Exterior Basement Waterproofing in Annapolis, MD to Keep Water Off the Wall
We waterproof basement walls from the outside in Annapolis. Exterior waterproofing stops water before it reaches the foundation wall: we dig down along the wall, repair and coat it, and set drainage at the base so water goes around the house, not into it. Call Annapolis MD Basement Waterproofing at 123-456-7890 for a free estimate.
HomeGuide's 2026 national guide lists exterior waterproofing as work that uses grading, drains and membranes. We start with the cheaper fixes outside the wall and move to excavation when the wall needs it.
What We Do for Exterior Waterproofing in Annapolis
We regrade and redirect water away from the wall
The EPA's guide to mold and moisture says to make sure the ground slopes away from the building foundation. HomeGuide says regrading is occasionally enough on its own and puts it at $1,000 to $5,000. We check the grade and the downspouts first, because a slope that leads to the wall feeds the problem. Why is my basement wet
We install exterior drains at the footing
HomeGuide says exterior drains catch water before it reaches the foundation walls and require excavating around the perimeter. We set the drain at the base of the wall and run it to a place the water can leave.
We apply a waterproof membrane to the foundation wall
A membrane forms a barrier between the foundation and the surrounding soil. HomeGuide notes that applying one also requires excavating around the perimeter. We clean and repair the wall before the membrane goes on.
We fix cracks and joints in the wall as we dig
With the wall exposed, we repair the cracks and joints that let water in. Basement leak and crack repair
Work is performed by independent professionals. Every project starts with an inspection and a written price before any work begins.
How We Do Exterior Waterproofing
First, we inspect the basement and the outside of the house, marking the wall sections that show water and checking the gutters, downspouts and grade. Second, we write the plan with the length of wall, the drain, the membrane and the price. Third, we confirm what permits and approvals apply to your address. Finally, we dig, repair, coat and drain the wall, backfill and walk the finished work with you.
When Exterior Waterproofing Fits
Exterior work fits when water is pressing through the wall itself and the outside of the house can be reached. HomeGuide says combining methods raises the total, and that interior options usually cost less than excavation-based exterior work. Many basements need only part of the work, and we tell you which part. Interior vs exterior waterproofing
Exterior Work on Older Annapolis Homes
Census Bureau figures (American Community Survey, 2020-2024) show about 14% of occupied Annapolis homes were built in 1939 or earlier and about 59% were built before 1980. Exterior projects in the Annapolis Historic District still need a certificate of approval under Chapter 21.56 of the City Code, according to the City of Annapolis permit page, even where a building permit is not required. We confirm the rules for your address before we dig. Waterproofing older Annapolis homes
What Exterior Waterproofing Costs in Annapolis
HomeGuide's national guide (written January 23, 2026) puts the average cost of exterior waterproofing at $10,000 to $18,000. It lists an exterior French drain at $30 to $90 per linear foot with installation, downspout replacement at $220 to $625 and regrading at $1,000 to $5,000. It names the foundation type, the size of the basement, the severity of the problem and the method among the cost drivers.
Those are national averages, not Annapolis quotes. The length of wall, the depth of the excavation and what is built against the foundation set the price for a specific home. What basement waterproofing costs in Annapolis
Frequently Asked Questions
Is exterior waterproofing better than interior?
Not always. Exterior waterproofing keeps water from reaching the wall, and it means digging down around the foundation. Interior drainage manages water after it gets in and usually costs less. We look at where the water enters and how much of the house can be reached before we recommend one or both.
Do you have to dig up the whole foundation?
Not always. HomeGuide says exterior drains and membranes require excavating around the perimeter. We dig the sections of wall that need work, and the plan shows which sections.
Can regrading alone fix a wet basement?
Sometimes. HomeGuide says regrading is occasionally enough on its own, at $1,000 to $5,000. We check the slope, gutters and downspouts on every inspection and fix those first when they are the cause.
Do I need a permit for exterior waterproofing in Annapolis?
It depends on the work and the address. The City of Annapolis permit page lists altering or repairing a building among the work that needs a permit (City Code 17.12.022), and exterior projects in the Historic District still need a certificate of approval (Chapter 21.56). We confirm what applies to your house before work starts.
How much does exterior waterproofing cost?
HomeGuide's January 2026 national guide puts it at $10,000 to $18,000 on average, with exterior drains at $30 to $90 per linear foot. Those are national averages, not Annapolis quotes. An on-site inspection gives the number for your house.
Get a Free Estimate for Exterior Basement Waterproofing in Annapolis
For exterior basement waterproofing in Annapolis, call Annapolis MD Basement Waterproofing at 123-456-7890 for a free estimate. You can also reach us here, or start from our Annapolis basement waterproofing page.