in Hawaii than in Mississippi for an identical scope — almost entirely a labor and code-load difference.

Waterproofing cost in Hawaii$4,900 – $29,500 · +64%Waterproofing cost in Alaska$4,100 – $24,300 · +35%Waterproofing cost in California$4,100 – $24,300 · +35%Waterproofing cost in New York$3,900 – $23,500 · +31%Waterproofing cost in Massachusetts$3,900 – $23,100 · +28%Waterproofing cost in District of Columbia$3,800 – $22,800 · +26%Waterproofing cost in New Jersey$3,700 – $22,300 · +24%Waterproofing cost in Connecticut$3,600 – $21,800 · +21%Waterproofing cost in Rhode Island$3,600 – $21,400 · +19%Waterproofing cost in Washington$3,500 – $21,200 · +18%Waterproofing cost in Oregon$3,500 – $20,900 · +16%Waterproofing cost in Maryland$3,400 – $20,500 · +14%Waterproofing cost in Illinois$3,300 – $20,000 · +11%Waterproofing cost in New Hampshire$3,300 – $19,900 · +11%Waterproofing cost in Colorado$3,300 – $19,700 · +9%Waterproofing cost in Vermont$3,300 – $19,500 · +8%Waterproofing cost in Maine$3,200 – $19,200 · +7%Waterproofing cost in Nevada$3,200 – $19,300 · +7%Waterproofing cost in Delaware$3,200 – $19,100 · +6%Waterproofing cost in Florida$3,200 – $19,200 · +6%Waterproofing cost in Minnesota$3,200 – $19,100 · +6%Waterproofing cost in Pennsylvania$3,200 – $19,200 · +6%Waterproofing cost in Virginia$3,100 – $18,800 · +4%Waterproofing cost in Arizona$3,000 – $18,200 · +1%Waterproofing cost in Montana$3,000 – $18,200 · +1%Waterproofing cost in North Dakota$3,000 – $17,700 · -1%Waterproofing cost in Wisconsin$3,000 – $17,900 · -1%Waterproofing cost in Wyoming$3,000 – $17,700 · -2%Waterproofing cost in Idaho$2,900 – $17,500 · -3%Waterproofing cost in Michigan$2,900 – $17,700 · -2%Waterproofing cost in Utah$2,900 – $17,700 · -2%Waterproofing cost in Louisiana$2,900 – $17,400 · -4%Waterproofing cost in Texas$2,900 – $17,400 · -4%Waterproofing cost in Georgia$2,900 – $17,100 · -5%Waterproofing cost in New Mexico$2,900 – $17,100 · -5%Waterproofing cost in North Carolina$2,800 – $17,000 · -6%Waterproofing cost in Ohio$2,800 – $16,900 · -6%Waterproofing cost in Indiana$2,800 – $16,700 · -7%Waterproofing cost in South Carolina$2,800 – $16,800 · -7%Waterproofing cost in Alabama$2,700 – $16,400 · -9%Waterproofing cost in Missouri$2,700 – $16,400 · -9%Waterproofing cost in Tennessee$2,700 – $16,400 · -9%Waterproofing cost in Iowa$2,700 – $16,300 · -9%Waterproofing cost in Kentucky$2,700 – $16,200 · -10%Waterproofing cost in Nebraska$2,700 – $16,200 · -10%Waterproofing cost in South Dakota$2,700 – $16,300 · -9%Waterproofing cost in Kansas$2,700 – $16,000 · -11%Waterproofing cost in West Virginia$2,700 – $16,000 · -11%Waterproofing cost in Arkansas$2,600 – $15,800 · -12%Waterproofing cost in Oklahoma$2,600 – $15,800 · -12%Waterproofing cost in Mississippi$2,600 – $15,500 · -14%

State benchmark table

Low, typical and high basement waterproofing pricing in every state, from the same model as the ranges above.

StateLowTypicalHighvs US
Hawaii$4,900$13,400$29,500+64%
Alaska$4,100$11,100$24,300+35%
California$4,100$11,100$24,300+35%
New York$3,900$10,700$23,500+31%
Massachusetts$3,900$10,500$23,100+28%
District of Columbia$3,800$10,400$22,800+26%
New Jersey$3,700$10,200$22,300+24%
Connecticut$3,600$9,900$21,800+21%
Rhode Island$3,600$9,700$21,400+19%
Washington$3,500$9,700$21,200+18%
Oregon$3,500$9,500$20,900+16%
Maryland$3,400$9,300$20,500+14%
Illinois$3,300$9,100$20,000+11%
New Hampshire$3,300$9,100$19,900+11%
Colorado$3,300$9,000$19,700+9%
Vermont$3,300$8,900$19,500+8%
Maine$3,200$8,800$19,200+7%
Nevada$3,200$8,800$19,300+7%
Delaware$3,200$8,700$19,100+6%
Florida$3,200$8,700$19,200+6%
Minnesota$3,200$8,700$19,100+6%
Pennsylvania$3,200$8,700$19,200+6%
Virginia$3,100$8,600$18,800+4%
Arizona$3,000$8,300$18,200+1%
Montana$3,000$8,300$18,200+1%
North Dakota$3,000$8,100$17,700-1%
Wisconsin$3,000$8,100$17,900-1%
Wyoming$3,000$8,100$17,700-2%
Idaho$2,900$8,000$17,500-3%
Michigan$2,900$8,000$17,700-2%
Utah$2,900$8,000$17,700-2%
Louisiana$2,900$7,900$17,400-4%
Texas$2,900$7,900$17,400-4%
Georgia$2,900$7,800$17,100-5%
New Mexico$2,900$7,800$17,100-5%
North Carolina$2,800$7,700$17,000-6%
Ohio$2,800$7,700$16,900-6%
Indiana$2,800$7,600$16,700-7%
South Carolina$2,800$7,600$16,800-7%
Alabama$2,700$7,500$16,400-9%
Missouri$2,700$7,500$16,400-9%
Tennessee$2,700$7,500$16,400-9%
Iowa$2,700$7,400$16,300-9%
Kentucky$2,700$7,400$16,200-10%
Nebraska$2,700$7,400$16,200-10%
South Dakota$2,700$7,400$16,300-9%
Kansas$2,700$7,300$16,000-11%
West Virginia$2,700$7,300$16,000-11%
Arkansas$2,600$7,200$15,800-12%
Oklahoma$2,600$7,200$15,800-12%
Mississippi$2,600$7,000$15,500-14%

Cost by city

Same scope, adjusted for local labor, material and permit pricing. Each city also has a permit page.

Frequently asked questions

Is a permit needed to waterproof a basement?

Interior drainage is often treated as maintenance, but adding a sump discharge, altering plumbing or excavating against the foundation usually triggers a permit. Ask the local building department before work starts.

Does interior drainage fix the cause?

It manages water that has already reached the wall. When the cause is grading, gutters or a downspout discharging beside the foundation, correcting that outside is cheaper and should come first.

How long does basement waterproofing take?

2-5 days of work. Permit review and inspection scheduling are usually the largest source of variation.

What changes the price the most?

The largest cost drivers are interior drain tile versus exterior excavation and membrane; linear feet of wall treated and the number of sump pits; concrete breakout and replacement inside the slab.

Sources

Sources & verification

Model vintage August 2026. The links above are the issuing agencies' own pages — we publish them so you can confirm the current rule yourself, not as evidence that each fact on this page was re-checked with them today. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing, not quotes. Permit rules change; confirm with the building department before starting work.