Basement Detective

What They Do

Water DamageMoldMold Testing

• Adequate Drainage
• Basement Assessment
• Basement Finishing
• Basement Remodeling
• Basement Water
• Basement Waterproofing
• Custom Solutions
• Drainage & Water
• Drainage Issues
• Egress Service
• Foundation Repair
• Foundation Water
• Mold Clean Up Services
• Mold Issues
• Mold Remediation And Removal
• Plumbing Leaks
• Sealing Basement
• Sump Pump
• Total Waterproofing
• Water Collection
• Water Damage
• Water Intrusion
• Water Leak
• Water Management Solutions
• Water Seepage
• Waterproofing Foundation
• Sump pump installation
• Sump pump repair

In Their Own Words

Basement Detective is a family-owned basement waterproofing company serving Alexandria, Northern Virginia, and nearby Maryland communities. The company helps homeowners diagnose and repair basement water intrusion, sump pump problems, French drain issues, foundation leaks, crawl space moisture, and mold-related basement concerns. Basement Detective focuses on thorough inspections, practical repair options, and long-term basement water solutions.

Written by the business on its public profile. We have not verified these claims.

Before You Call Basement Detective

1. Do you take moisture readings every day and will you give me the drying log?
2. Are your technicians certified in water damage restoration?
3. Where do you think the moisture is coming from, and who fixes it?
4. Will you set up containment and negative air, and how will you protect the rest of the home?
5. Do you also do remediation? If so, who checks your work?

Ask for the license that fits where you live, a DC home improvement license, a Maryland Home Improvement Commission license or a Virginia Board for Contractors license, and look it up with that agency. Also ask for proof of insurance and industry certification for the technicians.

How Their Reviews Break Down

Counts from public listings as of September 23, 2026. A handful of reviews says less than a few hundred.

Read This While You Wait

• DIY with careWhat to Do in the First 24 Hours After Water DamageAn hour by hour plan for the first day after water damage. Make it safe, stop the source, document, remove water and start drying before mold can start.
• DIY with careSafe DIY Mold Cleanup for Areas Under 10 Square FeetA step by step method to clean up mold under 10 square feet safely, with the gear to buy, what to throw away, why bleach is not the default, and when to stop.
• Call a proMold Testing, When It Is Worth It and How to Read a Lab ReportWhen a mold test is worth paying for, which kind to ask for, why store kits mislead, and how to read spore counts, outdoor controls and a lab report yourself.
• DIY friendlyWasher, Dishwasher, Fridge and Toilet Supply Line LeaksHow washer hoses, dishwasher lines, ice maker tubing and toilet supply lines fail, how to clean up each kind of leak, and how to replace a line yourself.