The standard scope is the same everywhere. What shifts is where the attention goes.
The shoreline and Superstorm Sandy
Sandy came ashore in October 2012 and reshaped the southern edge of this county. More than a decade on, the beach neighborhoods are a mix: homes elevated and rebuilt to current FEMA requirements, and homes repaired in place and never lifted. Which category a house falls into affects its insurance, its resale, and what gets looked at first.
Shallow bedrock inland
Gneiss, schist, and granite sit close to the surface across much of the county, and blasting during original construction was routine on hillside lots. Ledge affects foundation drainage, where a septic leach field can physically go, and how water moves around a house after heavy rain.
Wells and septic north of the parkways
Large parts of northern Greenwich and Stamford, the Danbury outskirts, and the White Hills of Shelton have no public water or sewer. A house on a private well and a private septic system carries two major systems that a standard inspection does not evaluate unless you ask for it.
Radon: EPA Zone 1
The EPA places Fairfield County in Zone 1, its highest-potential category, meaning the predicted average indoor screening level across the county is above 4 pCi/L. That is a county-wide prediction and says nothing about a specific address, results here vary from block to block, which is the argument for testing rather than assuming.
Older housing near the cities
Bridgeport, South Norwalk, and the older parts of Stamford and Danbury hold large numbers of pre-1940 homes. Knob-and-tube wiring, fieldstone foundations, cast-iron drain lines, buried oil tanks, and layered roofing are all still out there, and all are findable before closing.