How do I find the best basement waterproofing companies near me?

Start with three checks: a strong local review record, proof they are licensed and insured, and a written warranty that survives the sale of your home. The best basement waterproofing companies near you fix water from the inside with full-perimeter drainage, not by digging up your yard, and they put the price and the guarantee in writing before you sign. In southern New Hampshire, Maine, and Massachusetts, that is the bar we hold ourselves to at 603 Basement Solutions, and basement waterproofing with our Forever Dry System runs $3,000 to $30,000.

What separates a good company from a salesman

Most wet basements come down to the same problem. The soil around your foundation is disturbed backfill, the loose dirt that got put back when the house was built. It drains slowly and holds water against your walls. Add NH frost heave pushing those walls inward, and water finds the floor wall joint. A good company will explain that to you. A salesman will just hand you a number.

So when you call around, listen for who teaches.

Here is what to actually check.

Look at the local reviews. Not the count alone. Read them. Look for repeat themes, named crew, and how the company answers a bad one. We run a Google rating of 4.9 across 257 reviews, and we have served more than 5,000 homeowners in New England.

Confirm licensed and insured. Ask for proof of insurance. We are licensed and insured and OSHA-certified. One note for NH: the state issues no general contractor license number, so any company that waves around a “NH GC license #” is bluffing. Ask for insurance instead.

Check the BBB. We are BBB A+ accredited, since 2022.

Then ask about the warranty in writing.

The warranty is the real tell

A guarantee you can read beats a promise you can’t. Our Forever Dry System carries a full transferable lifetime warranty, guaranteed dry for life! The transfer is conditional, it stays valid as long as no other contractor or homeowner alters the work. Ask any company you call for the same thing on paper.

The Forever Dry System is interior work: full-perimeter drainage, a sump pump sized at 1/2 hp per 120 feet of drain, a 12-mil wall vapor barrier, and a dehumidifier. We add a battery backup sump too. A charged backup battery keeps the pump running when the power goes out in a storm, which is exactly when the water comes in.

One thing we will tell you even though it costs us the job. Skip exterior excavation waterproofing. In our field experience, digging the outside is a poor fix that tends to fail in about two to three years. The durable fix is interior drainage. If a company is pushing a big dig, ask why.

What drives the cost

Price tracks the size of the basement, how much drain you need, and whether your floor wall joint or walls need extra work. We give you a free inspection and a free estimate, with a quote within 24 hours, so you see the number before you decide anything. Financing runs through Hearth, subject to approval, and we make nothing on it.

If your wet spot is a crawl space instead of a basement, that is a different job. We use crawlspace encapsulation, and that runs $3,000 to $25,000. The Forever Dry System is for basements only.

You can read more on the work itself here:

• Basement waterproofing
• Crawl space services
• Structural and foundation repair
• The 603 Guarantee

For neutral background, the DOE Building America program covers foundation moisture, and the Insurance Information Institute explains how water damage interacts with homeowners coverage.

Get a straight read on your basement

Call us at 603-610-1770 or book your free inspection. We will look at your basement, tell you what it actually needs, and put the number and the warranty in writing.

Related questions

Are exterior basement waterproofing companies worth it? In our experience, no. Exterior excavation tends to fail in about two to three years, and it costs more to dig. We fix water from the inside with full-perimeter drainage, which holds. See basement waterproofing.

How fast can a company give me a waterproofing quote? We give you a free inspection and a quote within 24 hours. No deposit to look. You see the price and the warranty before you commit.

What if my water problem is in a crawl space, not a basement? That needs crawlspace encapsulation, not the Forever Dry System. It runs $3,000 to $25,000 and carries a 25-year warranty. See crawl space services.

Does a basement waterproofing warranty transfer if I sell my house? Ours does. The Forever Dry System warranty is transferable for life, as long as no one else alters the work after us. See the 603 Guarantee.