Middle Keys · Monroe County
Structural Engineer
in Grassy Key
City of Marathon structural plans for Grassy Key waterfront homes, bayside additions, and US-1 commercial work.
The Location
Engineering in Grassy Key
Grassy Key runs MM 57-60, annexed into the City of Marathon and home to the Dolphin Research Center, a quiet mix of oceanside resorts and bayside residential.
Annexed Grassy Key (MM 57–60) does not file with the Monroe County Upper or Lower Keys offices — City of Marathon Building Department is the intake. Bayside additions near the Dolphin Research Center and small US-1 commercial jobs still need City flood and HVHZ schedules, even when the streetscape feels more rural than downtown Marathon. Structural packages for Grassy Key use the same City-formatted elevation notes and wind tables as the rest of Marathon municipal limits. Seawall-adjacent residential framing and post-storm assessments on Grassy Key stay on that City path so owners are not bounced to a county office that no longer reviews the parcel.
Project Types
Structural Engineering Projects in Grassy Key
Waterfront home additions, dock and mooring work on the bayside, seawall repair after tidal events, and small commercial projects along US-1.
- Waterfront home additions on Grassy Key
- Bayside dock-adjacent structural pads
- Seawall repair–adjacent residential framing
- Small commercial structural packages on US-1
- Hurricane retrofit for Grassy Key residences
- Elevation certificates and foundation letters
Permitting
Permits & Codes in Grassy Key
Grassy Key is within City of Marathon limits, so all permits route through the Marathon Building Department rather than the Monroe County Upper or Lower Keys offices.
- Building department
- City of Marathon Building Department
The Engineer
Plans stamped by our licensed PE
Every set of drawings that leaves this office carries our Florida PE seal (PE #79269) — no sub-consultants, no stamp-for-hire. Our firm has engineered more than 6,500 projects, with 11+ years specifically in the Florida Keys environment.
That means your Grassy Key project benefits from code fluency built specifically around Monroe County and incorporated-city review patterns — not a firm adapting a generic Florida template for a Keys lot.
Meet the engineer →Start your Grassy Key project