Estimated Read Time: 12 minutes
If your home still has knob and tube wiring, you are right to ask about replacement cost. In Austin and Central Texas, knob and tube wiring replacement costs depend on house size, access, plaster repair, and code upgrades. This guide breaks down real‑world ranges, how electricians build estimates, where you can save without cutting corners, and how to plan a smooth, safe project that passes inspection the first time.
What Is Knob and Tube Wiring and Why It Costs More To Replace
Knob and tube, common from the 1880s to the 1940s, uses porcelain knobs to route cloth‑insulated conductors with no grounding. It was acceptable for the loads of the era, but modern appliances, AFCI protection, and today’s code make it obsolete.
Replacement is more involved than a simple wire swap. Electricians must fish new grounded cables, add modern protective devices, and often coordinate wall and ceiling repairs. In Austin, older homes in Hyde Park, Travis Heights, and Clarksville frequently mix plaster, lathe, and retrofitted drywall, which increases labor and patching.
Two hard facts to anchor expectations:
- The National Electrical Code requires grounded receptacles in most finished areas and AFCI protection on many 120‑volt branch circuits. Bringing a K&T home to today’s standard typically adds arc‑fault and GFCI devices to the scope.
- The City of Austin requires electrical permits and inspections for whole‑home rewiring. Passing inspection the first time saves days and reduces rework costs.
Average Knob and Tube Replacement Cost in Central Texas
Every house is unique, but these planning ranges are common in Central Texas for full replacements, including permits and basic wall repair allowances:
- Small bungalow 900 to 1,200 sq ft: 8,500 to 16,000
- Mid‑size home 1,300 to 2,000 sq ft: 12,000 to 24,000
- Larger home 2,100 to 3,000 sq ft: 18,000 to 35,000+
Rule of thumb pricing often falls between 8 to 20 per square foot, depending on access, finishes, and panel capacity. Homes with plaster, detailed trim, or limited attic crawlways land at the higher end. Open attics, pier‑and‑beam crawlspaces, and minimal patching lean lower.
What Drives the Price Up or Down
Expect your estimate to itemize these cost drivers:
- Home size and circuit count
- More rooms and dedicated circuits require more wire, devices, and labor.
- Access and construction type
- Attic clearance, insulation depth, metal conduit stubs, and fire blocks affect fishing time.
- Wall and ceiling finishes
- Plaster and lathe or tiled backsplashes require careful, slower work and more patching.
- Panel condition and capacity
- Many K&T homes need a modern 200‑amp panel or at least a breaker space upgrade to handle new circuits and AFCI/GFCI devices.
- Grounding and bonding
- Installing new grounded branch circuits and verifying the grounding electrode system is essential for safety and insurance.
- Code updates and protection
- AFCI for living spaces and GFCI in kitchens, baths, laundry, and exterior add material cost but reduce fire and shock risk.
- Scope extras
- Lighting redesign, whole‑home surge protection, and new data drops add value but increase budget.
- Permits and inspection fees
- Required in Austin and most Central Texas jurisdictions.
Sample Scope: What a Complete Replacement Includes
A transparent proposal should include:
- Mapping every existing circuit and planning new home runs
- Rewiring all receptacles, switches, and lighting with grounded cable
- Dedicated circuits for kitchen appliances and laundry where required
- New breakers with AFCI and GFCI protection as applicable
- Panel replacement or capacity upgrade if needed
- Grounding electrode system verification and bonding
- Smoke and CO alarm upgrades to current code
- Whole‑home surge protection option
- Drywall or plaster patch allowances and cleanup
- Permit handling and inspection coordination
At SALT, our electricians check every socket, switch, and wire, and ensure your electric panel is up to code and easy to access. We also coordinate lighting retrofits to modern LED fixtures while we are in the walls.
How Austin Permits and Inspections Affect Your Timeline
Rewiring typically spans 3 to 10 working days for most homes, plus inspection windows and patch‑paint. Your schedule depends on:
- Permit lead time and inspection calendar
- Panel upgrade coordination with Austin Energy when required
- Drywall or plaster repair sequencing
- Access to attics and crawlspaces during daytime hours
Tip: Group drywall work right after rough‑in inspection and before trim. This compresses the schedule and avoids rework.
