Structural Engineering for ADUs and Backyard Cottages
Backyard cottages, units over the garage, basement apartments, attached in-law suites. Washington's ADU laws have opened up a lot of lots, and the structure is where the plans get real. Licensed Washington PEs; stamped drawings and calcs for permit.
ADU types we engineer
Detached ADUs (DADUs), garage conversions and units over garages, attached ADUs, and basement units with new openings, beams and egress headers.
What's in the package
Foundation plan, framing plans, shear walls and hold-downs, stamped calcs, and answers to plan review.
Pricing
Defined ADU work gets a clear fixed price once we see your plans. Code, red-tag and open-ended work starts with a short hourly agreement.