How Do You Improve Drainage Around Your Foundation?
Most homeowners can significantly improve their foundation‘s drainage situation with DIY improvements before professional drainage work is needed.
Extend Downspouts
Every downspout on the home should discharge at least 4 to 6 feet from the foundation. A downspout terminating 12 inches from the foundation during a 1-inch rainstorm deposits hundreds of gallons of water directly at the wall in a single event. Downspout extensions (flexible corrugated pipe extensions: $9 to $15 each at hardware stores) connect to the existing downspout and extend the discharge point away from the home. A pop-up emitter (a $20 device that sits flat on the ground and opens to discharge during flow, then closes to prevent debris entry): the preferred terminus for a downspout extension that routes water away from planting beds. For downspouts that are difficult to extend above grade: underground downspout piping (a PVC pipe buried from the downspout to a daylight point 10 to 20 feet from the home) provides a permanent, invisible solution at $150 to $350 per downspout. (For more on this, see Downspout Drainage Solutions: Protecting Your Foundation.)
Correct Negative Grade
Inspect the grade around your home’s perimeter: pour a cup of water along the foundation and observe which direction it flows. Any area where water flows toward the foundation rather than away from it: negative grade that should be corrected. Correction: add topsoil and compact it to create a minimum 6-inch drop in the first 10 feet from the foundation. Avoid adding organic material (mulch, compost) directly against the foundation as a grade correction — organic material holds moisture rather than draining it. Use clean topsoil or crushed stone for grade correction areas adjacent to the foundation wall.
Window Well Drainage
A below-grade window well that fills with water during rain events is a direct water entry point into the basement. Prevention: clean window well drains annually (the drain at the bottom of the well connects to the footing drain or to gravel — clear it of leaves and debris). Install a window well cover (a transparent polycarbonate or metal cover that prevents rain water from entering the well while allowing light and emergency egress): $30 to $160 per well. For window wells without a drain or with a clogged drain: a gravel-filled well (replace the soil in the well with clean gravel to the top of the existing footing) provides temporary drainage improvement until a proper drain is installed.
Working With a Contractor on This Project
Getting the right outcome on any home services project starts before the work begins. A few consistent practices make the difference between a smooth project and a frustrating one.
Get at least two or three quotes. A single quote gives you no basis for comparison. Two or three quotes reveal the market rate for the work, expose scope differences between bidders, and let you assess contractor communication quality before any commitment is made. The lowest bid is not automatically the best value if the scope is thin or the materials are underspecified.
Ask for licenses and insurance before work starts. Verify current general liability insurance and, for any work involving workers on your property, workers compensation coverage. Licensing requirements vary by state and trade; confirm the specific requirements in your jurisdiction. A licensed contractor who carries appropriate insurance protects both parties if something goes wrong during the project. (For more on this, see Questions to Ask Before Installing a Foundation Drainage System.)
Get the scope in writing. A written proposal that specifies materials, labor scope, timeline, what is included (permits, cleanup, disposal), and warranty terms is the foundation of a professional engagement. Verbal agreements on any of these points invite misunderstanding. For any project over $500, written scope is non-negotiable.
Clarify the payment schedule upfront. A reasonable payment schedule ties major payments to project milestones: a deposit at signing, a payment at material delivery or project start, and a final payment at completion after a walkthrough confirms satisfaction. A contractor who requires full payment upfront before work begins is a red flag in any trade.
Making a Confident Decision
The information in this article is designed to help you ask better questions of the professionals you work with, evaluate their answers with more confidence, and understand the decisions involved in this type of home services project. It is not a substitute for professional assessment of your specific home. (For more on this, see Questions to Ask a Foundation Drainage Contractor.)
Every home is different. Roof slopes, local weather, tree exposure, soil conditions, and existing system condition all affect what the right solution is for your specific situation. The general principles here apply broadly, but a professional who assesses your home in person will give you guidance that accounts for the details that general articles cannot.
When you are ready to move forward, getting at least two or three quotes from licensed, insured, local contractors is the most important practical step. It lets you compare approaches, assess contractor quality, and confirm that the solution proposed matches your specific situation and budget.
Cost figures on this page were checked against published pricing on August 29, 2026. How we source cost data.
