
- 3–5
- Days for most homes
- 120+
- Years, average wiring age
- 100%
- Permitted & inspected

What we do
Many homes throughout the Portland metro still contain their original knob-and-tube wiring, common before the 1950s and never designed for a modern household. As the insulation deteriorates the system becomes harder to expand safely, and harder to insure — some policies require replacement or decommissioning before coverage is renewed. We have spent years in older Portland homes, so the old wiring comes out with as little disruption as possible.
- Your home was built before 1950
- Your insurer has flagged the wiring or raised your premium
- You're buying a home with knob-and-tube
- Breakers trip frequently on older circuits
- You're remodeling where knob-and-tube already runs
Certifications & Licenses:

Electrical contractor
What's covered
Every project is permitted, inspected, and backed by our 20-year track record.
Knob-and-Tube Wiring Replacement
Knob-and-Tube Decommissioning
Whole-Home Rewiring
Partial Home Rewiring
Electrical System Modernization
Branch Circuit Replacement
Grounded Receptacle Upgrades
Electrical Panel Upgrades
Electrical Service Upgrades
Wiring for Remodel Projects
Electrical Safety Evaluations
Code Compliance Improvements
What you get
All of it, not a patch
The old wire is replaced end to end or properly decommissioned. What we don't do is redo the run you can see and leave the rest energized behind the plaster.
Proof for your insurer
You get the permit and the inspection report underwriters ask for — usually the one thing standing between the house and a policy that renews.
Stay in your house
Access holes stay small and get patched, finished rooms stay usable, and the work area is left clean at the end of each day.
How a job runs, from the first call to final inspection

Consultation
We walk the space, answer your questions, and go through the options, the pricing, and what happens next. If it's an emergency, you get an answer the same day.
Design & planning
Load calculations and service design are done by our own team, not subcontracted out. You see the full scope and a written price, and nothing starts until you've approved it.
Installation
Licensed crews build the job to the approved scope. We pull the permits ourselves and clean up at the end of every day.
Project completion
We walk the finished work with you, label what sits on which breaker, and go through the warranty — so everything meets our standards, and yours, before we call it done.
What our customers say
Review 1 of 3: Max
proudly serving the Portland metro
Multi Phase Electric covers the whole metro — from Hillsboro and Newberg out to Corbett, and south through Oregon City to Molalla. Licensed in Oregon and Washington, with 24/7 emergency service anywhere on this map.
- Portland, Multnomah County
- Tigard, Washington County
- Gresham, Multnomah County
- Beaverton, Washington County
- Clackamas, Clackamas County
- Hillsboro, Washington County
- Milwaukie, Clackamas County
- West Linn, Clackamas County
- Canby, Clackamas County
- Lake Oswego, Clackamas County
- Wilsonville, Clackamas County
- Dundee, Yamhill County
- Corbett, Multnomah County
- Molalla, Clackamas County
- Newberg, Yamhill County
- Fairview, Multnomah County
- Troutdale, Multnomah County
- Oregon City, Clackamas County
- Sellwood-Moreland, Portland, Multnomah County
- Tualatin, Washington County
- Bethany, Washington County
- Beavercreek, Clackamas County
- Damascus, Clackamas County
- Estacada, Clackamas County
- Sandy, Clackamas County

© CARTO, © OpenStreetMap contributors
questions, answered
The things people ask before they book. If yours isn't here, get in touch — we'd rather talk it through than have you guess.
What is knob-and-tube wiring?
Knob and tube wiring was installed between the 1880s and the 1940s — the first generation of home electrification. The system lacks proper grounding, and its insulation is brittle and prone to cracking and breaking down, which causes hazards and electrical issues. We recommend replacing it.
Should my knob-and-tube wiring be replaced?
Yes. For most homes that still have it, that is 120-plus years of use. The insulation becomes brittle and breaks down, causing electrical fires and hazardous conditions in your home. Multi Phase Electric has 20-plus years in the remodeling industry and hundreds of homes improved. We can replace your old wiring in under a week in most cases, depending on the size of your house.
Will my insurance company make me replace it?
Many insurers are reluctant to insure a home with active knob-and-tube, and some policies require replacement or decommissioning before coverage can be issued or renewed. Homeowner's insurance typically does not pay for the work as preventive maintenance, but we provide the permit and inspection documentation you need to submit once it is done.
Can we live in the house while you rewire it?
Yes, and most of our customers do. We work room by room, keep the house powered outside the circuits we are on that day, patch the access holes, and clean up the work area before we leave.
Will you have to open up my walls?
Some access holes are unavoidable — the old wire has to come out and the new wire has to get in. We keep them small, put them in closets, along baseboards, and other low-visibility spots wherever the framing allows, and we patch them when we are done.
Can you rewire only part of the house?
Yes. We do partial rewires all the time, usually where a remodel or an insurance requirement drives it, and we can decommission the circuits we are not replacing. What we will not do is replace only the visible run of a circuit and leave the rest of that old wire energized behind the plaster.
I am buying a house with knob and tube. Can you look at it before I close?
Yes. We do electrical safety evaluations for buyers and can tell you what a full or partial rewire would involve while you still have room to negotiate. Bring us the inspection report if you already have one.
What else we do
All servicesrequest your free estimate
Questions? Call (503) 908 1593










