ADU Construction in San Dimas, Ready for Plan Review
San Dimas ADUs drawn so plan review can trace the lateral load from roof sheathing to footing, with inspections that follow the same chain.
Structural calculations get careful attention when a San Dimas plan reviewer opens a backyard unit set. The reviewer traces the lateral load from the roof sheathing through each shear wall and hold-down to the footing, and checks that the footing size matches the soil bearing value in the report. Gaps in that chain come back as corrections. Our engineer writes the calculations so each step points to a detail on the drawings.
Setbacks, separation and size
The zoning check covers side and rear setbacks, distance from the main house, height and floor area, each measured against state ADU law and the city's own rules. Walls close to a property line are read for fire separation, and any window in them for size. An easement crossing the yard has to appear on the site plan with the unit clear of it. We draw all of this from a measured survey of the lot, so the numbers on the sheet match what an inspector will find with a tape on the day of the visit.
Inspections that follow the load path
Once a permit is issued, the inspections trace the same chain the reviewer read. The footing inspection happens with steel and anchor bolts in place before concrete. Framing comes after that, with shear panel nailing, hold-downs and straps left exposed so the inspector can count fasteners. Insulation and drywall are inspected in turn, and the final covers smoke alarms, egress windows and the finished grading. Each stage must pass before the next one starts, which is why the work is scheduled around those visits.
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ADU Construction in San Dimas: questions
The reviewer will expect a foundation matched to the soils report, which for a San Dimas unit generally means a reinforced slab with continuous footings at the perimeter and deeper pads under any beam posts. Anchor bolt spacing and hold-down positions are drawn on the foundation plan, and an inspector verifies them inside the forms ahead of concrete.
Only after we confirm what the existing footing can do. We dig at the wall to measure its depth, width and steel. If the reviewer would accept it for a dwelling, we add anchors and shear panels. If not, new footing sections are drawn under the walls that brace the room, and that detail goes into the permit set.
The plans package fits a one-story San Dimas unit at or below 500 square feet, detached, attached or converted. Since plan review here looks hard at the lateral design, the structural sheet with shear wall and hold-down locations is where we spend the most drafting time. Two-story and larger units are priced separately once we have walked the lot.
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Describe the house and what it needs. We look at the structure first and send the quote in writing.