Contractor Quote Checklist
Knob-and-Tube Wiring Replacement Quote: 9 Scope Checks
Short answer: Compare a knob-and-tube wiring replacement quote by asking for a room-by-room circuit map, the exact wiring and devices being replaced, the grounding and panel strategy, every planned wall or ceiling opening, temporary power, permit and inspection responsibility, testing criteria, patch-and-paint ownership, and a closeout package that proves the old conductors were disconnected rather than merely hidden.
Older wiring projects become expensive and disruptive when the estimate names a house size but not the circuits, access route, device count, panel work, or finish repairs. Knob-and-tube conductors may also share altered circuits, pass through insulation, or connect to newer cable in places that are not visible during a short sales visit.
Do not compare bids by the words “whole-house rewire” alone. One bid may include circuit tracing, grounded cable, new boxes and devices, panel corrections, permits, testing, plaster repair, painting, and disposal while another includes only cable installation to accessible locations.
Start With A Circuit And Condition Survey
Require a room-by-room inventory of lights, receptacles, switches, fixed appliances, basement and attic runs, outbuildings, and any newer cable spliced into the older system. The proposal should distinguish observed knob-and-tube wiring from assumed concealed runs and identify where exploratory access is still needed.
Record warm or loose devices, flickering, damaged insulation, overfusing, ungrounded receptacles, crowded boxes, extension-cord dependence, and abandoned conductors. CPSC materials describe aging, overload, unsafe extensions, and enclosure by later remodeling or insulation as conditions that can contribute to wiring failures.
Define The Replacement Boundary
List every circuit and device included, the new conductor type and gauge, required dedicated circuits, grounding method, junction boxes, receptacles, switches, fixtures, smoke or carbon-monoxide alarm connections, and any low-voltage wiring that must be protected during access.
State what remains: service entrance, meter equipment, main panel, subpanels, feeders, newer branch circuits, exterior wiring, detached structures, and specialty loads. If the contractor plans to leave any knob-and-tube conductors, require their locations, reason, condition, load, protection, and code approval in writing.
Connect The Rewire To Panel Capacity And Protection
The quote should show existing service and panel ratings, available spaces, load calculation responsibility, breaker changes, neutral and grounding corrections, bonding, labeling, surge protection if offered, and whether panel or service upgrades are included, allowances, or separate alternates.
Require a clear decision on AFCI and GFCI protection, tamper-resistant receptacles, three-prong outlets, and appliance or wet-location circuits based on the locally adopted code and inspector requirements. A new three-slot receptacle is not proof that an equipment grounding path exists.
Map Access Before Walls Are Opened
Mark proposed openings on photos or plans and name the access method for plaster walls, decorative ceilings, tile, cabinets, floors, attics, crawlspaces, and fire-blocked cavities. Set limits for exploratory openings and a written change process if framing, insulation, hazardous material, hidden damage, or blocked routes are found.
Clarify furniture protection, dust containment, floor covering, daily cleanup, occupied-room sequencing, temporary lighting and receptacles, security, pets, lead-safe practices where applicable, and how long each area may be without power.
Separate Electrical Work From Finish Restoration
Identify who patches lath and plaster, drywall, trim, tile, flooring, cabinets, siding, and paint. Define finish level, texture matching, primer, paint boundaries, color matching, cure time, debris disposal, and the handoff between electrician and finish contractor.
Allowances should include a unit basis or approval rule. A vague “patching by owner” exclusion can turn a competitive electrical bid into a much larger total project after dozens of access holes are counted.
Require Testing, Inspection, And Proof Of Disconnection
Name the permit holder, inspection stages, concealed-work hold points, continuity and polarity checks, grounding verification, device and breaker testing, panel schedule update, circuit identification, and correction process for failed inspection or test results.
The closeout should include permit approvals, inspection results, final circuit directory, photos before openings are closed, change orders, product and breaker information, warranties, and a statement describing how abandoned conductors were disconnected at every source.
How To Review The Quote In Two Passes
Pass One: Confirm Safety And Scope
Trace Every Circuit
Match the circuit inventory to rooms, devices, fixed loads, panels, and any newer splices. Mark every unknown so it becomes an investigation task instead of an unpriced assumption.
Verify The Grounding Strategy
Ask how each replaced branch circuit, box, device, panel, and required protection will be grounded, bonded, labeled, tested, and accepted under the locally adopted code.
