If you have been told you need a panel upgrade before installing your EV charger, heat pump, or induction stove, you are probably wondering: how long will this actually take? The answer surprises most homeowners.
The electrician's work itself takes just one day — typically 4 to 8 hours. But the total project timeline from first phone call to completed, inspected upgrade is usually 3 to 6 weeks. In markets with utility backlogs or permit delays, it can stretch to 8 to 10 weeks.
Understanding what takes so long — and where you can speed things up — is the difference between planning your EV charger installation for next month versus next quarter.
⚡ Key Takeaways
- Total project timeline: 3–6 weeks in most US markets (best case: 2 weeks; worst case: 10 weeks)
- The electrician's actual work takes just 4–8 hours on installation day
- Permit approval is the most common source of delays — start the process immediately
- Utility coordination is the biggest wildcard — some utilities respond in 24 hours, others take 2+ weeks
- Do not wait until your EV charger is sitting in a box before starting the permit process
- If your utility needs to upgrade the service entrance, add 4–8 additional weeks to your estimate
Complete Timeline Overview
Here is the full process a 100A to 200A panel upgrade goes through, from first contact to flipping the breakers back on for the last time:
| Stage | Duration | Notes |
|---|
| Stage 1: Get 3 quotes from licensed electricians | 1–2 weeks | Do not skip comparison shopping |
| Stage 2: Permit application submitted | Day 1 after choosing electrician | Usually the electrician handles this |
| Stage 2: Permit approval received | 3–14 business days | Varies dramatically by municipality |
| Stage 3: Utility disconnect scheduled | 2–5 business days after permit | The biggest timeline wildcard |
| Stage 3: Utility disconnect day | 1 day | Power off 4–8 hours during work |
| Stage 4: Electrician installs new panel | 4–8 hours | The actual work |
| Stage 3: Utility reconnect | Same day or next day | Most utilities reconnect same day |
| Stage 5: Final inspection scheduled | 2–5 business days after install | Inspector visits to sign off |
| Stage 5: Inspection passed / permit closed | Same day as inspection (if passed) | |
| Total realistic timeline | 3–6 weeks | Best case 2 weeks; worst case 10 weeks |
Stage 1 — Getting Quotes (1–2 Weeks)
Stage 1
Getting 3 Competing Quotes
⏱ 1–2 weeks
Do not call one electrician and accept the first number they give you. Panel upgrade pricing varies by $500–$1,500 for identical scope of work between contractors in the same market. Getting three written, itemised quotes protects you from overpaying and gives you leverage to negotiate.
💡 Call on Monday and ask each electrician for a quote by end of the week. Three quotes in 5 business days is very achievable if you are organised.
During this stage, every electrician you contact should come to your home to assess the job before quoting. A responsible electrician will not quote a panel upgrade over the phone without seeing your current panel, service entrance, and the complexity of the installation location.
What to provide to each electrician during their assessment visit:
- Your current panel size and location
- What you plan to add (EV charger, heat pump, etc.) and why you are upgrading
- Whether you have a detached garage or outbuilding that needs a subpanel
- Your utility company and account number (so they can check your current service size)
💡 Pro tip: Ask each electrician: "Does my utility currently deliver 100A or 200A service to the meter?" Homes built after about 1990 often have 200A utility service even if the indoor panel is only rated for 100A. If your utility already delivers 200A service, the upgrade is faster and cheaper — no utility coordination needed for the service entrance itself.
Stage 2 — Permit Application and Approval (3–14 Days)
Stage 2a
Electrician Submits Permit Application
⏱ Day 1 after you sign
Once you choose an electrician and sign a contract, they typically submit the permit application within 1–2 business days. Your electrician should handle this — if they suggest skipping the permit, that is a serious red flag.
💡 Ask your electrician: 'When exactly will you submit the permit?' and 'How will I know when it is approved?'
Stage 2b
Municipality Reviews and Approves
⏱ 3–14 business days
This is the most variable stage in the entire process. Small towns with few permit applications may approve electrical permits in 24–48 hours. Large cities with overloaded building departments may take 2–3 weeks. Your electrician will have a sense of local wait times based on their recent projects.
