Permits run through the Town of Islip
Because Brentwood is an unincorporated hamlet, there's no separate Brentwood village government. Permits come from the Town of Islip. Under the town code, parades, races and assemblies on town streets, waterways or facilities need a permit from the Town Clerk, approved by the Town Board. The Town Clerk's parade, race and assembly application carries a nonrefundable fee ($250 on the 2026 form) and must be filed at least 60 days before the event, or 75 days ahead if attendance is expected to top 1,000. Late filings can draw late fees.
Carnivals, circuses and fairs use a separate Town Clerk application with its own fee and lead time. The town also has a facility-use application for events on town property or with large crowds. Confirm current timelines with the Town Clerk's office, because requirements change.
Private events on your own property, such as a graduation party in the backyard, generally don't need an event permit, but keep units off sidewalks and out of the street.
Long Island seasons
Summer is the busiest stretch, with graduations, communions, family reunions, sports tournaments and outdoor festivals. Humid July and August weekends mean tanks fill faster, so ask for a mid-event service if your gathering runs long. Spring and fall bring weddings and school events.
Winters are cold, with occasional nor'easters that dump snow. Construction sites in and around Brentwood keep units through winter; ask about freeze protection and make sure someone keeps a path clear for the service truck.
Construction and job sites
Suffolk County's mix of home renovations, multifamily projects and commercial and industrial work along the main corridors keeps job-site demand steady. OSHA's sanitation standard ties the toilet count to headcount, so a multifamily job with a large framing crew needs more than the single unit a kitchen remodel gets by with. For small residential jobs, a single unit with weekly service is typical. Larger sites often add a handwashing station or a second unit near the trailer office.
Planning your order
For a backyard party or community event lasting around four hours, a common guideline is one standard unit for every 50 guests. Plan more if alcohol is served, if many kids are coming, or if the event runs all day. Include ADA-accessible units, following Access Board guidance of at least 5% of units per cluster, and never fewer than one.
Placement tips for residential lots:
- Choose a flat, firm spot the truck can reach from the driveway or curb.
- Keep units away from windows, patios and food tables.
- Avoid soft lawns after heavy rain, which can trap delivery vehicles.
Typical costs on Long Island
Long Island rates generally sit above the national average. Roughly:
- Standard unit for a weekend event: about $125 to $275
- ADA unit: typically $175 to $375
- Restroom trailer: often $1,000 to $3,500 or more per event
- Monthly construction rental with weekly service: around $150 to $325
Request quotes
Post your job on Rental Site Services with your Brentwood address, date and guest count. Central Suffolk companies shown on this page will reply with no-cost pricing, so you can weigh rates and service schedules side by side.