Updated November 13, 2026 · No Shorts Electric
Which commercial electrical jobs need a permit, how town and village requirements differ on Long Island, which inspection agencies are used, when PSEG Long Island has to be involved, and realistic timelines.
Almost every commercial electrical job on Long Island beyond a like-for-like repair needs a permit, and the rules differ by town and village. A contractor who knows the local process keeps a project off the critical path; one who does not can hold up an occupancy certificate for weeks. This guide covers how it works in Nassau and western Suffolk.
What needs a permit
- New circuits, service upgrades, panel and sub-panel replacement, and any change to the service entrance.
- Fit-outs, renovations and additions.
- EV charger installations, generators and transfer switches.
- Exterior and parking lot lighting on new circuits.
- Like-for-like device and fixture replacement generally does not, but check with the municipality on anything that touches the panel.
Towns, villages and inspection agencies
Nassau County is divided among towns, cities and more than sixty villages, and each has its own building department and its own filing process. Some file online, some on paper, and fees differ. Most municipalities on Long Island accept inspections from approved third-party electrical inspection agencies rather than inspecting themselves, and the contractor arranges the inspection and delivers the certificate to the municipality and the owner.
When PSEG Long Island is involved
Any change to the service, meter or utility connection requires a PSEG Long Island application, and the utility will not energize new service without the electrical inspection certificate. For upgrades, the utility work is scheduled after the permit is in hand and the inspection is arranged, which is why a service upgrade takes longer than the electrical work alone.
Timelines
Permit issuance ranges from a few days to several weeks depending on the municipality and the project. Inspections can usually be scheduled within days of the work. Utility work for a service change is typically the longest step. Build the permit into the project schedule from the start.
What we do about it
- Service upgrades and three-phase →
Service sizing, PSEG Long Island coordination, panel and sub-panel work, dedicated circuits, permits and inspection, and downtime planning for commercial buildings adding equipment, tenants or EV charging.
- General contractors →
Fit-out scope, demolition, dedicated lines, permits and inspections, and a schedule you can rely on, from a licensed Long Island electrical contractor with four decades of commercial work.