A panel upgrade typically takes 2–5 days from initial inspection to final sign-off, but the entire timeline from hiring a contractor to completion can stretch 2–4 weeks depending on permits and scheduling. Understanding each phase helps you plan realistically and avoid costly delays. This guide walks you through what to expect at every stage.
The Initial Inspection (Days 1–3)
Your first step is scheduling an electrical inspection with a licensed electrician. During this visit, they'll assess your current panel's condition, calculate your electrical load, and determine whether you need a capacity upgrade (typically from 100 to 200 amps) or a full panel replacement.
A standard inspection costs $150–$300 and takes 30–60 minutes. The electrician will check for:
- Breaker tripping patterns
- Signs of corrosion or burn marks
- Outdated or recalled panel models
- Available space for new circuits
They'll provide a written estimate that includes labor, materials, and any necessary permits. This document becomes your baseline for comparing quotes.
Permit and Approval Phase (Days 4–14)
Before work begins, most jurisdictions require electrical permits—especially for panel upgrades. Your contractor typically handles this paperwork, but timeline varies significantly by location.
Permit approval usually takes 5–10 business days. Some municipalities approve same-day or next-day; others take up to three weeks. Budget this uncertainty into your overall timeline. Expect to pay $50–$200 in permit fees depending on your area.
Your action: Ask your contractor upfront how long permits typically take in your jurisdiction and request weekly updates once submitted.
Pre-Work Coordination (Days 15–17)
Once permits are approved, your contractor schedules the actual work. They'll confirm:
- The exact installation date
- Whether you need to clear the area around your panel (usually 3 feet of clearance required)
- Power shutdown duration (typically 2–4 hours for a straightforward upgrade)
- Access requirements for subpanels or outdated wiring sections
If your upgrade includes rewiring portions of your home—common when upgrading to support new circuits for EV chargers, updated kitchens, or HVAC systems—the timeline extends 3–5 additional days depending on scope.
The Installation Day (Days 18–19)
The actual panel replacement is compact. A standard upgrade takes 4–8 hours on-site. Your electrician will:
- Turn off power at the meter
- Remove the old panel housing
- Install the new panel and breakers
- Test all circuits and connections
- Restore power and verify operation
Budget for a brief power outage. Plan accordingly if you rely on medical equipment, refrigeration, or security systems. Many contractors offer generators as an add-on service ($100–$300/day).
Cost for the installation labor typically ranges $1,500–$3,000 depending on panel size and existing wiring conditions.
Inspection and Final Approval (Days 20–21)
After installation, a municipal electrical inspector must sign off. This final inspection verifies code compliance and safety. Schedule this immediately after your contractor finishes—waiting weeks delays your approval.
Final inspection costs $75–$150 and usually happens within 2–5 business days of request. Your contractor can often expedite this.
Total Cost Breakdown
- Inspection fee: $150–$300
- Permits: $50–$200
- Panel and materials: $800–$2,500
- Labor (installation): $1,500–$3,000
- Final inspection: $75–$150
Total typical range: $2,575–$6,150 for a straightforward 100-to-200 amp upgrade with no major rewiring.
Rewiring sections of your home or upgrading service entrance components can add $1,000–$5,000+.
Keeping Your Timeline on Track
Schedule your inspection early, particularly if you're planning seasonal work (electricians book heavily in spring and fall). Ask contractors for written timelines with specific dates, not ranges.
If permits stall, ask your contractor about expedited review options—some jurisdictions offer this for a fee. Request daily progress photos if rewiring is involved.
When comparing contractors, use platforms like Mercoly to review credentials, read verified customer timelines, and compare estimates side-by-side—this eliminates guesswork in your hiring decision.
Frequently Asked Questions
Q: Can I use my electrical panel during the upgrade? No. Power will be shut off for the duration of installation, typically 4–8 hours. Plan for no electricity, water heaters, HVAC, or appliances during this window.
Q: What happens if the inspector fails the first inspection? Common issues (improper grounding, incorrect breaker sizing, code violations) can usually be corrected within 1–2 days at minimal cost. Your contractor should address these at no extra charge if they're their error.
Q: How long do I wait between scheduling and actual work? 2–4 weeks is typical, though this varies by contractor workload and permit speed. Request a firm date during your initial quote consultation.
Ready to hire? Compare verified electricians and their typical timelines in your area today.