Cost to Rewire a House in Phoenix (Aluminum, Cloth and Knob-and-Tube)

Rewiring a house in Phoenix typically costs $8,000 to $25,000 depending on square footage, attic access and how much drywall has to come out. Before you commit, know that a lot of Valley homes flagged for 'bad wiring' need a targeted repair, not a whole-house rewire.

Phoenix rewiring cost by home size

• Under 1,200 sq ft, single story with attic access: $8,000 – $13,000
• 1,500–2,200 sq ft: $12,000 – $19,000
• 2,500 sq ft and up, or two-story: $18,000 – $32,000
• Block homes with no attic run above the ceiling line: add 15–30%
• Panel upgrade performed at the same time: $2,800 – $6,500

Which old wiring actually needs replacing

Aluminum branch wiring (1965–1975)

Extremely common in Phoenix and Mesa homes from that era. The wire itself is not the hazard — the connections are, because aluminum creeps and oxidizes at terminals. A full rewire works, but AlumiConn or COPALUM pigtailing every device is code-recognized and usually costs $1,500 to $4,000 instead.

Cloth-insulated and knob-and-tube

Found in Central Phoenix and Willo-era homes. Cloth insulation crumbles once disturbed and knob-and-tube has no ground, so both are genuine rewire candidates — especially if an insurer is asking.

Signs your home needs attention now

• Two-prong outlets throughout the house
• Warm switch plates or discolored outlets
• Lights that dim when the AC kicks on
• Breakers that trip during summer afternoons
• No GFCI protection in kitchens, baths, garage or exterior