ESA Licensed Electrical Contractor #7018850•Serving homeowners across Eastern Ontario
Mon–Fri 7am–6pm•(613) 265-9604
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Electrical service

Custom home electrical with a process your builder can rely on.

Complete electrical packages for new residential builds across Eastern Ontario. Planning, rough-in, finish, and ESA inspection — on time, on schedule, coordinated directly with your GC.

G ★★★★★ 5-star rated on Google · Read reviews
Cornerstone Electrical truck at a new custom home build in Eastern Ontario
ESA LicensedElectrical Contractor #7018850
309A LicensedCertified Ontario electrician
$2M InsuredFull liability coverage
WSIB CoveredNo liability on your property
Every custom home package includes
  • Service entrance & meter baseUnderground or overhead, 200A standard
  • Main panel with all breakersAFCI protection where code requires
  • Complete branch wiringAll outlets, switches, lighting, appliances
  • Smoke & CO detectorsInterconnected, hardwired with battery backup
  • ESA permit & all inspectionsUnderground, rough-in, and final
  • Circuit labelling & handoverPanel directory filled out, walkthrough included

How we work on a custom build

Three visits, clean handoff, no surprises for the GC or the homeowner.

1. Planning

Review plans, confirm service size, walk through pre-wire options, lock pricing. Happens before any site work starts so the budget is fixed.

2. Underground (if applicable)

Service conduit run from the pole or transformer to the panel location, buried at code depth during foundation backfill. ESA inspection, utility coordination.

3. Rough-in

Panel set, all circuits pulled, boxes installed, smoke/CO locations verified. Happens after framing and before insulation. Rough-in ESA inspection closes this stage.

4. Finish

Devices installed, fixtures wired (when supplied), panel trimmed and labelled. Happens after paint and flooring, just before occupancy.

5. Final inspection

ESA final inspection scheduled and attended. Certificate of Acceptance issued and handed to the homeowner and builder.

6. Handover

Walkthrough of the panel, labelling, and any homeowner-facing controls. Documentation emailed. Warranty on workmanship in writing.

Planning a new build?

Use the free estimate tool to budget before you quote

Answer a few questions about your build and get a realistic ballpark price in under two minutes. Useful for budgeting before you go to detailed quotes.

Open the Free Estimator

Want the full breakdown first? Read our 2026 guide to wiring a new house in Ontario.

Custom home wiring FAQ

For underground service, we need to be on-site during foundation backfill so the service conduit is buried at the right depth. For rough-in, we come in after framing is complete, roof is on, and windows are installed — but before insulation and vapour barrier. Finish stage is at the end, after paint and flooring. Coordinating these three visits with your GC is critical; delays in the rough-in inspection hold up drywall.

Most custom homes in Eastern Ontario land between $14,000 and $28,000 for a complete electrical package — underground service, panel, all branch wiring, outlets and switches, smoke/CO detectors, ESA permit and inspection. Square footage, service size, number of floors, and add-ons (EV circuits, heated floors, hot tub pre-wire) drive the variance. Our estimate tool gives you a realistic ballpark in about 90 seconds.

Yes. Most of our custom home work comes through GCs and project builders. We coordinate directly with the build schedule, show up on the date committed, and don't hold up inspections. We carry our own $2M insurance and WSIB coverage, which streamlines onboarding for most builders.

Anything you might want in the next 10 years is cheaper to pre-wire now than to retrofit later. Common adds: EV charger circuit in the garage ($750 now vs. $2,000+ after drywall), hot tub pre-wire, heated floor circuits in bathrooms, extra exterior outlets, generator inlet, home office 20A circuit, and ceiling fan rough-in in bedrooms. We walk through the options during the planning meeting.

Three ESA milestones on a typical build: the underground inspection (if applicable), the rough-in inspection before insulation, and the final inspection after devices are installed. Each one is scheduled by us and typically booked within a few business days. You get a Certificate of Acceptance after the final passes — you'll need it for your occupancy permit.

Reviews

What our customers are saying

Real reviews from real customers on Google.

5.0
★★★★★
7 Google reviews
★★★★★
“I had an excellent experience with Cornerstone Electrical installing the charger for my Ford Mustang Mach-E. The installation was done professionally, everything was neat and well organized, and the entire process was smooth from start to finish. The electrician was incredibly friendly, knowledgeable, and took the time to answer all of my questions. It’s clear they take pride in their work. I highly recommend Cornerstone Electrical to anyone looking for a reliable EV charger installation. Five stars all the way!”
M
M. E.Google review · EV charger installation
★★★★★
“Great service and communication. I emailed them for a quote. I got a quick response back. I needed a EV charger installed and some breaker change in my panels. The job was quick and everything looks good and professional. I would definitely recommend them.”
S
Sylvain L.Google review · EV charger & panel work
★★★★★
“Excellent service / top-notch job completion. Was on time and completed the necessary work in a professional manner. Was very polite and great to work with. Would absolutely recommend.”
B
Brock A.Google review
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Talk to us about your custom build

Share the plan set or a rough scope and we'll come back with a full itemized electrical quote, a schedule, and a list of pre-wire options worth considering.

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