Washington, DC Waterproofing & Foundation Repair

Waterproofing & Foundation Services in Washington, DC

Best Buy Waterproofing provides basement waterproofing in Washington, DC for homeowners dealing with damp walls, musty air and water on the floor after a heavy storm. Many Washington homes are older rowhouses and semi-detached houses with brick, stone or block foundations that were built long before modern drainage. Clay-heavy soil holds water against those walls, and freeze-thaw winters slowly open cracks and wear down mortar. We find where the water is coming in and fix the cause.

One in-house team handles waterproofing, foundation repair, crawl space repair, mold remediation, basement finishing and spray foam insulation, so a single crew can take care of your whole lower level. We have served homeowners since 2017 and are licensed in DC, Maryland, Virginia, Pennsylvania, Delaware and West Virginia and fully insured. Every project starts with a free inspection, and financing is available if you would rather spread the cost over time.

Our Services in Washington, DC

Basement Waterproofing

Foundation Repair

Crawl Space Repair

Mold Remediation

Basement Finishing

Spray Foam Insulation

Ray Lee

6 months ago

Best Buy Waterproofing came quickly to provide a free estimate. Jay came to assess the hole in my basement slab that had a whole with the remains of a basin. He was friendly and provided an honest assessment that I didn't really need their services to just fill the hole. I had not been sure if something... Read More »

Michael Krafft

2 months ago

The entire Best Buy team was amazing from beginning to end. Rich came out to access, and he was very honest and clear as to what the process entailed. Made the decision to sign easy. The install team came out and I was astonished with the level of work and how efficiently they got things done. I’d definitely recommend Best... Read More »

Briana W

2 months ago

I contacted Best Buy Waterproofing through referral. Richard Eagan came out and did a thorough analysis of our basement area letting us know how to best waterproof it through a sub floor pressure release system with a sump pump. He even sat at our table and sketched it out for us to easily digest the process. After a little back... Read More »

Rik Kirchner

4 months ago

Best Buy Waterproofing was an absolute lifesaver for my basement! Jay, the project manager, made everything clear and put me at ease right away. He carries career long institutional masonry knowledge. Darwin and his team were top-notch—they were meticulous, incredibly tidy, and worked efficiently to install the sump pump perfectly. The whole project was finished on time, and I couldn’t... Read More »

Seth Van De Ven

a year ago

Update: the company called me immediately to address the issues I had expressed in my review, which they did in a forthright manner, which I was impressed with, as I can appreciate a company which holds itself to high standards. I had Best Buy complete two drainage systems around the inside walls of my house in my basement and in my... Read More »

5 618

Best Buy Waterproofing

8950 MD-108 Suite 221, Columbia, MD 21045, USA

Basement & Foundation Problems We Solve in Washington, DC

Much of Washington’s housing is older rowhouses and semi-detached homes with brick, stone or block foundations, often on tight lots with shared party walls. Clay-heavy soil, heavy summer storms and freeze-thaw winters put steady pressure on those basements year after year.

Water in the Basement After Storms

Heavy summer storms can drop a lot of rain in a short time, and clay soil drains slowly. Water builds up against the foundation and pushes through cracks, mortar joints and the joint where the wall meets the floor. An interior drainage system with a sump pump, or exterior waterproofing where there is room to dig, carries that water away from your basement. Basement waterproofing in Washington, DC →

Leaking Brick and Stone Walls

Older Washington foundations are often brick or stone laid in mortar. As the mortar wears, water finds more paths inside and the wall can loosen. We check the condition of the masonry, seal active leaks and recommend structural repair if a wall has started to lean or bulge, so the waterproofing has something solid to work with. Foundation repair in Washington, DC →

Bowing and Cracked Foundation Walls

Clay soil swells when it gets wet and presses against basement walls, and every freeze adds more force. Over time that can cause horizontal cracks, stair-step cracks in block and walls that tip inward. Carbon fiber straps or steel wall braces can stabilize a bowing wall, and a badly damaged block wall can be rebuilt. Wall stabilization in Washington, DC →

