A whole-house dehumidifier costs $1,100 to $3,500. The cost to install a dehumidifier in a basement or crawl space is $1,000 to $3,000.| HomeGuide
Sump pumps cost $600 to $2,500 with installation on average, depending on the type, size, and installation difficulty.| HomeGuide
Interior basement waterproofing costs $4,500 to $10,000 on average. Exterior waterproofing a basement costs $10,000 to $15,000.| HomeGuide
Crawl space encapsulation costs $1,500 – $15,000. A vapor barrier costs $2 – $4 per square foot. Costs include a drainage system, insulation, repairs, and sealing.| HomeGuide