Request a Free Waterproofing or Foundation Repair Estimate
Free homeowner estimates for basement waterproofing, foundation repair, crawl spaces, masonry, stucco, restoration, retaining walls, Bilco doors, and drainage repairs in NJ and Eastern PA.
“Professional, responsive, and solved our basement water issue the right way.”
Tell Down Under Waterproofing what is happening at your property, and our team will help you schedule the right next step. We provide estimates for water intrusion, foundation cracks, crawl space moisture, masonry damage, stucco leaks, retaining wall concerns, Bilco doors, above-grade waterproofing, and construction restoration.
Since 2006, homeowners throughout Mercer, Monmouth, Middlesex, Somerset, Hunterdon, Morris, and Ocean counties have trusted us for diagnosis-based recommendations, clear repair plans, and professional waterproofing and structural repair work. We also consider qualifying projects in select communities in Bergen, Essex, Hudson, and Union counties, and we provide regular service in Bucks and Montgomery counties in Eastern PA and Philadelphia, PA.
Request Your Project Estimate
Use the form to tell Down Under Waterproofing what is happening at your property. The more detail you provide, the easier it is for our team to understand the issue and schedule the appropriate inspection or estimate.
Free Estimates for Homeowners
Estimates are provided to homeowners free of charge. We do not send high-pressure salespeople. Estimates are performed by experienced professionals and, when appropriate, may include drawings or input from structural engineers.
- NJ License #13VH03267600
- PA License #PA175894
- Serving primary and select project areas in New Jersey, as well as Eastern PA, since 2006
- Open Monday through Saturday, 7:00 AM to 7:00 PM
- Free written estimates with clear recommendations
Service-Area Availability
Our primary New Jersey service area includes Mercer, Monmouth, Middlesex, Somerset, Hunterdon, Morris, and Ocean counties. We also consider qualifying projects in select communities in Bergen, Essex, Hudson, and Union counties, depending on project location, scope of work, scheduling, and travel requirements.
Please note: We are not currently scheduling projects located in Newark or Elizabeth. We also serve Bucks and Montgomery counties in Eastern PA and Philadelphia, PA. Contact us to confirm availability for your property.
Prospective Buyer & Real Estate Transaction Policy
We cannot provide free estimates to prospective home buyers or participants in real estate transactions. These inspections are charged a fee of $1,000, refundable as a credit toward the contract if the prospective buyer purchases the home and has the work performed by Down Under Waterproofing.
For general questions that are not estimate requests, please use our general contact page .
Free Estimate Form
Complete the form below and our team will contact you to discuss your project and schedule the next step.
If the form does not load, call (908) 812-5040 or email support@duwaterproofing.com .
Need payment flexibility? Financing options are available through Hearth for qualifying projects. View financing options →
By submitting this form, you are requesting that Down Under Waterproofing contact you about your project.
Financing for Waterproofing, Foundation Repair & Home Improvement Projects
Important waterproofing, foundation, crawl space, drainage, masonry, and structural repairs do not always happen when the expense fits comfortably into your budget.
Down Under Waterproofing & Foundation Repair offers access to financing options through Hearth so qualified homeowners can explore personalized financing options before deciding whether financing is appropriate for their project.
What to Include in Your Estimate Request
You do not need to know the exact cause of the problem before contacting us. A clear description of what you are seeing helps us understand whether the issue is related to water intrusion, foundation movement, drainage, crawl space moisture, masonry deterioration, exterior wall leaks, or structural damage.
Where the Problem Is Happening
Basement, crawl space, foundation wall, garage, exterior wall, retaining wall, steps, chimney, stucco area, Bilco door, or masonry section.
What You Are Seeing
Water, dampness, cracks, bowing, seepage, moldy odors, rotted wood, sagging floors, failed caulking, loose mortar, or drainage problems.
When It Happens
After heavy rain, during spring thaw, during every storm, only in one corner, when the sump pump runs, or all year long.
Helpful Details
Your town, photos if available through the form, best contact information, and whether this is your home or part of a real estate transaction.
What Happens After You Request an Estimate?
Our process is designed to help homeowners understand the cause of the problem before choosing a repair. The right solution depends on how water is entering, whether structural movement is involved, and what conditions around the home are contributing to the issue.
Submit the Form
Tell us what you are seeing and where the problem is happening.
We Contact You
Our team follows up to gather details and help schedule the next step.
Inspection or Evaluation
We evaluate the moisture, structural, drainage, or repair condition.
Clear Recommendation
You receive a written estimate with repair recommendations when appropriate.
Estimate Requests We Commonly Handle
Many properties need more than one type of repair. A wet basement may involve foundation cracks. Crawl space moisture may contribute to wood rot or sagging floors. Masonry or stucco damage may be tied to water intrusion, settlement, or exterior drainage.
