If your Chelsea home still runs on a fuse box, a 60 or 100 amp service, or a panel brand that insurers flag, an upgrade is the single biggest electrical improvement you can make. OSB handles the permit, the utility coordination and the swap.
“They rewired our restaurant kitchen overnight so we never closed a single service. That mattered more than the price, honestly.”
“Garage had one outlet and a light on the house circuit. Now it has a sub-panel and I can actually use my tools.”
“The quote they gave me on the phone was the number on the invoice. That is apparently rare and it shouldn't be.”
A straightforward 100 to 200 amp upgrade in Chelsea usually lands in the low thousands. Cost moves with mast height, meter location, grounding work and whether the utility needs to reset the drop. You get a flat quote before we start.
Most Chelsea panel swaps are a single day, with power off for part of it. Larger service upgrades that need utility scheduling can run into a second day.
Yes — service and panel work is permitted and inspected in Massachusetts. OSB files the paperwork and meets the inspector so you don't have to chase it.
For nearly every single-family home, yes — including one EV charger, a heat pump and an induction range. Very large homes or two EVs sometimes justify 320/400 amp service.
Regularly. Fuse-to-breaker conversions are one of the most common jobs we run in older Chelsea housing stock.
Knob-and-tube and aluminium replacement
See serviceCKT 3PHOffices, retail, restaurants, warehouse
See serviceCKT 15ARecessed, outdoor, LED retrofit
See serviceCKT 24/7No power, sparks, burning smell
See serviceCKT CAT6Automation, structured wiring, hubs
See serviceCKT 100AStandby and whole house backup
See serviceFlat pricing quoted before the work starts. Same-day and next-day slots available across Massachusetts.
What to decide before you book a Level 2 charger install — and the load calculation that decides for you.
ReadGUIDEThe old wiring in your attic, explained — plus what a staged rewire actually looks like.
ReadGUIDEOverload, short circuit or ground fault — each has a different cause and a different fix.
Read