💡 In many jurisdictions, electricians can apply for permits online and receive same-day approval for straightforward residential electrical work. Ask your electrician if your municipality offers expedited review.
⚠️ Never let work start without a permit. Unpermitted panel work is a serious problem. It can void your homeowner's insurance if there is a subsequent electrical fire. It will be flagged during a home inspection when you sell. And in some states, knowingly occupying a home with unpermitted electrical work transfers liability to the homeowner. The permit is not optional — it is protection for you.
Stage 3 — Utility Coordination (1–5 Days)
Stage 3a
Electrician Notifies Utility
⏱ Day 1–2 after permit approval
After the permit is approved, your electrician contacts the utility company to schedule the power disconnection. In most US markets, the utility must disconnect power at the meter before the electrician can safely work on the main panel.
💡 Your electrician handles utility notification in most cases. Ask them which utility company they will contact and confirm they have done so.
Stage 3b
Utility Disconnection Appointment
⏱ 1–5 business days after notification
This is the biggest wildcard in the entire project. Some utilities offer next-day disconnection appointments. Others — particularly in markets with high EV adoption and heavy electrician activity — have 1–2 week backlogs for residential service disconnections. Your electrician will know typical wait times for your utility.
💡 Tip: If your utility is slow, ask your electrician whether they can perform any preparatory work (conduit, panel mounting, circuit relabelling) before the utility disconnect day, to minimise total downtime.
Stage 3c
Utility Reconnection
⏱ Same day or next business day
After the electrician completes the panel installation, the utility reconnects power at the meter. Most utilities reconnect the same day — your power will be off for 4–8 hours total during the installation. In some markets, reconnection is scheduled for the next business day, meaning you spend one night without power.
💡 If you have medical equipment that requires electricity, inform your utility company when scheduling the disconnection. They can sometimes prioritise reconnection or arrange alternative accommodations.
Stage 4 — Installation Day (4–8 Hours)
Stage 4
The Electrician Does the Work
⏱ 4–8 hours
After all the waiting, installation day is straightforward. Here is what happens:
- Utility disconnects power at the meter (morning)
- Electrician removes the old panel
- New 200A panel is mounted and secured
- Service entrance conductors are connected to the new main breaker
- All existing circuit breakers are transferred to the new panel
- New circuits are added as needed (EV charger, etc.)
- Panel is labelled, tested, and documented
- Electrician calls utility for reconnection
- Utility reconnects — power restored
💡 Complex factors that add time: difficult panel location (attic, crawl space), service entrance replacement, older aluminum wiring that requires splicing, or a large number of circuits being reorganised.
A straightforward 100A to 200A panel upgrade with a good crew takes 4–6 hours. Complex jobs can run a full day. The electrician should leave your home with:
- A fully labelled new panel with every breaker identified
- A completed permit card posted at the panel (required by most municipalities)
- Documentation of all new circuits installed
- Power fully restored and verified
Stage 5 — Final Inspection (3–7 Days After Installation)
Stage 5a
Inspection Scheduled
⏱ 1–3 days after installation
Your electrician (or you, if you pulled the permit yourself as a homeowner) schedules a final inspection with the local building department. In most jurisdictions, electrical inspections are available within 2–3 business days of request.
💡 Some municipalities now offer morning/afternoon windows rather than specific times. Plan to be home for a 2–4 hour window.
Stage 5b
Inspector Visit
⏱ 30–60 minutes
The building inspector visits, reviews the permit documentation, examines the panel installation, checks breaker sizing, verifies labelling, and signs off on the work. A quality electrician's work passes first inspection in the vast majority of cases.
💡 If the inspector finds a deficiency, your electrician will correct it and schedule a re-inspection — typically 1–3 additional days. This is uncommon with experienced, licensed electricians.
Stage 5c
Permit Closed — Project Complete
⏱ Same day as passed inspection
Once the inspection passes, the permit is closed and the project is officially complete. Your electrician should provide you with a copy of the final inspection record. Keep this document — you will need it when you sell the home.
