Electrical
Electrical work is licensed in most states and usually needs permits and inspections, so the license is one of the first things a GC checks.
Subcontractor paperwork, trade by trade.
Every trade brings different paperwork: licenses for electrical and plumbing, safety records for roofing and steel, insurance for everyone. Pick a trade to see what GCs typically collect and how SubSignoff requests and tracks it. Requirements vary by state and contract.
Plumbing
Plumbing is a licensed trade in most states, and the work is permitted and inspected, so GCs typically collect the license alongside insurance.
HVAC
HVAC and mechanical contractors are licensed in many states, and techs who handle refrigerants need EPA Section 608 certification.
Roofing
Roofing is high-risk work at height, so GCs usually look closely at insurance, safety programs and fall-protection training.
Concrete
Concrete crews work with heavy equipment, formwork and silica dust, so safety documentation matters as much as insurance.
Framing
Framing crews work at height on almost every job, so GCs usually want proof of workers’ compensation and a safety program before the crew starts.
Drywall
Drywall and interior finish subs are often smaller crews, so the basics, insurance, W-9 and a license where required, are what GCs check most.
Painting
Painting subs are often small businesses. Insurance and a W-9 are the usual minimum, with lead-safe certification on older homes.
Excavation & sitework
Excavation and sitework involve heavy equipment, trenching and utilities, so GCs commonly ask for safety history as well as insurance.
Steel & welding
Steel erection and structural welding are high-hazard trades, so GCs often ask for safety history and qualifications up front.