La Verne, Los Angeles County

Home additions over a garage in La Verne

Aspenwell Construction plans a La Verne room over an attached garage from the footing up, sizing the door header and shear panels before the floor is drawn.

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A home addition built over an attached garage in La Verne starts below the garage floor. The garage was framed to carry its own roof, and a bedroom above adds floor joists, walls, furniture and people. The wide door opening is the weak spot. Its header and the short wall pieces beside it have to take far more weight and resist sideways force in a quake, so the engineer sizes those before any room is drawn.

Footings and the door opening

We expose a short length of the garage footing to see its depth and width, since a thin slab edge cannot carry a second floor. If it falls short, new footings are poured along the walls and tied into the old concrete with epoxy anchors. At the door, a larger header goes in, and the narrow walls on each side get engineered shear panels with hold downs, or a steel frame where those wall pieces are too short for plywood. These pieces are inspected before the garage ceiling is opened up for the new floor.

Permit and the rest of the addition

Plan check for La Verne takes the footing, the opening and the new floor framing as one set, with the engineer's calculations attached. Once those structural steps pass inspection, the room itself goes up in order, from floor framing and walls to the roof tie-in, windows and the finishes inside. In San Dimas, Claremont or Glendora nearby, a room over a garage goes through that city's review with the footing and the opening proven before anything is stacked on them.

Plan structural work in La Verne

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