Knob and Tube Wiring Replacement Cost in Orangeburg SC

By Sikes Electrical | September 13, 2026 | 8 min read

Knob and tube wiring replacement in Orangeburg, SC typically costs between $5,000 and $15,000 for a complete home rewire, with most homeowners paying around $8,000 to $10,000 depending on the home's size, accessibility, and the extent of the electrical system upgrade needed.

What Is Knob and Tube Wiring and Why Does It Need Replacement?

Knob and tube wiring is an outdated electrical system commonly installed in homes built between the 1880s and 1940s, and many historic homes throughout Orangeburg County still have this type of wiring. This early electrical system uses ceramic knobs to hold wires in place and ceramic tubes to protect wires passing through wooden framing members. While it was acceptable by the electrical standards of its time, knob and tube wiring lacks a ground wire, cannot handle the electrical demands of modern appliances, and poses serious fire hazards when insulation is added around it or when the old wiring deteriorates.

Many insurance companies in South Carolina refuse to insure homes with active knob and tube wiring, or they charge significantly higher premiums due to the increased fire risk. If you're buying or selling a home in Orangeburg, discovering knob and tube wiring during a home inspection often becomes a deal-breaker unless replacement is addressed. Beyond safety and insurance concerns, this antiquated system simply can't support today's electrical loads from air conditioning units, modern kitchen appliances, computers, and charging devices that Orangeburg residents rely on daily.

How Much Does Knob and Tube Wiring Replacement Cost in Orangeburg?

The average cost to replace knob and tube wiring in Orangeburg homes ranges from $5,000 to $15,000, with most projects falling in the $8,000 to $10,000 range for a typical 1,500 to 2,000 square foot home. Several factors influence the final price, including your home's size, the number of circuits needed, accessibility to existing wiring, whether walls need to be opened, and the complexity of bringing your electrical system up to current National Electrical Code (NEC) standards.

Smaller homes or partial replacements covering just a few rooms might cost as little as $3,000 to $5,000, while larger historic homes in downtown Orangeburg or surrounding areas of Orangeburg County with multiple stories, finished basements, or complex layouts can exceed $20,000. The cost typically breaks down to approximately $2 to $4 per square foot for a complete rewire, though this can vary based on specific project requirements.

Additional expenses may include electrical panel upgrades (often necessary when replacing knob and tube wiring), which can add $1,500 to $3,000 to your project. Many Orangeburg homeowners take this opportunity to upgrade to 200-amp service, add dedicated circuits for modern needs, or install whole-house surge protection. For an accurate estimate on your Orangeburg home, call Sikes Electrical at (803) 596-3122 to schedule an inspection with a licensed local electrician who understands the specific challenges of older homes in our area.

What Factors Affect Knob and Tube Replacement Costs?

The total cost of replacing knob and tube wiring depends on several key factors that vary from one Orangeburg home to another. Home size is the most obvious factor—more square footage means more wiring, circuits, outlets, and switches to replace, which directly increases labor and material costs.

Accessibility plays a crucial role in pricing. Homes with unfinished basements, accessible attics, and crawl spaces are significantly easier and less expensive to rewire than homes where electricians must open walls and ceilings. Many historic homes in Orangeburg feature plaster walls rather than drywall, which requires more careful removal and specialized repair, adding to the overall project cost. If you have finished spaces on multiple levels with limited access, expect costs on the higher end of the range.

• Number of circuits and outlets: More electrical devices and appliances require additional circuits and outlets
• Panel upgrade requirements: Older homes often need service panel upgrades to handle modern electrical loads
• Permit and inspection fees: Orangeburg County requires permits for rewiring projects, typically costing $100 to $300
• Drywall and plaster repair: Wall and ceiling repairs after running new wiring can add $1,000 to $3,000
• Additional upgrades: GFCI outlets, AFCI breakers, and bringing everything to current code standards

Can You Replace Knob and Tube Wiring Yourself?

Knob and tube wiring replacement is not a DIY project and must be performed by a licensed electrician in South Carolina. This type of whole-house electrical work requires extensive knowledge of electrical codes, proper installation techniques, load calculations, and safety protocols that only trained professionals possess.

In Orangeburg County, electrical work of this magnitude requires permits and inspections to ensure the work meets NEC standards and local building codes. Licensed electricians understand these requirements and handle the permitting process, ensuring your upgraded electrical system is safe, legal, and properly documented. Attempting to replace knob and tube wiring yourself creates serious safety hazards, potential code violations, insurance complications, and could actually decrease your home's value if the work isn't done correctly.

