Choosing a basement waterproofing company in New Jersey comes down to five things: in-house crews, a transferable warranty, a written and itemized quote, proof that the company is registered and insured, and a local track record.
Get those five right, and you avoid the mistakes that cost homeowners thousands.
The company matters as much as the fix. A dry basement depends on a proper basement waterproofing system, installed by a team that stands behind it.
This guide covers what to look for, the questions to ask before you sign, and the red flags that should make you walk away.
Start with these five signals. Each one protects your home and your money.
United Waterproofing is a family-owned company that never uses subcontractors. The owner is on every job, and the company has more than 25 years of experience across Morris County and northern New Jersey. Every system is backed by a 100 percent lifetime transferable warranty.
In New Jersey, any company doing home improvement work must register with the NJ Division of Consumer Affairs and carry commercial general liability insurance of at least $500,000. A registered contractor has a number that starts with 13VH, and state law requires them to show it on contracts and advertising.
Insurance is not a formality. If a worker is hurt on your property, or the work damages your home, the contractor’s liability coverage pays for it instead of you. That is why proof of insurance matters as much as the registration number.
Before you sign, verify the registration through the NJ Division of Consumer Affairs and ask to see proof of insurance. A company that will not share either one is a company to avoid. United Waterproofing is registered with the NJ Division of Consumer Affairs and holds an A+ rating with the Better Business Bureau.
The right questions reveal how a company works. Use this list, and listen for the difference between a solid answer and a warning sign.
Question to ask | A solid answer | A warning sign |
|---|---|---|
Do your own employees do the work? | Yes, our in-house crew handles every job. | We use trusted subcontractors. |
Is the warranty transferable to a future owner? | Yes, in writing, and it transfers to the next owner. | We offer a warranty, with no mention of transfer. |
Can I get an itemized written quote? | Yes, every part and price is listed. | I will give you one lump number. |
What is your NJ registration number? | It starts with 13VH, and here it is. | Hesitation, or no number at all. |
How much deposit do you require? | A modest deposit, with the balance when the work is done. | Most of it up front, in cash. |
Some warning signs are clear once you know them. Watch for these before you hand over any money.
The FTC guidance on avoiding home improvement scams points to the same warning signs. It advises hiring only licensed and insured contractors, getting more than one written estimate, and never paying the full amount up front.
A transferable warranty is a selling point. When you list your home, a documented and warrantied dry basement gives buyers confidence and removes a common objection during inspection.
A non-transferable warranty ends the day you sell, so the buyer starts from zero. A warranty that transfers to the next owner keeps that protection in place and has real value on paper. A home inspector or appraiser will often note a waterproofing system and its warranty, which can support your asking price.
United Waterproofing backs every system with a 100 percent lifetime transferable warranty that passes to one future owner.
The lowest number is not always the best deal. Compare quotes on the same scope of work, not just the price.
For a sense of real numbers, see our guide on what basement waterproofing costs in New Jersey, then ask each company to quote the same scope so you compare like for like.
When two quotes finally match on scope, the choice usually comes down to the company behind the work: its crews, its warranty, and its track record in New Jersey.
Look for five things: in-house crews rather than subcontractors, a transferable warranty, a written and itemized quote, proof the company is registered with the NJ Division of Consumer Affairs and insured, and a local track record. A company that meets all five is a safe bet.
It is better if they do not. When one in-house crew handles the job from start to finish, accountability and quality stay in one place. Subcontracted labor passes responsibility around, which is where problems tend to start.
New Jersey home improvement contractors must register with the NJ Division of Consumer Affairs and display a number that starts with 13VH on contracts and ads. Verify that number through the state's license verification tool and ask for proof of liability insurance.
A transferable warranty passes to the next owner if you sell the home. It protects you now and adds value at resale, because the buyer inherits the coverage. A non-transferable warranty ends the day you sell.
At least 3 feet away from your home’s foundation, preferably downhill or into a designated drainage area to prevent water from flowing back.
Ask whether their own employees do the work, whether the warranty transfers to a future owner, whether you get an itemized written quote, what their NJ registration number is, and how much deposit they require. The answers reveal how the company operates.
High-pressure sales tactics, vague or verbal-only pricing, no transferable warranty, subcontracted labor, a large upfront or cash-only deposit, and no 13VH registration number. Any one of these is a reason to slow down.
A modest deposit with the balance due when the work is finished is normal. Be cautious if a company wants most of the money up front or insists on cash. In New Jersey you also have a three-business-day right to cancel a home improvement contract after signing.
Yes. A documented, warrantied dry basement removes a common buyer objection and can help the sale. If the warranty transfers to the new owner, that protection carries real value on paper.
Compare the same scope, not just the price. Confirm each quote includes drainage, a sump pump, a backup, and a warranty, then check what a cheaper quote leaves out. A low number often means a smaller job or a weaker warranty.
Not usually. The lowest bid often skips the sump backup, uses a patch-only fix, or comes with a limited warranty. Compare what each quote includes and what it protects, then decide on value rather than price alone.
