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The Walk Through Your New Build Before the Drywall Goes Up

Construction · October 2026

The Walk Through Your New Build Before the Drywall Goes Up

By Sonoma Sun Electric · Sonoma County & the North Bay

The Short Version

Between the rough electrical inspection and the insulation crew there is a short window when every box, every switch location and every cable in your new house is visible. Moving an outlet then takes a drill and a few minutes. Moving it after drywall means cutting, patching, texturing and painting. Walk the house in that window with your electrician and a furniture plan, and most of the regrets people have about their wiring never happen.

Why the window closes so fast

A build runs on a sequence. Framing finishes, the plumber and the HVAC installer run their lines, we pull wire and set boxes, and the inspector signs off on the rough. Then insulation arrives, and drywall follows close behind. On a well-run job the gap between our rough inspection and the first batt going in can be a matter of days.

That is why we put the walkthrough on the builder’s calendar early instead of hoping it fits. On Windsor’s newer neighborhoods the schedule is usually set by a general contractor juggling several trades, and on an addition to an established lot the homeowner is often living next door to the work and can walk over the same afternoon. Either way, we let the builder know the walkthrough is coming so insulation does not get booked into the slot.

The goal is simple. Every person who will live in the house stands in each room with the walls open and asks whether the outlets, switches and lights match how that room will actually be used. Changes get marked on the studs in front of everybody.

Bring the furniture plan, even a rough one

Plans show rooms. They rarely show where the bed goes, and the bed decides more about a bedroom’s wiring than anything else. Nightstand outlets, a switch for the ceiling light reachable from the doorway, maybe a second switch by the bed: all of that depends on which wall the headboard sits against.

The living room depends on the sofa. If it floats in the middle of the room, a floor receptacle under it saves a lamp cord running across the rug. The television wall needs a receptacle and a low-voltage pass-through at the height the screen will actually hang, which is usually higher than the standard outlet height.

Then the doors. Switches belong on the latch side, where your hand lands as the door opens, and plans are occasionally drawn before a door swing gets reversed. Long hallways and stairs need switches at both ends.

Kitchen islands deserve their own minute. Where the stools go, where a laptop gets charged, and which end the mixer lives on all decide receptacle placement. Bring a tape measure and a sketch. It need not be pretty.

Circuits to run while the studs are bare

Some wiring takes little effort now and causes a great deal of disruption later. The walkthrough is where we confirm it is in the plan.

An EV charger circuit to the garage is the obvious one, even if the car is still two years off. Pulling a properly sized feeder while the walls are open is quick, and it means the charger install later is a matter of mounting and connecting.

Backup power is the other. If a battery system or a generator might ever join the house, now is the time to decide where it would mount, run conduit or cable to that spot, and leave room in the panel layout. A generator inlet box on an outside wall, with its wiring already in place, turns a future project into an afternoon.

Outdoor receptacles on each side of the house, a circuit for a future hot tub pad, conduit to the roof for solar, and a spare empty conduit from the panel to the attic all belong on the list. Each one is a few feet of material today. The point of all of it is that nothing gets cut open later.

Trenches, feeders and the underground work

Below grade, the same logic applies with a shovel instead of a drill. New construction and additions on larger lots often involve underground service to the house or trenched feeders to a detached garage, a shop or an accessory unit.

Nobody wants to dig the same trench twice. So while one is open we look at what else could share it. A spare conduit with a pull string takes minutes to lay in the moment and gives you a path for low-voltage cable, a future garden lighting circuit or a second feeder years from now. Conduit gets laid at the depth the work requires, and the inspector sees the trench before anything goes back over it.

Coordination matters here more than anywhere. Plumbers, irrigation installers and the gas utility may all want space in the same ground, and a backhoe returning for a forgotten run tears up finished grading.

On a builder’s job we keep in contact with the superintendent so trench work happens once, in the right order, with nothing left to chance.

Inspection, final trim and a panel you can read

Passing inspection the first time is a matter of habit: boxes at consistent heights, cables secured and protected where they cross framing, everything labeled at the panel for the inspector’s review. A failed rough inspection costs the builder days, and it pushes back everyone else on the schedule.

After drywall and paint comes trim, when devices, cover plates and fixtures go in and every circuit gets tested under power. That is also the moment for the step most new houses skip: a panel directory that names rooms the way the family names them. Labels like lights 1 and receptacles 3 are useless at eleven at night with a breaker tripped.

One last habit worth stealing: before insulation goes in, take photos of every open wall with a tape measure in frame. Years later, when you want to hang a shelf or find a cable, those pictures are worth more than the plans.

For more on how we approach the full job, see our page on new construction wiring in Windsor. Builders and owners can reach us at (707) 684-0024 or share plans through the contact page, and we will read them through and tell you what it’ll cost.

Questions we get

Can outlets still move after the rough inspection passes?

Yes, as long as insulation and drywall are not in. Small changes like shifting a box along a wall or adding a receptacle are normal at this stage. Larger changes may need the inspector to take another look, which we arrange. What matters is catching them before the walls close, which is the entire reason for the walkthrough.

Do you work for the builder or for the homeowner?

On most new builds we are hired through the general contractor and work to their schedule. That does not stop us from walking the house with the owners, and we prefer to. On additions and owner-managed projects we often work for the homeowner directly. Either way, the person who quotes the job is the one who wires it.

Is it too late once insulation is already in?

Not hopeless, just slower. Batts can be pulled back in a stud bay to move or add a box, then replaced. Spray foam is much harder to work around. Once drywall is up, every change means an opening and a patch. If you are reading this mid-build, call before the drywall crew arrives.

Get the walls right while they are open

We wire to the builder’s schedule, walk the house with you before drywall, and leave a panel your family can actually read. The first visit is free, no strings attached.

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