When a Panel Upgrade Is Required
Knob and tube homes often have limited breaker space or outdated fuse panels. If your service equipment is undersized or lacks space for AFCI and GFCI breakers, an upgrade is smart.
- 100‑amp panels can be insufficient for modern loads like EV chargers or induction ranges.
- A 200‑amp upgrade typically adds 2,500 to 5,500+ including materials, permit, new breakers, and labor in our market.
- If your meter base or service mast needs replacement, plan for utility coordination.
Partial vs Full Replacement: How To Decide
You may not need a whole‑home project if K&T is isolated to a few rooms and safely accessible. Consider a staged plan when:
- Attic portions are easy to rewire, but plastered walls require targeted work
- Budget favors tackling kitchens and baths first for safety and insurance leverage
- You plan a remodel soon and can align scopes
Retrofit advantage: targeted rewiring reduces disruption and cost compared to full system replacement. We design partial solutions that still meet code in the areas we touch.
Insurance and Appraisal Considerations
Many insurers restrict or surcharge homes with active K&T. A letter and photos showing complete replacement, grounded receptacles, AFCI/GFCI protection, and permits closed will strengthen insurability and resale. Appraisers in Central Texas often flag ungrounded circuits and old panels. A modernized electrical system protects value and reduces closing friction.
Where Homeowners Can Save Without Compromising Safety
- Bundle scopes. Combine rewiring with lighting retrofits or surge protection to reduce mobilizations.
- Provide access. Clear attics, move furniture, and schedule pet care to keep crews efficient.
- Decide upfront on switch and device styles to avoid change orders.
- Stage drywall patching with a single visit when possible.
- Use SALT+ membership for priority scheduling and discounts on add‑ons.
Why Grounding, AFCI, and GFCI Are Non‑Negotiable
Grounding safely carries fault current. AFCI reduces fire risk from arcing. GFCI reduces shock risk in wet areas. While these protections add cost, they are essential to pass inspection and protect your family. They also help meet many insurer requirements.
Aluminum Wiring and Other Surprises You Might Find
Some older Central Texas homes mix K&T with mid‑century aluminum branch circuits. We diagnose and remediate aluminum wiring issues and can propose approved connector methods or full copper replacement. Finding buried junction boxes, cloth‑rubber insulation, or handyman splices can add time. A thorough pre‑walk limits surprises and clarifies contingencies in writing.
Whole‑Home Surge Protection During Rewire
A professionally installed surge protector will guard against electrical fluctuation like nothing else can. During rewiring, adding panel‑mounted surge protection is cost‑effective and protects sensitive electronics from utility and lightning events common in Central Texas storms.
The Estimating Process: What to Expect With SALT
- In‑home evaluation
- We trace circuits, check the panel, and document access points. Expect photos and a line‑item plan.
- Transparent pricing
- Upfront, written estimate with options for full or staged replacement.
- Permit and schedule
- We handle permits, coordinate inspections, and offer same day or priority windows when possible.
- Dust control and cleanup
- Shoe covers, floor protection, and daily cleanup are standard. We minimize openings and patch what we must open.
- Final testing and documentation
- We label circuits, test GFCI and AFCI, verify grounding, and provide documentation your insurer and buyer can use.
Realistic Budget Scenarios
- Safety‑first starter: Replace the highest risk K&T runs feeding bedrooms and living spaces, add AFCI protection, and convert key receptacles to grounded. 6,000 to 12,000 typical.
- Full modernization: Whole‑home replacement, panel upgrade to 200 amps, surge protection, smoke and CO updates, LED retrofit. 18,000 to 35,000+.
- Remodel aligned: Rewiring bundled with kitchen and bath renovation. Electrical scope 10,000 to 22,000 depending on layout and finish level.
