New Haven County does not have a centralized county government for building or zoning; all permitting, inspections, and planning are handled exclusively by the 27 individual cities and towns. Municipalities manage their own zoning regulations, including specific coastal management overlays for shoreline communities and inland wetland protections.
How this fits with the state
The state authority here is Connecticut Department of Consumer Protection. The county file does not replace that — it adds the permit office, local overlays, and the actual filing path.