Pass Two: Confirm Disruption And Closeout
Count Access And Restoration
Use marked photos to compare openings, containment, temporary power, patch materials, paint limits, cleanup, and responsibility for concealed conditions.
Demand Verifiable Completion
Tie final payment to inspection approval, circuit labels, electrical tests, closed openings, finish acceptance, debris removal, warranties, and proof that old wiring is de-energized.
Knob-and-Tube Rewire Quote Comparison
| Quote area | What to confirm | Why it matters |
|---|---|---|
| Existing conditions | Room and circuit inventory, newer splices, device condition, panel data, insulation, and unknown concealed runs | Prevents a house-size estimate from hiding unresolved circuits |
| Replacement boundary | Included circuits, cable, boxes, devices, dedicated loads, grounding, alarms, exterior areas, and explicit exclusions | Makes “whole-house” a countable scope |
| Panel and protection | Load calculation, service and panel capacity, breakers, bonding, AFCI, GFCI, labeling, and alternates | Connects branch wiring to the system that protects it |
| Access plan | Marked openings, route, limits, dust control, temporary power, occupied sequencing, and concealed-condition process | Controls disruption before demolition begins |
| Finish restoration | Plaster, drywall, trim, tile, cabinets, paint, texture, cleanup, allowances, and responsible trade | Reveals the real completed-project scope |
| Verification | Permits, inspections, concealed-work photos, polarity, continuity, grounding, protection-device tests, and panel directory | Produces evidence for work hidden behind finished surfaces |
| Closeout | Approval records, change orders, warranties, final labels, product data, and old-conductor disconnection statement | Makes completion and future maintenance defensible |
Questions To Ask Before Approval
- Which rooms, circuits, devices, panels, feeders, and outbuildings were actually traced?
- Which knob-and-tube conductors or altered splices may remain, and why?
- Does the existing service and panel have verified capacity and space for the final circuit plan?
- How will grounding, bonding, AFCI, GFCI, receptacle type, and labeling be handled?
- Where will walls, ceilings, floors, cabinets, or exterior finishes be opened?
- Who provides temporary power, dust control, protection, patching, texture, paint, and cleanup?
- Which permits, inspections, tests, photos, and circuit records prove completion?
- What triggers a change order, who approves it, and what unit basis controls added access or repair?
Red Flags In This Quote
A single lump sum with no circuit count, access map, device schedule, panel decision, or finish boundary cannot be compared reliably.
Replacing two-slot receptacles with three-slot devices without a documented grounding and protection method can create a false impression of safety.
Closing access holes before inspection, testing, photographs, and circuit labeling removes the best evidence for concealed work.
Source Links
- CPSC report on residential electrical fire conditions including knob-and-tube wiring
- CPSC Home Electrical Safety Checklist PDF
- U.S. Fire Administration appliance and electrical fire safety
- FTC guidance for comparing home improvement estimates and contracts
FAQ
Does all knob-and-tube wiring have to be replaced at once?
The answer depends on condition, alterations, insulation, load, insurer requirements, planned remodeling, and local code. The quote should state the evaluated boundary and obtain the required permit and inspection decisions.
Can a contractor rewire without opening plaster walls?
Some routes may use attics, basements, crawlspaces, closets, or limited fishing, but blocked cavities and fire stops can require openings. Demand a marked access plan and restoration responsibility.
Should a panel upgrade be included in the same quote?
It should at least be evaluated. The proposal must show load, service and panel capacity, breaker compatibility, spaces, grounding and bonding, then price any required upgrade as included work or a clear alternate.
How do I know the old wiring is no longer energized?
Require circuit tracing, source disconnection, testing, panel-directory updates, accessible verification before closure, and a written closeout statement describing abandoned conductors.
Who repairs the holes after rewiring?
Only the written contract decides. It should name the responsible trade, materials, finish level, texture and paint boundaries, schedule, cleanup, and approval standard.
What should final payment depend on?
Use permit and inspection approval, completed tests, accurate labels, restored finishes, cleanup, closeout documents, warranties, and resolution of the punch list rather than cable installation alone.
Internal Link Candidates
- Whole-house rewiring quote checklist
- Electrical panel upgrade quote checklist
- Attic air sealing and insulation quote checklist
A rewiring quote is ready to approve when every circuit, access opening, grounding decision, inspection, finish repair, and closeout record has a named owner and a verifiable acceptance point.