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  • Verified reviews icon108
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Find Foundation repair specialists in Adelphi

Avatar for Basement Gurus, LLC

Basement Gurus, LLC

4.85(
157
)
Approved Pro

Basement Gurus, LLC

4.85(
157
)
Approved Pro
Customers say: Quality work
16 years of experience
Free onsite estimate

Basement Gurus LLC, is a locally owned and operated company with over 20 years of experience. We specialize in professional waterproofing services. Our commitment is 100% guaranteed customer satisfaction on every project. Call us today, so that we can give you a free estimate and make your project come to life!

"Josh, the representative from Basement Gurus was outstanding! We had experienced a water issue in our finished basement. Josh thoroughly examined the interior and exterior of the home and determined that the leak might be plumbing related. Josh could have very easily exploited our ignorance and suggested a solution purely beneficial to his company that may not have addressed the underlying cause of the problem. Instead, he demonstrated his integrity by realistically assessing the situation even if it would jeopardize the sale. This is commendable particularly in this era where cutthroat business practices are commonplace. I highly recommend Basement Gurus. They are fortunate to have an employee like Josh who exhibits concern for the customer at such a high level. "

Don I on January 2026

Basement Gurus LLC, is a locally owned and operated company with over 20 years of experience. We specialize in professional waterproofing services. Our commitment is 100% guaranteed customer satisfaction on every project. Call us today, so that we can give you a free estimate and make your project come to life!

"Josh, the representative from Basement Gurus was outstanding! We had experienced a water issue in our finished basement. Josh thoroughly examined the interior and exterior of the home and determined that the leak might be plumbing related. Josh could have very easily exploited our ignorance and suggested a solution purely beneficial to his company that may not have addressed the underlying cause of the problem. Instead, he demonstrated his integrity by realistically assessing the situation even if it would jeopardize the sale. This is commendable particularly in this era where cutthroat business practices are commonplace. I highly recommend Basement Gurus. They are fortunate to have an employee like Josh who exhibits concern for the customer at such a high level. "

Don I on January 2026


Avatar for S&S Waterproofing And Foundation Repair

S&S Waterproofing And Foundation Repair

5.00(
37
)
Approved Pro

S&S Waterproofing And Foundation Repair

5.00(
37
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
16 years of experience

At S&S Waterproofing we have over 25+ years of combined experience in Waterproofing and foundation repair. We never use sub-contractors and aren't a franchise owned company that uses high pressure sales tactics. We are a certified foundation repair specialist and install hydraulic push piers and helical piers. We offer a lifetime transferable warranty and free inspections.

"Steve was great to work with - knowledgeable, flexible with scheduling, and always available to answer questions. His crew was courteous and efficient. We are very happy with the results. Highly recommend!"

Nadine T on January 2024

At S&S Waterproofing we have over 25+ years of combined experience in Waterproofing and foundation repair. We never use sub-contractors and aren't a franchise owned company that uses high pressure sales tactics. We are a certified foundation repair specialist and install hydraulic push piers and helical piers. We offer a lifetime transferable warranty and free inspections.

"Steve was great to work with - knowledgeable, flexible with scheduling, and always available to answer questions. His crew was courteous and efficient. We are very happy with the results. Highly recommend!"

Nadine T on January 2024


Avatar for RPM Construction / Property Management, LLC

RPM Construction / Property Management, LLC

4.90(
69
)
Approved Pro

RPM Construction / Property Management, LLC

4.90(
69
)
Approved Pro
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
16 years of experience

RPM Construction / Property Management, LLC is your local home renovation, Remodeling and Property Management Company servicing the greater beach areas of Southern Delaware! We proudly offer our customer's a wide range of services, from bimonthly off season house checks to extensive home renovation projects. Our company prides itself on the key connections we have made with the country's leading home product suppliers, such as James Hardie, WOLF Home Products, & AZEK Building Products, Versetta Stone and more importantly, the relationship we have built with local contractors and businesses. It is important to know that all work is invoiced to our customers on a time and materials basis. Our key staff have an ownership stake in our company’s performance and your complete satisfaction. No hidden charges. It’s that simple. Interested in the RPM Team transforming your property? Contact us today for a no cost, at home consultation and come experience the Roberts' difference today! Preferred to receive inquiries through email.

"New access panel looks great ."