💡 Take a photo of the completed, labelled panel and the inspection sign-off for your records.
Common Delays and How to Avoid Them
Understanding what causes delays lets you work around them proactively:
| Delay | Cause | Prevention |
|---|
| Slow permit approval | Municipality backlog | Ask electrician about typical local wait times; some areas offer expedited review |
| Utility scheduling backlog | High demand for disconnections | Start process early; some utilities allow online scheduling |
| Service entrance upgrade required | Old 100A utility service to meter | Ask electrician before signing contract whether utility upgrade is needed |
| Electrician unavailability | High demand in EV install market | Get on their schedule as soon as you sign, before permit even arrives |
| Failed first inspection | Code compliance issues | Use a licensed, experienced local electrician — ask about their first-pass inspection rate |
| Material delays | Supply chain for specific panels | Ask electrician if they have your panel brand in stock before scheduling |
| HOA approval required | Some HOAs require electrical permits | Check your HOA rules before starting; some require their own approval process |
How to Get It Done Faster
If you are on a tight timeline — for example, your new EV is arriving in two weeks — here is how to compress the process:
- Start immediately. Every day you wait before calling electricians is a day added to the end of the project. Call three licensed electricians today.
- Call the permit office directly. Ask your local building department what the current wait time is for residential electrical permit approval and whether expedited review is available. Some jurisdictions offer same-day or next-day approval for straightforward panel upgrades.
- Contact the utility proactively. You or your electrician can call the utility company before the permit is approved to ask about their current disconnection scheduling. Some utilities allow you to get on a waitlist before the permit comes through.
- Choose an electrician who is already familiar with your utility. Experienced local electricians often have utility contacts and can sometimes expedite the scheduling process.
- Consider a Level 1 charger as a temporary solution. While your panel upgrade is in progress, a Level 1 charger (standard 120V outlet) adds 3–5 miles of range per hour — enough to maintain day-to-day driving while you wait for the full installation.
First Step — Check If You Actually Need an Upgrade
Many homeowners find they have more headroom than expected. Run our free calculator before calling any electricians.
⚡ Run Free CalculatorFrequently Asked Questions
Q: Can I do the panel upgrade myself to save time?
A: The actual panel work must be done by a licensed electrician in virtually all US jurisdictions. In some states, homeowners can pull their own permit, but the electrical work itself requires a license. Attempting to work inside the main panel is extremely dangerous — the utility-side connections remain live even with the main breaker off. Do not attempt this yourself.
Q: Will I be without power during the upgrade?
A: Yes, for 4–8 hours on installation day. Your power will be off from when the utility disconnects the meter until they reconnect it after the work is complete. Most people schedule installation day for a weekday when family members are at work and school to minimise inconvenience.
Q: What happens if it rains on installation day?
A: Light rain does not stop panel work in most cases — the panel is inside the home. However, if the service entrance is being replaced (the weatherhead and conduit running outside to the meter), heavy rain may cause a delay. Your electrician will make the call based on safety.
Q: Can I combine the panel upgrade with EV charger installation on the same day?
A: Yes, and this is actually the most efficient approach. Your electrician can install both the new panel and the dedicated EV charger circuit in a single visit, with one permit application, one utility disconnection, and one final inspection covering both. Combined projects typically cost $200–$500 less than doing them separately.
Q: How long does a panel upgrade last before it needs replacing again?
A: A quality electrical panel from a major manufacturer (Square D, Siemens, Eaton) installed correctly should last 30–50 years under normal residential use. You are not making a temporary fix — you are making a long-term infrastructure improvement to your home.
Q: Does the panel upgrade increase my home's value?
A: Yes. A 200-amp panel is listed as a positive feature in real estate listings and is specifically checked by home inspectors. Studies of home sale data consistently show homes with upgraded electrical panels sell faster and at higher prices — particularly in markets with high EV adoption. The upgrade cost is typically recovered in full at resale.