Yes, you’ll need building permits for cedar siding installation in Sayville, especially if you’re doing a complete re-siding project. The Town of Islip, which includes Sayville, requires permits for most exterior alterations that change the appearance or structure of your home. The permit process typically takes 1-2 weeks and costs a few hundred dollars, but it’s essential for ensuring the work meets local building codes.A reputable contractor will handle the permit application for you as part of their service. We’ll submit the necessary plans and specifications, coordinate inspections, and make sure everything meets Suffolk County building standards. Don’t skip this step—unpermitted work can cause problems when you sell your home and may not be covered by insurance if there are issues. The permit process also ensures that proper installation techniques are followed, which protects your investment long-term.