Lillian Powell P on June 2024

RPM Construction / Property Management, LLC is your local home renovation, Remodeling and Property Management Company servicing the greater beach areas of Southern Delaware! We proudly offer our customer's a wide range of services, from bimonthly off season house checks to extensive home renovation projects. Our company prides itself on the key connections we have made with the country's leading home product suppliers, such as James Hardie, WOLF Home Products, & AZEK Building Products, Versetta Stone and more importantly, the relationship we have built with local contractors and businesses. It is important to know that all work is invoiced to our customers on a time and materials basis. Our key staff have an ownership stake in our company’s performance and your complete satisfaction. No hidden charges. It’s that simple. Interested in the RPM Team transforming your property? Contact us today for a no cost, at home consultation and come experience the Roberts' difference today! Preferred to receive inquiries through email.

"New access panel looks great ."

Lillian Powell P on June 2024


Avatar for Best Buy Waterproofing

Best Buy Waterproofing

5.00(
41
)
Approved Pro

Best Buy Waterproofing

5.00(
41
)
Approved Pro
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
9 years of experience

Best Buy Waterproofing specializes in basement waterproofing, foundation repair, crawl space encapsulation, and mold remediation with over 30 years of proven expertise. Our certified team brings more than 60 years of combined experience and is committed to excellence with a “Whatever It Takes” approach. We’re licensed, bonded, insured, and certified—providing top-tier waterproofing backed by a comprehensive warranty on systems, pumps, and cutting-edge battery backups We offer free estimates and flexible financing options—ask about our financing plans today!

"Ed fixed the problem 2 thumbs up!"

Pete H on December 2025

Best Buy Waterproofing specializes in basement waterproofing, foundation repair, crawl space encapsulation, and mold remediation with over 30 years of proven expertise. Our certified team brings more than 60 years of combined experience and is committed to excellence with a “Whatever It Takes” approach. We’re licensed, bonded, insured, and certified—providing top-tier waterproofing backed by a comprehensive warranty on systems, pumps, and cutting-edge battery backups We offer free estimates and flexible financing options—ask about our financing plans today!

"Ed fixed the problem 2 thumbs up!"

Pete H on December 2025


Avatar for Basement Waterproofing Nationwide Inc

Basement Waterproofing Nationwide Inc

4.81(
141
)
Approved Pro

Basement Waterproofing Nationwide Inc

4.81(
141
)
Approved Pro
Customers say: Super punctual
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
39 years of experience

Founded in 1987, Steve Taylor was passionate about providing homeowners with an honest approach to basement waterproofing and delivering exceptional customer service for every job. BWN swiftly built a reputable, trusted brand spanning across Maryland and Delaware. Today, as we look back over 35 years of business, our employee dedication and steadfast customer loyalty continue to fuel BWN’s success. This is best demonstrated by BWN’s abundant referral business and 55,000+ customers.

"Quick, efficient, super communication, great cleanup. Highly recommend."

Ellen H on October 2022

Founded in 1987, Steve Taylor was passionate about providing homeowners with an honest approach to basement waterproofing and delivering exceptional customer service for every job. BWN swiftly built a reputable, trusted brand spanning across Maryland and Delaware. Today, as we look back over 35 years of business, our employee dedication and steadfast customer loyalty continue to fuel BWN’s success. This is best demonstrated by BWN’s abundant referral business and 55,000+ customers.

"Quick, efficient, super communication, great cleanup. Highly recommend."

Ellen H on October 2022


Avatar for NV Waterproofing & Foundation Repair

NV Waterproofing & Foundation Repair

4.79(
112
)
Approved Pro

NV Waterproofing & Foundation Repair

4.79(
112
)
Approved Pro
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
40 years of experience

Established in 1986, NV Waterproofing provides expert solutions for below-grade moisture control, prevention, concrete repair, and foundation repair in the greater Washington, D.C. area. Call us at (703)690-3889 to schedule your appointment. Our certified applicators use the industry's most effective and eco-friendly waterproofing, drainage, concrete, and foundation repair products, offering a one-stop solution for your needs. Trusted by hundreds of homeowners, contractors, and builders, our reputation is built on word-of-mouth referrals. We pride ourselves on excellent customer service and stand behind our work. As members of Supportworks and Contractor Nation, our goal is to create satisfied customers. Service areas include D.C., Virginia (Fairfax, Loudoun, Prince William, Fauquier, Arlington, Alexandria, Stafford, Spotsylvania), and Maryland (Montgomery, Frederick, Prince George, Howard, St. Mary’s).

"Mark and his crew were terrific. Professional all the way. Pleasure working with them. Will use them again."

