Whole-Home Rewiring in Rockville, Maryland
Knob-and-tube removal, cloth-wiring replacement, and ungrounded 2-prong circuit upgrades for older single-family and townhomes across DC, Maryland, and Northern Virginia.
DC Electrical Contractor #EM-40-0001168 · MD Master Electrician #7987 · VA Class A Contractor #2705198087 · EPA & OSHA Certified
Pirro Electric handles whole-home rewiring for homeowners, businesses, and property managers in Rockville, MD. Work is scoped on site, quoted in writing, permitted, and inspected before we call it done. Typical scope: knob-and-tube (k&t) removal and replacement with modern nm cable, cloth- and rubber-insulated wiring replacement, and ungrounded 2-prong outlet conversion to grounded 3-prong circuits.
Rockville's housing stock runs from 1950s-60s ramblers in College Gardens and Twinbrook to 1970s split-levels and townhomes in Rockshire and New Mark Commons to dense new construction at Town Center and Pike & Rose. The older single-family sections still turn up aluminum wiring, original Federal Pacific and Zinsco panels, and 100-amp services that can't handle a modern kitchen, heat pump, and EV charger at once.
Signs Your DMV Home Needs a Whole-House Rewire
Most whole-home rewire calls we take in the DMV come from houses built before 1970 - bungalows in Takoma Park, Cape Cods in Silver Spring, ramblers in Bethesda and Arlington, rowhouses in Capitol Hill and Mount Pleasant, and pre-war farmhouses in Frederick and Loudoun County. The patterns are consistent: warm or discolored outlets, breakers that trip when two kitchen appliances run together, scorch marks behind switch plates, lights that dim when the HVAC kicks on, and the smell of burning plastic from a junction box.
Two findings almost always trigger a full rewire conversation: visible knob-and-tube wiring in the attic or basement joists, and a denial or non-renewal letter from a home insurer who inspected the property. Once either of those shows up, patching individual circuits is no longer the right answer - it's time to plan a real rewire.
How a Whole-Home Rewire Actually Works
A rewire is staged room by room, not blown through the whole house at once. We sequence the work - typically kitchen and primary bath first, then bedrooms, then living spaces - so power stays on in occupied parts of the home overnight. Most clients live in the home during the work; we coordinate which circuits are dark on which day so you can plan around the fridge, Wi-Fi, and bedrooms.
In finished homes with plaster or drywall, the goal is to fish new cable through existing wall cavities with the minimum number of access holes - typically one or two small openings per circuit, cut cleanly and left drywall-trade-ready. In gut renovations or homes with open basements and accessible attics, we run new homeruns directly to a new or existing panel.
Most single-family whole-home rewires in the DMV take one to three weeks of on-site work, depending on square footage, wall construction (plaster is slower than drywall), how many circuits exist, and whether the panel and service entrance need to be replaced at the same time.
More detail on scope and pricing: our full whole-home rewiring page or the whole house rewire cost in dc, maryland & virginia guide.
What Affects the Price of Whole-Home Rewiring in Rockville
Every quote is written after an on-site look. These are the variables that move the number:
- Square footage and number of stories
- Total circuit count (typical older home: 20–40 circuits)
- Wall construction - accessible (open studs, basement, attic) vs. finished plaster or drywall
- Whether the panel and service entrance need to be replaced at the same time
- Plaster walls (slower fish work, more careful patching) vs. drywall
- Occupied during work vs. vacant
Local Conditions We Work Around in Rockville
Twinbrook and Hungerford also have pockets of two-prong ungrounded outlets left over from the original build. Along Rockville Pike, older strip-retail and mid-rise buildings need tenant fit-outs and feeder work as spaces turn over, while new residential towers near the Metro need EV-ready garage circuits. Every job here runs through Montgomery County DPS permitting, and Pepco is the utility for service coordination and meter work.
Rockville Housing Stock
Heavy concentration of 1950s-60s ramblers and split-levels, plus 1970s aluminum-era garden condos along Rockville Pike and in Twinbrook. Newer copper townhomes dominate King Farm and the redeveloping Town Center.
Permits & Utility Coordination in Rockville
The City of Rockville is its own permitting authority, running in parallel with Montgomery County DPS. We file through Rockville Building Permits for addresses inside city limits and through DPS for everything outside them. Pepco handles the service and meter work either way.
Common Whole-Home Rewiring Projects in Rockville
- 200-amp panel upgrades in 1960s split-levels
- Aluminum-to-copper rewiring in townhome communities
Neighborhoods servedFallsmead · College Gardens · Hungerford · Lincoln Park
ZIP codes20850 · 20851 · 20852 · 20853 · 20855
What's Included
Every job in Rockville comes scoped, permitted, and inspected - no shortcuts.
- Knob-and-tube (K&T) removal and replacement with modern NM cable
- Cloth- and rubber-insulated wiring replacement
- Ungrounded 2-prong outlet conversion to grounded 3-prong circuits
- AFCI and GFCI protection brought up to current NEC code
- Partial rewires staged into kitchen, bath, or addition remodels
- Drywall-aware fish work to minimize wall openings in finished homes
- Master-electrician permit pull and final county inspection
- Post-rewire panel review with circuit mapping and labeling
Whole-Home Rewiring in Rockville - 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 whole-home rewiring crew, next town over.
Related Services in Rockville
Often booked alongside whole-home rewiring.
Ready to Get Started in Rockville?
Free written quotes. Licensed & insured. Same-week scheduling for most projects.