Can I live in the house during a whole-home rewire?

Almost always, yes. We stage the work room by room and keep power on in the occupied parts of the home overnight. We'll give you a day-by-day schedule of which circuits are dark so you can plan around the fridge, Wi-Fi, and bedrooms.

Is knob-and-tube wiring safe if it hasn't been touched?

Original, undisturbed knob-and-tube in open joist bays can technically be safe - but in practice almost every older DMV home has had insulation blown over it, junction boxes added, or grounded appliances plugged into ungrounded circuits. Once that's happened, the safe answer is to rewire. Most insurers now require it.

Do I have to rewire the whole house at once, or can I do it in phases?

Phased rewires are common - kitchen and primary bath first during a remodel, the rest of the house in a later phase. We'll map out the safest sequence so each phase is code-compliant on its own and the final phase ties cleanly into earlier work.

Do you cover all of Gaithersburg's ZIP codes?

Yes. We cover 20877, 20878, 20879, 20882, 20883, 20884, 20885, and 20886, including Kentlands, Lakelands, Rio/Washingtonian, Olde Towne, Quince Orchard, Montgomery Village, Crown, and Watkins Mill. Our headquarters is right here on Airpark Road, so this is genuinely our home turf.

What's the most common electrical problem you see in Gaithersburg?

In Montgomery Village and older Quince Orchard homes, it's aluminum branch wiring and original panels, sometimes Federal Pacific, that are past their service life. In Olde Towne, it's outdated knob-and-tube wiring in homes that have been added onto multiple times. In both cases the fix is a proper inspection followed by rewiring or a panel upgrade, not a quick patch.

Gaithersburg, MD

Whole-Home Rewiring in Gaithersburg, 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.

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Licensed & insured 5.0 ★ on Google Family-owned since 2003

DC Electrical Contractor #EM-40-0001168 · MD Master Electrician #7987 · VA Class A Contractor #2705198087 · EPA & OSHA Certified

Whole-Home Rewiring in Gaithersburg, MD - Pirro Electric

Pirro Electric brings 23 years of Maryland electrical experience to every whole-home rewiring job in Gaithersburg. Gaithersburg has one of the most varied building stocks in Montgomery County. Olde Towne Gaithersburg has early-1900s wood-frame houses with knob-and-tube remnants and later add-on wiring that was never brought up to a real standard. Montgomery Village, built mostly in the 1970s and 1980s, has whole clusters of townhomes with aluminum branch wiring and original panels, some Federal Pacific, now decades past their design life. Quince Orchard's larger single-family homes commonly still run on 100-amp services that were fine before central air, home offices, and EV chargers all landed on the same panel. Rio, Washingtonian, Crown, and Watkins Mill represent the newer end: mixed-use buildings and retail spaces that need frequent tenant fit-outs as businesses turn over. All of it runs through Montgomery County DPS permitting, with Pepco as the utility for service and meter work. Being headquartered here in Gaithersburg, this is the territory we know best.

On any given month you'll find our trucks handling service upgrades in montgomery village townhomes and ev charger installs in kentlands & lakelands across Quince Orchard, Montgomery Village, Crown, and Watkins Mill. We pull permits in Gaithersburg, schedule inspections, and walk you through the work so nothing gets left to guess.

Local Angle

Common Whole-Home Rewiring Projects in Gaithersburg

Between jobs around Shady Grove Metro Station and the neighborhoods above, our Gaithersburg crew is on the road every week.

Service upgrades in Montgomery Village townhomes
EV charger installs in Kentlands & Lakelands

Neighborhoods servedQuince Orchard · Montgomery Village · Crown · Watkins Mill

ZIP codes20877 · 20878 · 20879 · 20882 · 20883 · 20884 · 20885 · 20886

Scope of Work

What's Included

Every job in Gaithersburg 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

FAQ

Whole-Home Rewiring in Gaithersburg - Common Questions

Reviews

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 Manager

Read all reviews on Google

Nearby Areas We Serve

Same whole-home rewiring crew, next town over.

Whole-Home Rewiring in Rockville, MD Whole-Home Rewiring in Germantown, MD Whole-Home Rewiring in Potomac, MD Whole-Home Rewiring in Frederick, MD

Related Services in Gaithersburg

Often booked alongside whole-home rewiring.

Ready to Get Started in Gaithersburg?

Free written quotes. Licensed & insured. Same-week scheduling for most projects.

Request a Quote (240) 510-3131