Red Flags When Comparing Bids
- No mention of permits or inspections
- Vague language about grounding and protection devices
- No patch and paint plan
- Lump sum price with no circuit counts or device quantities
- No warranty on labor and materials
Choose licensed, insured electricians and confirm license numbers. SALT operates under TECL #26149 and backs all electrical work with a 100% satisfaction guarantee.
How Long Will You Be Without Power
Most projects keep essential circuits live while we work in zones. Expect brief outages during panel work and individual room shutdowns while we pull new home runs. We coordinate with you daily to protect refrigeration and work‑from‑home needs.
Planning Tips for Central Texas Homes
- Attics get hot in summer. Spring and fall schedules can improve attic productivity.
- Pier‑and‑beam crawlspaces speed fishing on first floors. Slab foundations require more fishing from above.
- Many Austin neighborhoods have narrow alleys and limited parking. Reserving driveway access helps crews move materials faster.
Financing, Membership, and Ongoing Care
Ask about payment options to spread project cost. SALT+ members receive priority scheduling, comprehensive annual inspections across plumbing, HVAC, drain, and electrical, and savings on add‑ons. After your rewire, annual electrical checks keep connections tight and protective devices tested.
Why Homeowners Choose SALT for Rewiring
- Family owned in Austin since 1984 with local neighborhood experience
- Licensed, trained electricians who respect your home and time
- Integrated solutions: rewiring, panel upgrades, surge protection, lighting, data
- Same day service options and clear communication from first call to final inspection
- Upfront pricing and a satisfaction guarantee
What Homeowners Are Saying
"I recently had an electrician conduct a whole-house inspection, and I couldn’t be more satisfied with the service. He provided multiple stages and options for keeping everything safe, up-to-date, and efficient." –Homeowner, Austin
"Our technicians listened to our concerns, performed a full house electrical survey and found the source of our problem. Within 2 hours all was repaired and in working order!" –Homeowner, Round Rock
"After the hvac work we had an electrical service panel and meter replacement/install and once again these guys just knocked it out of the park." –Homeowner, Georgetown
"Justin and Lavell provided phenomenal service installing a whole-house surge protector. They were fast, extremely knowledgeable, and even took the time to educate me and my wife." –Homeowner, Cedar Park
Frequently Asked Questions
How much does knob and tube replacement cost in Austin
Most homes land between 12,000 and 24,000, with small bungalows from 8,500 and larger homes 18,000 to 35,000+. Access, panel upgrades, and plaster repair drive price.
Do I have to replace all knob and tube at once
Not always. We can stage by area, starting with bedrooms and living spaces for AFCI protection. Kitchens and baths follow to add GFCI and dedicated appliance circuits.
Will I need a new electrical panel
If the existing panel lacks space for AFCI and GFCI breakers or is outdated, a 200‑amp upgrade is common. It improves safety, capacity, and resale.
How long does a full rewire take
Typical homes take 3 to 10 working days, plus inspection and patch‑paint. Access, panel work, and finish level affect the schedule.
Will insurance cover any of the cost
Policies vary. Many insurers penalize active K&T. Replacement reduces risk and can improve eligibility. We provide documentation for your carrier.
The Bottom Line
Replacing knob and tube wiring protects your family, your home value, and your insurance options. In Central Texas, expect 8 to 20 per square foot with most projects between 12,000 and 24,000. Ready for a precise, code‑compliant plan that passes inspection the first time in Austin and nearby cities
Talk To an Austin Rewiring Expert Today
Call SALT Plumbing Air & Electric at (512) 956-7842 or visit https://callsalt.com/ to schedule your in‑home assessment. Ask about SALT+ for priority service and member savings. Serving Austin, Round Rock, Georgetown, Cedar Park, Leander, Pflugerville, Kyle, Hutto, Del Valle, and Belton.
About SALT Plumbing Air & Electric
Family owned and serving Austin since 1984, SALT provides licensed, code‑compliant electrical work backed by a 100% satisfaction guarantee. We deliver same day service, upfront pricing, and clean workmanship. Our electricians hold TECL #26149 and coordinate rewiring, panel upgrades, surge protection, lighting, and data. Ask about SALT+ for priority service and member savings.