Street Water Flooding Your Driveway? What to Do

Key takeaways

Street water reaches a garage when the driveway, or the approach at the street, sits lower than the gutter's overflow level.
The driveway approach between the sidewalk and the street is usually city right-of-way; changes to it are city business.
Irving has rebuilt a driveway approach on Rochelle Road specifically to keep stormwater in the right-of-way.
A channel drain at the garage apron only helps if its pipe can reach a lower outlet or a pump.

When street water floods a driveway, first protect the garage during the storm, then find out whether the gutter is blocked, undersized or simply higher than your drive. The driveway approach at the street is usually city right-of-way, so the city has a say in the fix. Rein Irving Drainage Company can add a channel drain on your side, but it needs a lower outlet or a pump.

During a storm: what to do now

Move cars and anything on the garage floor that water could damage. Lift boxes onto shelves.
Clear the street inlet if it is safe. Leaves and trash on the grate of a nearby storm inlet are a common cause. Never step into moving water or reach into an open inlet.
Put sandbags or water barriers across the garage door if water is only a few inches deep. They slow water; they do not seal it out.
Record it. Take video showing where water leaves the street, how deep it gets and how long it lasts. This is the evidence the city will ask for.
Note the rainfall. A flood in a small storm points to a blockage; one only in the biggest storms may be the street system at its limit.

Why street water runs up a driveway

A street is part of the storm drainage system. Curbs and gutters carry water to inlets, and in a heavy burst the gutter can fill above the curb line. Irving’s 2-year storm is 1.77 inches in one hour by NOAA Atlas 14; the 100-year storm is 3.66 inches in an hour. When the gutter is full, water follows any path lower than the curb top.

A driveway approach is designed to rise from the gutter to the sidewalk, so water stays in the street. Problems start when:

Cause	What you see
Inlet blocked by leaves or trash	Water backs up in the gutter even in moderate rain
Approach worn, settled or rebuilt too low	The lip at the gutter no longer holds water back
Driveway slopes down from the street to the garage	Water that crosses the approach runs straight to the door
Street repaved and raised over time	The gutter sits higher relative to the drive than it once did
Street system undersized for the area	Flooding in big storms along the whole block
Creek or channel backing up	Water rises from a channel, not just the gutter

The last case is a floodplain question, not a driveway one. See floodplain or drainage problem.

The approach is city right-of-way

The strip between your property line and the street, usually including the sidewalk and the driveway approach, belongs to the city. That means:

You generally cannot raise, regrade or rebuild the approach without city approval.
A curb core or pipe through the curb is also work in the right-of-way. Coppell, for example, issues residential curb cores for yard drains as a permit with a $100 fee.
If the approach or a public inlet is the cause, the city may be the party that fixes it.

The City of Irving has rebuilt a driveway approach on Rochelle Road specifically to keep stormwater in the right-of-way. That project shows the approach is where this problem is often solved, and that the city treats it as its business. For Irving addresses we confirm the rule per address. The permits guide covers right-of-way work in nearby cities.

Call the city first

Before spending money on your side, report the problem to the city that maintains your street. Give the address, dates, rainfall if you know it, and your photos or video. Ask:

Is the nearby inlet blocked or due for cleaning?
Is the approach at your address built to the city’s current standard?
Are there known drainage problems on the street, or planned work?

In Dallas, the Floodplain Management section at 214-671-2219 makes site visits for flooding and drainage problems. In Fort Worth, stormwater customer service is 817-392-6261.

What you can do on your side

A channel drain at the apron

A channel drain, a long grated trench set across the driveway, can catch water before it reaches the garage. It is usually placed at the garage apron, where the driveway flattens out. But a channel drain only moves water: its pipe has to carry that water somewhere lower.

If the yard falls away from the driveway to a side yard, swale or rear alley, a solid pipe can carry the water there by gravity.
If the driveway is the lowest point on the lot, and lower than the street gutter, there is no gravity outlet. The water has to be pumped, which means an exterior sump with a discharge line to an allowed outlet.
A channel sized only for rain on the driveway will be overwhelmed by a gutter overflowing up the drive. Sizing has to account for both.

A traffic-rated grate is needed anywhere cars cross. The French drain versus trench drain guide explains why a French drain is the wrong tool for paving.

Other measures

A small raised lip at the garage, on your own property, helps where water arrives an inch or two deep.
A threshold seal at the door bottom reduces seepage.
Keeping roof water off the drive with buried downspouts.
Fixing an old, clogged drain line that once carried driveway water; see drainage repair.
Regrading beside the drive so the yard does not add water to it; see yard grading.

What it costs

As a national budgeting range, a channel drain runs about $700 to $2,500. A pump, a long outlet run or cutting and replacing more concrete pushes a job higher. The channel drain cost guide breaks that down.

Next step

Report it to the city, try the drainage assessment, then send a photo or video taken during rain with your address. We can check whether a channel drain has a workable outlet before anyone cuts concrete.

Questions people ask

Who do I call when the street gutter overflows into my driveway?

The city that maintains the street. Report the address, when it happens and photos of the water, and ask whether the storm inlet nearby is blocked or undersized. In Dallas, the Floodplain Management section at 214-671-2219 makes site visits for flooding and drainage problems.

Can I raise the end of my driveway to keep street water out?

Not on your own if the raised part is in the right-of-way, which the approach usually is. A change there needs the city's approval, and a hump that pushes water onto a neighbor's driveway creates a new problem.

Will sandbags at the garage door help?

As a temporary measure during a storm, yes, if water is only a few inches deep. They slow water rather than seal it out, so move cars and stored items off the floor as well.

What can you do about street water flooding your driveway?