Free knob and tube tools
Both run in your browser. Nothing is sent unless you choose to send it with the form.
Pick the question you have
Not sure how urgent your wiring is, or what it might cost? These two free knob and tube tools from Conflux Cincinnati Knob and Tube help you plan before we visit the house: one sorts out how pressing your situation is, the other works out our typical price range for your job. We replace knob and tube across Cincinnati, Hamilton County and Northern Kentucky.
Which one should you start with?
Start with the assessment if you aren't sure how urgent things are: an inspection report mentioned knob and tube, an insurer asked about it, or you noticed porcelain knobs in the basement.
Start with the cost estimator if you already know the wiring needs work and want a planning range for the price. Each tool links to the other, and either result can be added to an estimate request, so you only describe the house once.
What will the cost estimator tell you?
The estimator asks what you want priced (whole house, some circuits, or an assessment only), the finished square feet or the circuit count, any panel work, whether patching is included, and the building type. It shows each part as its own line and adds them into a total range.
- Our typical ranges. A whole house runs $8 to $17 per finished square foot, about $12,000 to $35,000 and up for a typical older home. A partial job runs $750 to $2,500 per circuit.
- The permit line. For added wiring in a single-family Cincinnati house, Inspection Bureau, Inc. (IBI) publishes $120 including processing.
- Your price comes from your circuit list. The ranges are typical, not quotes. We build your written estimate from your circuit list after the first visit, and that sets the final price.
The Cincinnati cost guide explains each driver in more depth.
What does the assessment ask?
The assessment asks nine plain questions about what you already know: why you are looking, when the house was built, what rewiring has been done, whether it has fuses or breakers, what you have noticed, and whether a sale, insurer or insulation project is coming.
- Fixed rules. The answers run through rules in a published order, so the same answers always give the same result, with the reasons shown.
- Heat comes first. Warmth, scorch marks or a burning smell at an outlet, switch or light outranks every other answer.
- Nothing to open or test. It never asks you to open a panel, remove a cover or touch any wiring.
It can't see inside walls, so it doesn't say whether a house is safe or predict what an insurer will decide. The guide to identifying knob and tube covers what you can see from the attic and basement.
Your answers stay in your browser
Both tools run in your browser. Your answers appear in the page address so you can share a link, and nothing is sent anywhere unless you choose to send it with the form. The privacy policy explains what the form sends.
Questions about the tools
Do the tools work for a house in Northern Kentucky?
Yes. The assessment questions apply on either side of the river. The cost estimator uses the same company ranges for a Kentucky house. Kentucky follows its own state code, licensing and permit route, so the estimator shows no permit figure there; the local office sets that fee and it is confirmed for the address.
Can I share a tool result with my agent, spouse or insurer?
Yes. Both tools write your answers into the page address, so copying the link from your browser shares the same result. Nobody else can see it unless you send them the link or send it with the form.
Is the cost estimator result a quote?
No. It applies Conflux's typical ranges to your answers, which makes it a planning range. We set the final price in a written estimate built from your house's circuit list after the first visit, because the number of live circuits is what sets the work.
Prefer to talk it through?
Call or send the form. We start by finding out which circuits are still knob and tube.