Settling Floors and Sticking Doors

Sloping floors, doors that stick and cracks running from window corners can point to a foundation that is settling. Soil that swells and shrinks with the seasons can leave gaps under footings. Piers installed beneath the foundation transfer the weight of the house to more stable soil and help keep it from sinking further. Settling foundation repair in Washington, DC →

Damp Crawl Spaces and Musty Air

Additions and older homes in the District often sit over a dirt or vented crawl space. Humid summer air gets in, condenses on cool wood and can lead to mold, sagging floors and musty smells upstairs. Encapsulation with a sealed vapor barrier and dehumidification keeps the crawl space dry and helps protect the air you breathe. Crawl space repair in Washington, DC →

How It Works

Free Inspection

A specialist visits your Washington, DC home and finds the source of the problem.

Your Recommendation

We walk you through what we found and the solution we recommend for your home.

Expert Installation

Our own crew completes the work, including any permits your project needs.

Warranty Protection

Your repair is backed by a transferable warranty.

What Affects the Cost of Waterproofing & Foundation Repair?

No two Washington, DC homes are the same, so we don’t quote from a price list. After a free inspection you get a firm price for your home.

Source of the Problem

Surface water, groundwater pressure and plumbing leaks each call for a different fix.

Size of the Area

How many walls, how many linear feet, and how much of the space is affected.

Foundation Type

Poured concrete, block, brick and stone foundations are repaired differently.

Structural Condition

Cracks, bowing or settling may need stabilization along with waterproofing.

Access & Finished Space

Finished walls, flooring, tight crawl spaces and landscaping affect the work.

Equipment Needed

Sump pumps, battery backups, dehumidifiers and drainage add-ons.

Washington, DC Basement & Foundation FAQs

Do you work on DC rowhouses with shared walls?

Yes. Rowhouses and semi-detached homes are a big part of our work in Washington. Shared party walls, tight lots and alley access change how we plan a job. Interior waterproofing is often the practical choice in a rowhouse because it is installed from inside the basement, without digging along a neighbor’s wall.

Can you waterproof an English basement I want to rent?

Yes. Many Washington homeowners want to rent or finish an English basement, and a dry space is the first step. We find where water is getting in, fix it with the right waterproofing system and can then finish the space with moisture-resistant walls, flooring and lighting. When a permit is required, we handle it.

Should I choose interior or exterior waterproofing?

It depends on where the water is coming from, how much room there is around the house and the condition of the foundation. Interior systems collect water at the base of the wall and send it to a sump pump. Exterior waterproofing seals the outside face of the wall. After the free inspection, we explain which option fits your home.

How do I know if a foundation crack is serious?

Thin vertical cracks can come from normal concrete curing, though they may still leak. Horizontal cracks, stair-step cracks in block or brick and cracks that keep widening often point to soil pressure or settling. If you see any of these, schedule a free inspection so we can explain the cause and the repair.

How much does basement waterproofing cost in DC?

We do not quote from a price list, because every home is different. Basement size, foundation type, access and the system your home needs all affect the price. You get a firm price after a free inspection, and we walk you through what we found and what we recommend. Financing is available.

Is your warranty transferable?

Yes. Our work comes with a transferable warranty, so if you sell your home, the protection can pass to the next owner. Buyers in Washington often want to know a basement has been properly repaired, and the warranty helps show that. We go over the warranty details with you before any work begins.

Areas We Serve in and Around Washington, DC

We work in neighborhoods across Washington, DC and in nearby communities in Maryland and Northern Virginia.

Serving all of Washington, DC

Nearby service areas

Get a Free Inspection in Washington, DC

If your Washington basement is wet, cracked or musty, we can help. Call (844) 980-3707 to schedule a free inspection, and we will walk you through what we found and what we recommend. Financing is available.

Washington, DC Basement Waterproofing & Foundation Repair