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Basement Waterproofing Cost in Williamstown, NJ
Detailed pricing guide with local market adjustments and material comparisons
Williamstown Average
$1,870–$9,350
Market Tier
Small City
Cost Breakdown
Basement Waterproofing Cost in Williamstown
Small CityLowAverageHigh
$1,870$5,610$9,350
Market Tier
Small City (0.85x)
Small city with below-average costs
Climate Adjustment
1.1x
Based on local climate conditions
Material Cost Comparison
Interior drainage channel(Budget)
$1,403–$7,013Waterproofing membrane(Mid-Range)
$1,870–$9,350Sump pump and basin(Premium)
$2,618–$13,090Factors that affect your cost
- Interior vs exterior waterproofing
- Linear footage of affected walls
- Sump pump installation included
- French drain installation
- Foundation crack repair needed
- Exterior excavation required
- Dehumidifier addition
Get Quotes in Williamstown
Williamstown Housing Market
Median Home Price
$425,000
Homes for Sale
22
Price per Sq Ft
$236
Local Pros
655
Home Service Professionals Near Williamstown
Agents 173Landscapers 82multimedia_specialist 81lender 75Movers 71Roofers 61HVAC Techs 57Flooring 55
Median Household Income
$87,021
Median Home Value
$255,000
Median Rent
$1,262/mo
Homeownership Rate
79.6%
Population
14,855
Median Year Built
1981
Source: U.S. Census Bureau, ACS 2023 5-Year Estimates
Track Your Costs
Renovation
Basement Waterproofing
Date
April 2026
Cost
$5,610
Vendor
Your local pro
Warranty
25-year material warranty
Williamstown average: $1,870–$9,350
Before
Issue documented with photos
After
Repair completed, area sealed
Materials Used
Interior drainage channelWaterproofing membraneSump pump and basinHydraulic cement
Warranty Details
25-year material warranty
Auto-Checkup Created
"Basement Moisture Check" — every 12 monthsWilliamstown: Moderate rainfall + freeze-thaw cycling creates basement moisture risk
Added by youApril 2026
Property Health Score
Good
86
foundation category +15 pts(71 → 86)
Documentation19/25
Maintenance20/25
Warranty22/25
Investment21/25
Your health score is calculated based on documentation completeness, maintenance currency, warranty coverage, and investment tracking.
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I found several contractors in your area. Here are the top results:
SM
Smith & Sons
Connectedcontractor
4.9(47)
BookQuote
JR
J&R Home Services
contractor
4.7(23)
From $95/hr
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Title:contractor
Category:contractor
Date:2026-04-08
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Cost FAQ
What is the average cost of basement waterproofing in Williamstown?
The average cost of basement waterproofing in Williamstown, NJ ranges from $1,870 to $9,350. The final price depends on Interior vs exterior waterproofing, Linear footage of affected walls, Sump pump installation included.
What factors affect basement waterproofing cost?
Key factors include: Interior vs exterior waterproofing, Linear footage of affected walls, Sump pump installation included, French drain installation, Foundation crack repair needed, Exterior excavation required, Dehumidifier addition. In Williamstown, local labor rates and material availability also influence pricing.
How do I get accurate quotes for basement waterproofing in Williamstown?
Get at least 3 quotes from licensed professionals in Williamstown. Use Fizbo SmartSearch to find and compare local contractors, read reviews, and request estimates — all in one place.