Jack P on October 2025

Established in 1986, NV Waterproofing provides expert solutions for below-grade moisture control, prevention, concrete repair, and foundation repair in the greater Washington, D.C. area. Call us at (703)690-3889 to schedule your appointment. Our certified applicators use the industry's most effective and eco-friendly waterproofing, drainage, concrete, and foundation repair products, offering a one-stop solution for your needs. Trusted by hundreds of homeowners, contractors, and builders, our reputation is built on word-of-mouth referrals. We pride ourselves on excellent customer service and stand behind our work. As members of Supportworks and Contractor Nation, our goal is to create satisfied customers. Service areas include D.C., Virginia (Fairfax, Loudoun, Prince William, Fauquier, Arlington, Alexandria, Stafford, Spotsylvania), and Maryland (Montgomery, Frederick, Prince George, Howard, St. Mary’s).

"Mark and his crew were terrific. Professional all the way. Pleasure working with them. Will use them again."

Jack P on October 2025


Avatar for JES Foundation Repair

JES Foundation Repair

4.49(
276
)
Approved Pro

JES Foundation Repair

4.49(
276
)
Approved Pro
Customers say: Super punctual
33 years of experience
Free onsite estimate

Established in 1993, JES stands as a trusted subsidiary of Groundworks, a distinguished family of companies renowned for delivering unparalleled solutions. From foundation repair, structural reinforcement, crawl space encapsulation, basement waterproofing, and concrete lifting, we provide comprehensive services tailored to meet your needs. With our coverage spanning across the state of Virginia and Maryland, we bring our local expertise closer to you. JES proudly holds accreditation from the Better Business Bureau, a testament to our unwavering commitment to excellence. Drawing from decades of collective experience, extensive industry knowledge, and ongoing specialized training, our dedicated team is poised to safeguard your residential property against water damage, concrete sinking, and foundation instability. At JES, we are not just builders; we are guardians of your peace of mind. Contact us today for a FREE estimate! 410516000653 (DC) | 50637 (MD) | WV027473 (WV)

"Worst experience ever. Unresponsive, unwilling to complete the work, no communication among the different teams which came to the house to do the work, lying every time I talked with person who gave me the estimate and signed the contract with, lying by a supervisor, and more ? Horrible company."

George K on January 2026

Established in 1993, JES stands as a trusted subsidiary of Groundworks, a distinguished family of companies renowned for delivering unparalleled solutions. From foundation repair, structural reinforcement, crawl space encapsulation, basement waterproofing, and concrete lifting, we provide comprehensive services tailored to meet your needs. With our coverage spanning across the state of Virginia and Maryland, we bring our local expertise closer to you. JES proudly holds accreditation from the Better Business Bureau, a testament to our unwavering commitment to excellence. Drawing from decades of collective experience, extensive industry knowledge, and ongoing specialized training, our dedicated team is poised to safeguard your residential property against water damage, concrete sinking, and foundation instability. At JES, we are not just builders; we are guardians of your peace of mind. Contact us today for a FREE estimate! 410516000653 (DC) | 50637 (MD) | WV027473 (WV)

"Worst experience ever. Unresponsive, unwilling to complete the work, no communication among the different teams which came to the house to do the work, lying every time I talked with person who gave me the estimate and signed the contract with, lying by a supervisor, and more ? Horrible company."

George K on January 2026


Avatar for JES Foundation Repair

JES Foundation Repair

4.54(
431
)
Approved Pro

JES Foundation Repair

4.54(
431
)
Approved Pro
Customers say: True professional
33 years of experience
Free onsite estimate

JES Foundation Repair (JES), A Groundworks Company, specializes in helping homeowners with their foundation repair, basement waterproofing, crawl space encapsulation, and concrete needs. Our top priority is providing high-quality home repair solutions and personalized service across Virginia and Maryland. With fully trained technicians, industry-leading products, and nationally backed warranties, JES is here to restore your foundation or crawlspace.

"After having a horrible experience with Andre and filing a complaint with the GM for the area, results still remain to be seen. So professionalism is non-existent and follow-thru still hasn't happened. The word of the GM, contractor supv as well as the actual contractors/engineers are garbage. Character by way of integrity and keeping their word is definitely not available with this company. Don't believe anything they say."

Sa B on August 2025

JES Foundation Repair (JES), A Groundworks Company, specializes in helping homeowners with their foundation repair, basement waterproofing, crawl space encapsulation, and concrete needs. Our top priority is providing high-quality home repair solutions and personalized service across Virginia and Maryland. With fully trained technicians, industry-leading products, and nationally backed warranties, JES is here to restore your foundation or crawlspace.

"After having a horrible experience with Andre and filing a complaint with the GM for the area, results still remain to be seen. So professionalism is non-existent and follow-thru still hasn't happened. The word of the GM, contractor supv as well as the actual contractors/engineers are garbage. Character by way of integrity and keeping their word is definitely not available with this company. Don't believe anything they say."

