This article is brought to you by AskBobCarr.com — Maryland’s trusted resource for honest drainage pricing, backyard transformations, and real-life solutions from Bob Carr and the TLC team.
If water’s been a problem in your yard for years — soggy grass, standing water, a musty basement, maybe even erosion or dead patches — you’ve probably wondered: What’s it really going to cost to fix all of this?
We get this question every week at AskBobCarr.com. So let’s break it down, plain and simple. Here’s what goes into a full drainage overhaul, what it costs in Maryland (as of 2024–25), and how to know if you’re getting a fair deal.
What Is a Full Drainage Overhaul, Exactly?
We define a full-property drainage overhaul as a system that includes: – Multiple drainage elements: like French drains, dry wells, downspout rerouting, and regrading – Soil corrections: to improve how water moves through your lawn and landscape – Long-term protection: for foundations, patios, basements, and crawl spaces
Most homeowners need this when: – Surface water stands for more than 24–48 hours after rain – Sump pumps run constantly – Yard feels spongy or uneven – Gutters and downspouts dump near the home – Prior drainage attempts haven’t worked
This isn’t just about redirecting water — it’s about transforming how your entire yard works, above and below the surface.
The Short Answer: What It Usually Costs
In Maryland, a full drainage overhaul typically runs between $8,000 and $18,000, depending on the size of your property, slope, soil, and how many water problems you’re solving.
But we’ve also done: – Smaller jobs around $5,000 (tight lots, simple installs) – Larger estate projects over $25,000 (multi-acre properties or major regrading)
What’s included in that range? Let’s walk through it.
What Drives the Cost?
1. How Much Water You’re Moving
More water = more pipe, bigger catch basins, larger outlets. A 2,500 sq ft roof can produce over 1,500 gallons of runoff in a single storm. That water has to go somewhere — and the system must be sized to handle it.
2. Slope, Access, and Soil Type
- Flat or reverse-sloped yards require careful grading and extra design.
- Clay-heavy soil drains slowly and often needs trenching and aeration.
- Fenced-in yards, tight side yards, or backyards with no machine access increase labor costs.
3. Number of Drainage Zones
Most properties aren’t just one issue. We often break yards into zones: – Roof runoff management (downspouts, splash zones) – Lawn or surface runoff – Patio/deck drainage – Foundation moisture control
Each zone needs its own plan and exit path.
4. Finishes and Restoration
Some homeowners want us to restore sod, rebuild mulch beds, or add stone borders. Others prefer to handle landscaping themselves to save money.
Ask about partial vs. full restoration options — it can shift pricing by thousands.
What’s Included in a Professional Overhaul (With AskBobCarr.com)
When we say “drainage overhaul,” we mean a complete, turnkey solution. Here’s what we include:
✔️ Full Site Evaluation
We walk your yard in person and watch how water flows (especially after rain). We take laser slope readings, check soil conditions, and identify the lowest, most vulnerable points.
✔️ Zone-by-Zone Drainage Plan
We divide your yard into specific drainage zones and design separate collection and exit routes for each. That’s what keeps the system reliable during storms.
✔️ Trenching and Pipe Installation
Depending on your soil, slope, and needs, we install solid and/or perforated pipes, filter fabric, gravel bases, and drainage exits like pop-up emitters, dry wells, or curb cutouts.
✔️ Downspout Rerouting
We bury all downspouts and direct them at least 10 feet away — usually more. We combine downspouts when possible to save trenching and reduce cost.
✔️ Dry Wells and Overflow Protection
These underground basins allow water to soak in slowly if the main outlet is overwhelmed. We add them when needed — especially in flat or tight yards.
✔️ Grading, Soil Restoration, and Cleanup
We regrade around the foundation, flatten lawn ruts, and replace or amend topsoil. In most cases, we repair sod, mulch, or hardscaping as needed.
✔️ Flow Testing and Final Walk-Through
We test every exit point, every emitter, and every slope before we leave. If it doesn’t drain, we don’t call it done.
Real Maryland Example #1: Bowie, MD
Scope: – 3 downspouts rerouted and buried – Backyard French drain installation – Dry well and gravel recharge bed – 2,500 sq ft of regrading and soil leveling
Total Cost: $12,300
Result: Water now drains within 12 hours. Basement smells cleaner, and lawn is usable again after storms.
Real Maryland Example #2: Severna Park, MD
Scope: – Soggy backyard from sloped neighbor runoff – Installed swale, pop-up emitters, and soil berm – Rebuilt mulch bed with stone border
Total Cost: $9,700
Result: Runoff now flows around the house. No more standing water near patio. Lawn stays firm even after 2”+ storms.
Real Maryland Example #3: Bethesda, MD
Scope: – Tight side yard with poor access – Hand-dug French drain system – Deck drainage issue resolved with micro-trenches
Total Cost: $7,800
Result: Foundation wall now dry. Dehumidifier runs half as often. Side yard now usable.
Cost-Saving Tips Without Cutting Corners
- Phase your project. Start with the worst zones (usually foundation drainage or backyard flooding) and expand later.
- Choose sod restoration selectively. You can reseed yourself or tackle the landscaping after.
- Simplify pipe layouts. One longer run with cleanouts may be cheaper than several short ones.
- Do seasonal installs. Winter and early spring tend to be less booked, and we may offer seasonal pricing.
- Bundle projects. If you’re doing lighting or patio work, ask about joint trenching.
What Should You Ask Before Saying Yes?
Use these questions to compare bids:
- “How many linear feet of pipe are you including?”
- “Will you be trenching by hand or machine?”
- “Where does my water go after it leaves the pipe?”
- “Are you correcting slope or just digging trenches?”
- “Do you test everything before you finish?”
You deserve transparency. A vague quote now becomes a surprise cost later.
Red Flags to Watch For
- ❌ No slope or laser measurements
- ❌ No clear outlet or discharge plan
- ❌ Generic pricing with no material details
- ❌ No soil prep or fabric under the pipe
- ❌ No cleanup or yard restoration
We’ve been called to fix more than a few jobs that skipped these steps.
Final Thoughts From Bob
If you’re tired of bandaid fixes… if water keeps coming back… if your basement, lawn, or patio never fully dries out…
You don’t need another quick fix. You need a system.
One that’s designed for your home, your soil, and your weather — and built to last for decades.
At AskBobCarr.com, we give you: – Full transparency – Zone-by-zone solutions – Maryland-tested materials – Real pricing — and no pressure
📞 Call (410) 721-2342 or schedule your free full-property evaluation at AskBobCarr.com
Let’s take care of it once, so you never have to worry again.