A 400 amp electrical service upgrade typically costs $4,000-$12,000, with an average near $7,500 for a standard home installation. The final price depends on the existing service, panel location, utility-company work, permit requirements, and how much wiring or equipment must be replaced.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| 400 amp service upgrade | $4,000 | $7,500 | $12,000 | Typical residential project |
| Service equipment and panels | $1,200 | $2,500 | $4,500 | Meter equipment, disconnects, panels |
| Electrician labor | $1,500 | $3,000 | $5,000 | Often 16-32 crew hours |
| Permits and inspection | $100 | $400 | $1,000 | Varies by jurisdiction and scope |
| Utility or site work | $0 | $1,600 | $5,000+ | May include service-line or trench work |
What a 400 amp home service usually costs
Most homeowners pay $4,000-$12,000 for a 400 amp service, including electrician labor, new service equipment, basic permit costs, and connection work. Projects with an accessible meter and an overhead utility connection tend toward the lower end; underground feeds, panel relocation, or extensive repairs can push totals above $12,000.
A 400 amp setup commonly uses two 200 amp panels or a 400 amp-rated distribution arrangement. Equipment pricing varies by brand and configuration, but service equipment and panels often run $1,200-$4,500. Assumptions: U.S. residential property, standard listed equipment, ordinary access, and no major utility transformer upgrade. A 400 amp upgrade is a substantial service replacement, not simply a larger breaker swap.
How panels, wiring, labor, and permits appear on quotes
Quotes may bundle materials and installation, so homeowners should ask whether each item is included. The ranges below describe common portions of a residential project and can overlap when contractors quote a combined package.
| Quote item | Typical price | What it covers | Pricing basis |
|---|---|---|---|
| Meter and service equipment | $600-$2,000 | Meter socket, disconnects, service fittings | Per project |
| Panels and breakers | $600-$2,500 | One or two panels and standard breakers | $300-$1,250 per panel |
| Service conductors and grounding | $500-$2,000 | Conductors, bonding, grounding components | Scope and run length |
| Electrician labor | $1,500-$5,000 | Removal, installation, testing, coordination | $75-$150 per hour |
| Permit and inspection | $100-$1,000 | Electrical permit and required inspection | Local fee schedule |
| Utility and disposal | $0-$5,000+ | Utility work, trenching, old equipment removal | Site-specific |
Labor estimates often assume 16-32 electrician and helper crew hours, though utility coordination can extend the calendar time beyond the installation itself. Confirm whether utility charges, trenching, and replacement of obsolete wiring are included or billed separately.
Which service entrance details can raise the 400 amp price
The distance and type of the service connection have a major effect. A short overhead run with the meter near the panels is typically less expensive than a long underground route; trenching and conduit can add $1,000-$5,000 or more depending on length, paving, and soil conditions.
Panel location and building condition matter as well. Moving equipment more than a few feet, opening finished walls, correcting grounding, or replacing damaged meter-base components may add $500-$3,000. A utility may also require a larger transformer or service-line changes, which can create extra charges or scheduling delays.
Capacity planning affects the design: the electrician should verify the calculated load and whether 400 amps is needed for the home’s actual equipment. Ask for the load calculation and a written list of any work excluded from the base quote.
How long electricians need for a 400 amp installation
A straightforward replacement often takes one workday with a two- or three-person crew, while a complex conversion may require two days or more. The power is normally shut off during the changeover, and utility disconnection and reconnection must be coordinated. Crew labor may cost $75-$150 per hour, with licensed electricians generally at the higher end.
Scheduling depends on permit approval, inspection availability, and the utility’s appointment calendar. If the project requires new underground service or transformer work, the utility portion can add days or weeks to the timeline even when the electrician’s on-site work is brief. Have the contractor specify the expected outage window and who schedules each utility visit.
When utility work or code corrections add separate charges
Permit fees commonly range from $100-$1,000, but local rules determine whether separate inspections or plan reviews apply. Older homes may need grounding and bonding corrections, a compliant disconnect, or other updates identified during inspection; these can add several hundred to a few thousand dollars.
Utility-company charges are not always part of the electrician’s estimate. Ask whether the utility owns and replaces the service drop, meter, or transformer, and whether the homeowner pays for trenching or conduit. Get the utility’s scope and any customer charges in writing before approving the electrical contract.
Three 400 amp quotes for different home conditions
These examples show how access and service routing change the total. They are illustrative estimates, not fixed national prices.
| Project | Scope and labor | Estimated total |
|---|---|---|
| Accessible overhead replacement | Two panels, short service run, 18 crew hours, $90-$120 per hour | $4,500-$6,500 |
| Typical panel and meter conversion | Two 200 amp panels, grounding updates, 24 crew hours, $100-$130 per hour | $6,500-$9,500 |
| Underground service with relocation | Longer conduit route, trenching, wall repairs, 32 crew hours, $110-$150 per hour | $10,000-$16,000+ |
The lowest example assumes no major utility upgrade; the highest includes difficult site work and equipment relocation. Compare proposals using the same panel count, service route, permit scope, and utility assumptions.
How to trim the 400 amp quote without cutting safety
Request at least two or three itemized bids from licensed electrical contractors. Compare equipment ratings, panel configuration, grounding work, labor, permit handling, and exclusions rather than choosing solely by the bottom-line number. Ask whether existing conduits or service routes can be reused if they meet code and are in sound condition.
Keep the scope limited to required electrical work, and avoid adding panel relocation or premium features unless they solve a clear need. If a contractor proposes 400 amps primarily for future flexibility, request a load calculation and compare the cost with a properly designed 200 amp or 320 amp service where permitted and suitable. Do not reduce grounding, disconnect, permit, or inspection work to lower the price.
Scheduling outside a contractor’s peak emergency periods may improve availability, but utility appointments and local workload still affect timing. Have the quote state who handles inspection corrections and whether disposal, patching, and utility fees are included, so a low initial estimate does not become a larger final bill.