Electrical SafetyJuly 14, 20266 min read

Knob-and-Tube Wiring in DFW: Replacement Cost, Insurance Rules & Real Timelines

Older homes in the historic Fairmount, Ryan Place, and Oakhurst neighborhoods still hide knob-and-tube (K&T) wiring behind their plaster. It's not automatically dangerous when it's intact — but it has no ground, can't be safely buried in insulation, and most Texas home insurance carriers now refuse to renew policies that still have active K&T circuits.

How to Tell If You Have Knob-and-Tube

Ceramic knobs and tubes visible in the attic or basement

Two-prong outlets with no ground on original circuits

Cloth-insulated single conductors running separately (not in a cable)

Home built between 1880 and 1950 with no documented rewire

Knob-and-tube wiring in an attic — ceramic insulators and cloth-insulated conductors

What It Costs to Replace in DFW (2026)

| Home Size | Typical Full Rewire Cost | Timeline |

| --- | --- | --- |

| 1,000–1,500 sq ft | $9,500 – $14,000 | 4–6 days |

| 1,500–2,500 sq ft | $14,000 – $22,000 | 6–10 days |

| 2,500–3,500 sq ft | $22,000 – $32,000 | 10–14 days |

Cost drivers: plaster vs drywall, accessible attic space, whether the panel also needs upgrading (usually yes), and how many outlets you're bringing up to current code (GFCI/AFCI protection required in kitchens, baths, bedrooms).

Why Insurance Companies Care

State Farm, Allstate, USAA, and Farmers all treat active K&T as a non-renewal condition in Texas. They cite:

No equipment grounding path

Original insulation degradation (60–100 years old)

Overheating risk when buried under modern blown-in insulation

Amateur splices from decades of DIY additions

Modern romex NM-B cable installation replacing old wiring

What a Proper Replacement Includes

Full-home walkthrough — we map every circuit before quoting

2. Panel replacement (almost always needed — old K&T homes still have 60- or 100-amp fuse boxes)

3. New NM-B cable run through walls, attic, and crawlspace

4. GFCI/AFCI breakers where code requires

5. Grounded outlets at every location

6. City of Fort Worth or Burleson permit + inspection

7. Insurance letter from a Texas Master Electrician confirming remediation

What Makes K&T Jobs Go Sideways

Fishing new wire through plaster & lath without proper access cuts (patch drywall costs $600–$1,500 separately)

Skipping the panel upgrade — you'll be back in 2 years

Leaving "just a few" abandoned K&T runs in the attic — insurance won't accept partial remediation

Hiring unlicensed labor — the insurance letter won't be honored

Free K&T Assessment

We'll do a free 45-minute inspection, mark active K&T circuits, and give you a fixed bid plus a realistic day-by-day schedule. Call (817) 447-7141 or [request a rewire quote](/get-a-quote).