ADU Construction in Valley Glen, Planned Room by Room
Valley Glen ADUs laid out around a bathroom that works every day, with drains set in the slab and support placed under every bearing wall.
Drain lines under the slab make the bathroom the room in a Valley Glen ADU that drives the most foundation work. Before the pour we lay out the shower drain, the toilet flange and the sink line, slope each pipe toward the sewer connection and pressure-test the system. Once concrete covers them, moving a fixture means cutting the floor, so the bathroom layout has to be final at that point.
A bathroom that works every day
A curbless shower needs the slab recessed under the shower area so the floor can slope to a linear drain without a step. A bench wall gets blocking for grab bars, even if the bars come later. Moisture leaves through a fan ducted outside on a humidity sensor, so it never sits in the framing. Tile goes over a waterproof membrane on cement board, and the wall framing behind it is braced and sheathed so tile does not crack when the unit flexes in a small earthquake.
The rest of the floor plan around it
A kitchen sharing a wet wall with the bathroom shortens the drain runs and the water lines. The sleeping room sits on the far side, with a closet between them for sound. Doorways are wide enough for a walker, and the hallway stays free of steps. Those choices decide where interior footings or thickened slab sections go, since a bearing wall in the middle of the unit needs its own support. The floor plan and the structural sheet show both the rooms and the concrete under them.
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A slab-on-grade with reinforced perimeter footings and thickened sections under any interior bearing wall is the usual base. Drain pipes go into trenches under the slab before the concrete. A raised wood floor over a crawl space is the alternative, and it keeps the plumbing reachable for future repairs.
That turns on the footing already under the garage walls and whether the engineer accepts it. We measure its depth at a test hole and look for steel. The bathroom adds a second task: the slab is saw-cut and trenched for new drain lines, then patched. A footing found too shallow gets new concrete added beneath the shear walls.
Valley Glen units fall under the package when they stay on one level at 500 square feet or under, including garage conversions within that limit. Taller or larger designs are priced separately after a lot review, once the bathroom and kitchen layout is known.
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Describe the house and what it needs. We look at the structure first and send the quote in writing.