Basement Waterproofing
French drains, sump pumps, wall seepage, floor leaks, hydrostatic pressure, drainage, and recurring basement water.
Foundation Repair
Foundation cracks, bowed walls, settlement concerns, structural movement, and moisture-related foundation damage.
Crawl Space Encapsulation
Moisture control, vapor barriers, odors, humidity, drainage support, and crawl space protection.
Masonry Repair
Brick, block, mortar, steps, chimneys, walls, retaining walls, and masonry damage caused by water or movement.
Stucco Repair
Cracked stucco, failed EIFS, exterior wall leaks, moisture entry, failed caulking, and wall system problems.
Above-Grade Waterproofing
Water entry through exterior walls, windows, doors, penetrations, coatings, caulking joints, and building envelope weak points.
Construction Restoration
Water damage, rotted wood, sagging floors, joists, sill plates, beams, columns, and damaged building components.
Bilco Doors & Basement Entryways
Basement doors, thresholds, entryways, exterior access points, and water entry around basement openings.
Retaining Walls
Retaining wall movement, drainage concerns, soil pressure, grading issues, and exterior structural water management.
Why a Diagnosis-Based Estimate Matters
Waterproofing, foundation repair, crawl space work, masonry repair, stucco repair, and restoration all depend on the cause of the problem. A quote should not be based only on the visible symptom. The same basement leak may require a different solution depending on whether the water is coming from groundwater pressure, surface drainage, wall cracks, floor joints, exterior openings, or structural movement.
Water Source
We look at where water is entering and whether pressure, drainage, grading, or exterior conditions are contributing.
Structural Condition
We consider whether cracks, bowing, settlement, rotted framing, masonry damage, or support issues are part of the problem.
Long-Term Repair Plan
We recommend repairs designed to address the source, protect the property, and reduce the likelihood of recurring damage.
Helpful Resources Before You Request an Estimate
Ultimate Guide to Basement Waterproofing
Learn why basements leak, how water pressure develops, and what long-term waterproofing systems are designed to solve.
French Drain vs. Sump Pump
Compare two common waterproofing solutions and learn why some basements need both drainage and pumping support.
10 Common Signs Your Home Needs Foundation Repair
Review warning signs that may point to cracks, settlement, movement, structural pressure, or moisture-related damage.
Why Spring Is Dangerous for NJ & PA Basements
See how rain, thawing soil, and seasonal groundwater changes can reveal hidden basement and foundation problems.
Additional Homeowner Resources
For additional homeowner guidance, visit the EPA guide to mold, moisture, and your home , and the New Jersey Home Improvement Contractor information page .
Frequently Asked Questions About Free Estimates
Yes. Down Under Waterproofing provides free estimates to homeowners for qualifying waterproofing, foundation repair, crawl space, masonry, stucco, restoration, retaining wall, Bilco door, and drainage-related projects.
No. Estimates are handled by experienced professionals rather than high-pressure salespeople. When appropriate, the estimate may include drawings or input from structural engineers.
Include where the issue is happening, what you are seeing, when it occurs, your town, your best contact information, and whether this is your home or part of a real estate transaction.
No. Down Under Waterproofing cannot provide free estimates to prospective home buyers or participants in real estate transactions. These inspections are charged a $1,000 fee, refundable as a credit toward the contract if the prospective buyer purchases the home and has the work performed by Down Under Waterproofing.
Our primary New Jersey estimate area includes Mercer, Monmouth, Middlesex, Somerset, Hunterdon, Morris, and Ocean counties. We also consider qualifying projects in select communities in Bergen, Essex, Hudson, and Union counties, excluding Newark and Elizabeth, depending on project location, scope, scheduling, and travel requirements. We also serve Bucks and Montgomery counties in Eastern PA and Philadelphia, PA.
Yes. Financing options are available through Hearth for qualifying home improvement projects. Options may include personal loans, qualifying 0% introductory APR credit-card options, and HELOC products. The 0% introductory APR credit-card option is available for qualifying applicants with a 680+ credit score for amounts up to $15,000. View financing information →
Yes. You can call Down Under Waterproofing directly at (908) 812-5040 or email support@duwaterproofing.com .
Request Your Free Homeowner Estimate
If you are dealing with basement water, foundation cracks, crawl space moisture, masonry damage, stucco leaks, retaining wall movement, rotted wood, sagging floors, or exterior water intrusion, Down Under Waterproofing can help you understand the cause and choose the right repair plan.
Use the form above or contact Down Under Waterproofing to request help with basement waterproofing, foundation repair, crawl space encapsulation, masonry repair, stucco repair, above-grade waterproofing, restoration, retaining walls, or drainage-related repairs.
Licensed & Insured | NJ #13VH03267600 | PA #PA175894 | Bonding #72695582 | Monday through Saturday, 7:00 AM to 7:00 PM