Can I Add a Second Story to My Garage?
Sometimes — the garage's structure (the slab's — the unreinforced; the walls' — the framed) rarely supports the second story (the foundation's — the inadequate; the framing's — the upgraded). The addition: the structural (the engineer's — the evaluation; the new foundation's — the underpinning), the zoning (the height — the accessory's; the setbacks'), and the permits (the building's — the addition's). The evaluation first — the dreaming second.
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The structural reality
The slab (the 4-inch — the unreinforced; the thickened — the required), the walls (the framed — the 2x4's; the shear's — the upgraded), the foundation (the footing's — the narrow; the underpinning's), and the evaluation (the engineer's — the capacity's; the report's).
Zoning
The height (the accessory's — the 15-25 foot; the limit's), the setbacks (the second's — the sometimes larger; the privacy's), the size (the lot's — the cap; the FAR's), the ADU (the conversion's — the liberalized; the second's — the unit), and the HOA (the appearance's — the review's).
Cost and permits
The $150-$300+/sq ft (the addition's — the structural's; the retrofit's), the permits (the building's — the addition; the electrical's — the plumbing's), and the alternative (the teardown's — the rebuild's; the new's — the designed). The engineer's evaluation — the $1,000-$2,000 — the first money spent.
The bottom line
Garage second stories need a structural evaluation first (slabs/footings rarely adequate — underpinning likely), plus zoning height/setback compliance — budget $150-$300+/sq ft or consider rebuild.
Torch Engineering PLLC · (480) 490-0064 · info@torchengineering.com — PE stamping backed by Apex Grid Engineering.