ADU Construction in Long Beach
ADUs in Long Beach planned around the slab: bathroom drains set before the pour, sleeved through footings, and steel that resists corrosion.
Showers, toilets and sinks in a Long Beach ADU all drain through the slab, so the foundation fixes the bathroom's place in the plan as firmly as the floor plan does. We set it on the side nearer the house sewer, keep drain runs short with steady fall, and sleeve each pipe that crosses a footing. Above the floor, a humidity fan pulls steam out, and a curbless shower pan sloped to a linear drain lets someone step in without a ledge.
Plumbing in the slab
Every drain under a slab is set before the concrete goes in, so a layout change after the pour means cutting concrete. We stake fixture spots on the ground, run the pipes at a steady fall toward the lateral, and have the inspector see them under test before the pour. Where a drain crosses the perimeter footing it passes through a sleeve, so a footing that shifts during an earthquake does not shear the pipe. A cleanout outside the unit gives access to the line, and water supply lines can run overhead in the walls, clear of the concrete.
Coastal checks and city inspections
Parcels near the water in Long Beach may sit within the state coastal zone, which can add a coastal permit before building plan check, so we confirm that for the lot early. City plan checkers then go through the structural set, including shear walls, hold-downs and footing details, and the plumbing plan showing where the bathroom drains tie in. Hardware is specified galvanized or stainless for any lot within reach of salt air. Once approved, inspections follow the build: footing and underslab plumbing, then framing and hardware, then insulation, and a final before anyone moves in.
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ADU Construction in Long Beach: questions
The engineer sizes it to the soil and the walls above: on firm ground, a slab with a deepened edge, and on soft ground, a raised floor over stem walls or piers. Either way, corrosion-resistant bolts and hold-downs fasten the walls to that concrete, and the drain lines are placed before any pour.
A Long Beach garage can convert on its existing slab when the edge footing checks out for depth and condition. When it does not, we saw out strips along the new shear walls, pour proper footings there and set fresh anchor bolts. The bathroom drain also needs a trench, which we patch with new concrete over a vapor barrier.
Single-level units sized at 500 square feet or smaller. Two-story designs and anything bigger get their price once the lot and plans have been reviewed. In Long Beach, the plumbing layout on the floor plan and the foundation details hold the decisions that are hard to change once concrete is poured.
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Describe the house and what it needs. We look at the structure first and send the quote in writing.