Panel Upgrades in Bethesda, Maryland
200-amp upgrades, heavy-ups, sub-panels, and Federal Pacific & Zinsco replacements - done to code and inspected.
DC Electrical Contractor #EM-40-0001168 · MD Master Electrician #7987 · VA Class A Contractor #2705198087 · EPA & OSHA Certified
Pirro Electric handles panel upgrades for homeowners, businesses, and property managers in Bethesda, MD. Work is scoped on site, quoted in writing, permitted, and inspected before we call it done. Typical scope: 100-amp to 200-amp service upgrades ("heavy-ups"), federal pacific stab-lok panel replacement, and zinsco panel replacement.
Bethesda's housing stock skews older and higher-end. Edgemoor, Battery Park, and Sumner have a lot of 1940s-60s brick colonials and ramblers still wired with aluminum branch circuits and running on undersized 100-amp services, sometimes with the original panel never replaced.
When You Actually Need a Panel Upgrade
A 'heavy-up' - moving from 100-amp to 200-amp service - is one of the most common requests we get. You typically need one if you're adding an EV charger, a heat pump or mini-split, a hot tub, an addition, or if your existing panel is full and there's no room for new circuits.
If your panel is a Federal Pacific Stab-Lok or a Zinsco, the answer is simpler: replace it. Both panels have documented histories of breakers failing to trip during overcurrent - a known fire hazard and one that most insurers now flag during inspection.
Why Pirro Electric for Panel Work
Panel work is some of the highest-stakes residential electrical you can hire out - bad workmanship can quietly create fire hazards for years. We're licensed master electricians in MD, DC, and VA, fully insured, and we pull permits on every panel swap. No exceptions.
More detail on scope and pricing: our full panel upgrades & heavy-ups page or the electrical panel upgrade cost in the dmv guide.
What Affects the Price of Panel Upgrades & Heavy-Ups in Bethesda
Every quote is written after an on-site look. These are the variables that move the number:
- Service size (100A → 200A vs. 200A → 400A)
- Overhead vs. underground service drop
- Meter base and service entrance condition
- Panel location (basement vs. exterior wall)
- Permit and county inspection fees
- Whether your current grounding system needs upgrades
Local Conditions We Work Around in Bethesda
Bradley Hills and Westmoreland Hills have larger, later-era homes where owners are adding pools, home theaters, and multiple EV chargers onto services that weren't sized for it. Downtown Bethesda's older office stock along the Bethesda Row corridor needs a steady stream of tenant fit-outs and lighting retrofits as businesses turn over, and older mixed-use buildings often have feeder and panel capacity issues that surface only once a new tenant tries to add real load. All permitting here goes through Montgomery County DPS, with Pepco as the utility for service work.
Bethesda Housing Stock
Bethesda's housing stock is split: pre-war brick colonials and bungalows close to downtown, mid-century ramblers in the wedge north of River Road, and modern teardown-rebuild custom homes scattered throughout. Older homes commonly need a 200-amp service upgrade, knob-and-tube replacement, or grounded outlets throughout.
Permits & Utility Coordination in Bethesda
Permits route through Montgomery County DPS and Pepco coordinates the service drop. Bradley Hills and Edgemoor tree-canopy properties often need underground feeders and careful trenching to protect mature root systems, and downtown condo towers require building-management coordination and after-hours work windows.
Common Panel Upgrades & Heavy-Ups Projects in Bethesda
- 200-amp & 400-amp service upgrades in luxury homes
- Panel upgrades
Neighborhoods servedGlen Echo Heights · Westmoreland Hills · Edgemoor · Battery Park
ZIP codes20814 · 20815 · 20816 · 20817
What's Included
Every job in Bethesda comes scoped, permitted, and inspected - no shortcuts.
- 100-amp to 200-amp service upgrades ("heavy-ups")
- Federal Pacific Stab-Lok panel replacement
- Zinsco panel replacement
- Main breaker panel and meter base swaps
- Sub-panel installation for additions and detached structures
- Whole-home surge protection at the panel
- Panel relabeling and circuit mapping
- AFCI and GFCI breaker upgrades
Panel Upgrades & Heavy-Ups in Bethesda - Common Questions
What Customers Say
Excerpts from verified Google reviews of Pirro Electric.
"Pirro re-wired my whole townhouse, updated the panel, and replaced every outlet and switch. Professional, friendly, and on time. Couldn't ask for a better company."
JMW
Google Review · Verified Homeowner"If you're thinking of going with Pirro - do it. You won't be sorry. I run a medium-sized HOA and wouldn't use any other company for our electric."
Amanda S.
Google Review · HOA Board Director"We use Pirro across our portfolio of 50+ commercial retail buildings. Excellent work, responsive, priced competitively, and they get it right the first time."
Timothy M.
Google Review · Commercial Property ManagerNearby Areas We Serve
Same panel upgrades & heavy-ups crew, next town over.
Related Services in Bethesda
Often booked alongside panel upgrades & heavy-ups.
Ready to Get Started in Bethesda?
Free written quotes. Licensed & insured. Same-week scheduling for most projects.