Key takeaways
- Rough-in is when boxes, cables and the panel are installed in the open framing.
- The ESA rough-in inspection must pass before insulation and drywall go up.
- Changes are cheap at the plan stage and expensive once walls are closed.
In new home construction, the electrical work happens in two main stages: rough-in and finish. Rough-in is where most of the important decisions get locked in, so it pays to understand it.
What happens at rough-in
- The panel location is set and the service is planned
- Boxes for outlets, switches and lights are mounted on the framing
- Cables are run through the studs and joists to every box
- Dedicated circuits are run for the kitchen, laundry, furnace, heat pump, EV charger and other large loads
- Low-voltage and network cabling is often run at the same time
Where it fits in the schedule
Rough-in happens after framing, roofing and windows, and usually alongside plumbing and HVAC rough-in. It has to be finished and inspected before insulation and drywall. A delay here holds up every trade that follows, which is why we coordinate closely with the builder.
The rough-in inspection
The ESA inspects the rough-in wiring while it is still visible. Once it passes, insulation and drywall can go up. Read more about ESA permits and inspections.
The finish stage
After drywall and paint, we return to install devices, fixtures, the panel's breakers and equipment connections, then complete the final inspection and walk you through the finished job.
Planning tips for homeowners
- Walk the plans before rough-in. Think about where furniture, TVs and desks will go.
- Plan for an EV charger even if you do not own an EV yet. Running the circuit now is far easier than later. See our EV charger guide.
- Leave spare panel capacity for future heat pumps, hot tubs or a basement apartment.
- Plan lighting zones and where you want dimmers and pot lights.
- Outdoor needs such as exterior outlets, soffit lights and landscape lighting circuits.
New home construction is one of FM Electric's specialties. We work with builders and homeowners across Grimsby, Lincoln, Thorold, Pelham, West Lincoln and the region. See our new home construction service or call (905) 931-4522.
Frequently asked questions
How long does electrical rough-in take?
It depends on the size of the home and the scope. We give you a timeline with your quote and coordinate it with the builder's schedule.
Can I change outlet locations after rough-in?
Yes before drywall, though it may affect the schedule. After drywall, changes mean opening walls, so walk the plans carefully before rough-in.