Sa B on August 2025


Avatar for Allmaster Home Services

Allmaster Home Services

4.85(
31
)
Approved Pro

Allmaster Home Services

4.85(
31
)
Approved Pro
Customers say: Quality work
16 years of experience
Free onsite estimate

John has been in the home improvement industry for more than 40 years. He has spent more than 16 years training and consulting in the waterproofing and structural repair industry. He has also testified as an expert witness in both Maryland and Virginia. His honest approach and competitive pricing has gained many satisfied customers over the years.

"Have used allmaster on multiple projects and will continue to do so. Excellent work"

Adam M on April 2024

John has been in the home improvement industry for more than 40 years. He has spent more than 16 years training and consulting in the waterproofing and structural repair industry. He has also testified as an expert witness in both Maryland and Virginia. His honest approach and competitive pricing has gained many satisfied customers over the years.

"Have used allmaster on multiple projects and will continue to do so. Excellent work"

Adam M on April 2024


Avatar for Armored Basement Waterproofing

Armored Basement Waterproofing

4.98(
124
)

Armored Basement Waterproofing

4.98(
124
)
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers

We are a Family owned local business with over 20 years of experience in the Basement Waterproofing field. Our focus is quality work and an honest assessment. You will notice our attention to detail and level experience from our office staff, to our field inspector, and our installation crews. We have zero salesman on staff, just the best inspector and installation crew in the business.

"Gary arrived on time , inspected the basement and the perimeter of the house and told me that what I need is to work on the gutters and downspouts. If that doesn’t solve the issue then I should consider a French Drain and sump pump on one side of the house and that would cost me around $3500. JES tried to make me sign a contract for 32k a couple of days ago and they wanted me to basically destroy the entire finished basement on top of it. I appreciate Gary’s honesty, it’s so hard to find someone like that nowadays. I will definitely called Armored Basement Waterproofing if still needed after fixing the gutters. 100% recommended!"

Giorgia A on July 2022

We are a Family owned local business with over 20 years of experience in the Basement Waterproofing field. Our focus is quality work and an honest assessment. You will notice our attention to detail and level experience from our office staff, to our field inspector, and our installation crews. We have zero salesman on staff, just the best inspector and installation crew in the business.

"Gary arrived on time , inspected the basement and the perimeter of the house and told me that what I need is to work on the gutters and downspouts. If that doesn’t solve the issue then I should consider a French Drain and sump pump on one side of the house and that would cost me around $3500. JES tried to make me sign a contract for 32k a couple of days ago and they wanted me to basically destroy the entire finished basement on top of it. I appreciate Gary’s honesty, it’s so hard to find someone like that nowadays. I will definitely called Armored Basement Waterproofing if still needed after fixing the gutters. 100% recommended!"

Giorgia A on July 2022

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Foundation Repair questions, answered by experts

Mudjacking is usually reserved for light-duty slabs, like patios, driveways, and sidewalks. However, it can be an effective way to lift garage slabs and concrete around the perimeter of the home, which could harm your foundation if it’s not done properly. The risk of damage is why having a professional mudjacking company carry out the work is important. This type of slab or foundation repair is relatively inexpensive, especially if you consider that a DIY job requires that you pay to rent the necessary equipment.

Yes, you can live with a cracked foundation—in fact, most people do. Virtually all foundations crack from normal settlement, and while settling cracks benefit from sealing to prevent water and moisture intrusion, most aren’t an issue. If you have structural cracks in your foundation, it might be safe to live in your home for some time, but you should address them immediately to prevent structure collapse and major property damage.

There are a few ways to reinforce a pier and beam foundation, including installing additional piers and beams for added support and performing underpinning, which redistributes the weight of your home further down into the ground where frost and soil expansion don’t pose a threat to the foundation. The best option for reinforcement varies based on your particular home and the soil conditions beneath it.

The actual foundation repair costs will depend on the extent of the damage, how many blocks you need, labor costs, and material costs. As an estimate, the average repair costs for a cinder block foundation fall between $350 and $25,000. Because the range is so large, it’s important to call a professional foundation repair company and have them assess the damage and estimate the repair costs.

You can strengthen a weak foundation using a few different foundation repair methods, including underpinning, slab jacking, foam jacking, installing carbon fiber support strips, or using a sealant or epoxy crack injection. It’s worth noting that the best way to strengthen your foundation permanently is to fix the underlying issue first and then use a permanent solution to reinforce it. If you’re unsure who to call for foundation repairs, a foundation repair contractor or structural engineer can help find the best solution for your home.

The Adelphi, MD homeowners’ guide to foundation repairs

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