New Construction in Sherman Oaks, With Runoff Kept on the Lot
New houses in Sherman Oaks with grade falling away from the walls, roof water slowed or soaked in under the city's stormwater rules, and LADBS review.
The first few feet of ground around a new Sherman Oaks house decide whether water ever reaches its walls. The code asks for soil to fall 6 inches in the first 10 feet away from the foundation, with paving pitched the same way, and stucco stops above grade at a weep screed so it can drain. Beyond that ring, the City of Los Angeles stormwater rules ask that part of the runoff be held or soaked in on the lot.
Gutters, downspouts and the ground at the wall
Every downspout lands in a solid pipe or a splash block that sends water past the graded ring, never into the soil against a footing. Planting beds at the wall are set low enough to keep the weep screed exposed, and irrigation there is drip, aimed away from the stucco. Where a patio or walk meets the house, its surface stays below the interior floor with the slab edge flashed. Area drains catch what the grade cannot shed, and their lines are kept separate from the downspout runs so one clog does not back up both.
Placing the stormwater device
Where the runoff device sits counts for as much as its type. A dry well or trench releases water into the soil, so the geotechnical engineer sets how far it must stay from the foundation, from the property line and from any slope face, and on a lot with grade those distances can rule soaking out altogether. A planter box can sit against the house, but its liner and a membrane on the wall behind it keep that water out of the framing. Percolation results pick between them, and LADBS reviews the choice on the drainage plan.
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The survey has to capture the height difference between the planned floor and the street gutter, because drains that leave the lot discharge through a curb outlet and need fall to reach it. Percolation rates come from the soils report, measured where a dry well or trench could go, along with groundwater if the borings meet it. A grading and drainage plan is then drawn from both.
Room to stockpile changes the soil budget. Earth dug for footings and pipe trenches can be kept on a Sherman Oaks lot and reused to shape the fall away from the walls. Without space to pile it, that soil is hauled off and clean fill is trucked back, so the same volume is paid for twice. Which case applies shows up in the grading plan's earthwork figures.
We read the grading plan against the floor heights first. A finished floor set too low for the ground around it leaves no room for the required fall away from the walls or for stucco to stop above grade, and correcting that after framing means lowering the yard around the house. Once the heights work, drains, downspout lines and the stormwater device are priced from the plan.
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