Cleaning the Driveway Apron and Curb Line

What the apron is and why it gets so dirty

The apron is the section where your driveway slopes down to meet the street, usually crossing the public sidewalk and ending at the curb cut. It takes the hardest use of any part of the driveway: every car turns and brakes on it, street dirt gets tracked onto it, and gutter water and debris wash against its edge.

That is why aprons are often darker than the rest of the drive, with tire marks curving in from the street, oil drips where cars pause, and a line of grime along the curb. Cleaning the main slab but skipping the apron leaves the most visible part of the job undone.

In older neighborhoods the apron may also be a different pour from the rest of the driveway, poured by the city or at another time. A slight difference in color between the two can remain after cleaning, because it comes from the concrete itself rather than dirt.

Sidewalk and curb: what is yours to clean

In most LA neighborhoods the strip of sidewalk crossing your drive and the curb are public property, but homeowners commonly clean them along with their driveway, and they read as one surface from the street. A clean driveway next to a dark sidewalk strip looks unfinished.

Cleaning these areas is fine, but repair is another matter. Lifted, cracked or broken sidewalk sections and damaged curbs are not fixed by washing. If tree roots have lifted a section, cleaning can make the damage more noticeable.

Tire marks, oil and gutter grime

Tire marks on aprons come from turning on hot concrete. Rubber residue bonds to the surface, especially after hot Valley summers. They need a degreaser or a cleaner made for tire marks, dwell time, and then surface cleaning. Fresh marks usually come out well, while old, baked-in ones may only lighten. Our tire marks guide explains this in depth.

Oil drips get a degreaser and a longer dwell. The curb line usually holds a strip of leaves, silt and organic stains. Sweep it out by hand before washing so you are not pushing debris and mud around.

Leaves from street trees collect along the curb in fall and during Santa Ana wind events, then stain the gutter and apron edge with tannin once they get wet. Clearing them regularly, especially before the first rains, keeps those brown marks from setting.

The wash itself

Start at the top of the driveway and work down toward the street, so dirty water from the upper slab does not land on a clean apron. Treat the apron and sidewalk strip with the right products before the main pass, then use a surface cleaner over the whole area for an even finish.

Finish with the curb face and top edge, using a wand at moderate pressure and steady passes. A final top-down rinse from the garage to the curb carries everything to one collection point. Done in this order, the drive looks even from the house to the gutter.

Handling the runoff at the curb

Every bit of water from a driveway job ends up at the apron, right next to the gutter, which leads to the storm drain. Los Angeles Municipal Code section 64.70.02 prohibits discharging untreated wash water from paved-surface washing into the storm drain system, unless a permit allows it.

In practice, that means blocking the gutter below the apron, collecting the water and sediment that pools there, and disposing of it properly rather than letting it run down the street. It also means sweeping up grit and debris afterward instead of rinsing it into the gutter.

Cost and the finishing touch

As of October 2026, driveway cleaning on our calculator is $0.50 per square foot and walkways and sidewalks are $0.55 per square foot, with a $195 minimum per visit. Include the apron and sidewalk strip when you measure, since they add more area than many people expect.

At Say Wash It we treat the apron and curb as the last impression of the job, not an afterthought. The flat price is confirmed before work begins, and at the end we walk the drive with you from the garage to the street.