Sikes Electrical employs licensed local electricians experienced in both residential and commercial wiring projects throughout Orangeburg County. Our team regularly works on historic homes and understands the unique challenges these properties present, from working around original architectural features to minimizing disruption during the rewiring process.

What Does the Knob and Tube Replacement Process Involve?

The knob and tube wiring replacement process typically takes three to five days for an average-sized Orangeburg home, though larger or more complex projects may require a week or more. Your licensed electrician will start with a comprehensive assessment of your existing electrical system, identifying all knob and tube circuits, evaluating your electrical panel, and determining the scope of work needed to bring everything up to code.

The replacement process involves running new electrical cables (typically Romex) through your home's walls, attic, and crawl spaces to replace the old knob and tube system. Electricians will install a new electrical panel if needed, add proper grounding throughout the system, install new outlets and switches, and ensure adequate circuits for modern electrical demands. In Orangeburg's older neighborhoods, where homes may have had multiple additions or modifications over the years, electricians may discover mixed wiring types that all need to be addressed for a completely safe system.

After the new wiring is installed, the work must pass inspection by local building officials before walls are closed up. This inspection ensures everything meets current safety standards and is properly installed. Once approved, any necessary drywall or plaster repair is completed, and your home will have a modern, safe electrical system that can handle today's electrical needs while providing peace of mind for decades to come.

How Does Replacing Knob and Tube Wiring Benefit Orangeburg Homeowners?

Replacing knob and tube wiring provides immediate and long-term benefits that make the investment worthwhile for Orangeburg homeowners. Safety is the primary benefit—eliminating fire hazards associated with deteriorating insulation, overloaded circuits, and improper modifications that may have occurred over decades of use in your home.

Insurance accessibility improves dramatically once knob and tube wiring is removed. Many homeowners in Orangeburg discover they can secure better insurance rates or qualify for policies that previously weren't available to them. If you're selling your home, removing knob and tube wiring eliminates a major obstacle that often kills real estate deals or reduces sale prices when buyers demand credits for the replacement cost.

A modern electrical system also supports the lifestyle improvements Orangeburg residents expect, from adding EV chargers for electric vehicles to installing backup generators for storm season, upgrading to energy-efficient heat pumps, or simply having enough outlets and circuits to power today's technology without tripping breakers. Sikes Electrical specializes in panel upgrades, EV chargers, generators, and electrical repairs, making us your complete solution for modernizing your home's electrical system beyond just the wiring replacement.

Frequently Asked Questions

Is knob and tube wiring illegal in Orangeburg, SC?

Knob and tube wiring is not illegal in Orangeburg, SC, and existing installations are grandfathered under current electrical codes. However, it cannot be extended or modified, and most insurance companies will not insure homes with active knob and tube wiring due to safety concerns. Any renovation or addition to your home will require updating the electrical system to current code standards.

How long does it take to replace knob and tube wiring in an Orangeburg home?

Most knob and tube wiring replacement projects in Orangeburg take between three to five days for an average-sized home. Larger homes, multi-story properties, or those with difficult access may require a week or longer. The timeline includes running new wiring, installing a new panel if needed, inspection, and any necessary wall repairs.

Will my homeowners insurance cover knob and tube wiring replacement?

Homeowners insurance typically does not cover the cost of replacing knob and tube wiring, as this is considered a maintenance and upgrade issue rather than sudden damage. However, replacing the wiring often results in lower insurance premiums and makes it easier to obtain coverage. Some insurers may give you a limited time to replace knob and tube wiring if discovered during a policy review.

Can I just replace some of the knob and tube wiring instead of all of it?

You can replace knob and tube wiring in specific areas or rooms, which costs less than a whole-house rewire. However, many electricians and home inspectors recommend complete replacement to ensure safety throughout your home and to maximize property value. Partial replacement may still leave insurance and safety concerns in areas with remaining knob and tube wiring.

Do I need to move out during knob and tube wiring replacement?

Most Orangeburg homeowners do not need to move out during knob and tube wiring replacement, though you should expect some disruption to your daily routine. Your electrician will need to turn off power to different areas of your home during the work, and there will be noise and activity throughout the house. Some homeowners choose to stay with family or friends for a few days for convenience, but it's not required.

Related Articles

Ceiling Fan Installation Cost & Wiring Tips for Sumter SC Homes

Read article →

Electrical Panel Upgrade Cost & Process in Orangeburg, SC

Read article →

EV Charger Installation Cost & Process in Orangeburg, SC

Read article →

Published September 13, 2026 | Sikes Electrical serves Orangeburg, Sumter, Summerville, Bamberg, Holly Hill, and surrounding counties in the SC Midlands.