This page walks through the realities of upgrading an electrical panel in Adams Morgan — the converted-rowhouse situation that makes most of these jobs more than a simple swap, the neighborhood's mixed housing stock, the Historic Preservation Review Board review that applies to exterior work (which is NOT the OGB/CFA process — that one is Georgetown-only), Pepco coordination, and what to expect on install day. If you're past the research phase and want a quote, call (703) 997-0026 or email info@ajlongelectric.com.

When Adams Morgan homeowners call us about a panel upgrade

Most panel-upgrade calls fall into one of these patterns:

  • A converted rowhouse where the load has outgrown a single shared service. One 100-amp panel feeding three kitchens, three sets of HVAC, three households' electronics — breakers trip, the panel runs warm. The fix is a larger service: a single bigger panel, or separating into per-unit services.
  • A condo conversion in progress. The building is being subdivided into units, and each needs its own meter, panel, and clean service — the electrical separation is part of the conversion scope.
  • An FPE or Zinsco panel in a mid-century apartment building. The 1950s–70s stock frequently shipped with these — documented failure-to-trip behavior, flagged by insurers. Replacement gets organized building-wide or unit-by-unit, often by a property manager or association.
  • A renovation or a buyer's inspection that surfaced the problem. A new kitchen, a heat-pump conversion, an EV charger, or a finished basement pushes a marginal panel over the line — or a buyer's inspector flags it before closing. We run the load calc and upgrade what's needed.

What makes panel upgrades in Adams Morgan different

The converted rowhouse is the whole story

Most of Adams Morgan's rowhouse stock was built 1900–1920 as single-family homes and carved into two- or three-unit buildings since. The electrical usually got split in whatever way cost the least: shared circuits crossing units, a sub-fed panel off the main, meters that don't map to who uses the power, a single 100-amp service stretched across the building. So the first job in any panel upgrade here is figuring out what's actually connected to what — and from there the path depends on the goal:

  • Just need more capacity and the units can keep sharing a service? A single larger panel (200A, sometimes 400A for three units) may do it, existing metering left alone.
  • Condo-converting? Each unit needs its own meter and panel — a new meter bank (individual meters instead of one house meter), new feeders, and a clean separation of the downstream wiring so no circuit crosses a unit line. The heaviest version, and where the HPRB question usually comes in, because the new meter bank is often exterior-visible.
  • Mid-century apartment building with FPE or Zinsco panels? The work is replacement rather than reconfiguration — but in a multi-unit building it's still a sequencing problem: which units lose power when, how shared infrastructure is handled, who coordinates with tenants.

A contractor used to suburban single-family swaps will quote the panel and not the untangling — and in Adams Morgan, the untangling is usually the bulk of the work.

Adams Morgan is an HPRB historic district — and that affects the exterior work

Adams Morgan sits in the Adams Morgan Historic District, which falls under DC's Historic Preservation Review Board (HPRB) — the same review authority that covers Cleveland Park and most of the District's historic neighborhoods. (HPRB is not the OGB/CFA process; that one is Georgetown-only, under the federal Old Georgetown Act.) For panel work, HPRB matters when the project changes the building's public-facing exterior — and a condo-conversion service separation usually does, because the new exterior meter bank, the feeders, and the conduit runs to reach each unit are often street-visible. That triggers HPRB review: a design-approval step and several weeks added to the schedule.

Interior panel work generally doesn't trigger HPRB review — replacing a panel in a basement, re-landing circuits, sorting out interior sub-panels changes nothing on the historic exterior. The standard DC electrical permit through the Department of Buildings (DOB) — renamed from DCRA in October 2022 — covers interior work. We pull the DOB permit on every job and add the HPRB application only when the scope touches the visible exterior — which, for a multi-unit conversion, it usually does.

Brick facades, narrow access, and Pepco coordination

The mechanical realities slow any work in a 1900s rowhouse: brick facades have no cavity for conduit, so new feeders to per-unit panels or a relocated meter bank mean surface-mounted conduit along the facade — which HPRB has opinions about (paintable, matching the brick, in locations the board accepts), and which has to be staged on a tight rowhouse block. And Pepco coordinates every service disconnect — any service upgrade or separation requires a disconnect-while-we-work-and-reconnect cycle plus re-metering when the configuration changes; the lead time is a couple of weeks, the outage roughly 4–6 hours per cutover. We handle the Pepco coordination.

After 30 years of work across DC, Northern Virginia, and Maryland — much of it in exactly this converted-rowhouse fabric — we read what a building's electrical actually is, scope the right version of the job, and keep the HPRB step and the Pepco coordination from becoming a mid-project surprise.

What drives the cost of a panel upgrade in Adams Morgan

We don't post a fixed panel-upgrade price on this page because every Adams Morgan job is different — a single-unit interior swap and a three-unit condo-conversion service separation are barely the same project. Call for an on-site quote. Here's what shifts the number up or down:

  • How many units share the service. The biggest single factor. One unit on its own panel is a straightforward upgrade; two sharing a service is meaningfully more (a separation, two panels, two sets of feeders); three is more again. Scope scales with the number of services created or untangled, not just panel amperage.
  • Whether the service entrance needs upsizing. If the service-entrance conductors, meter base, or Pepco lateral are sized for the old load, they have to be upgraded to match the new panel — labor, material, and Pepco coordination on top of the panel.
  • Meter-bank configuration and Pepco coordination. A single house meter is cheapest; individual meters per unit (a condo conversion requires it) means a new meter bank, new feeders, and a Pepco re-metering step. Every cutover adds a coordinated outage and a couple of weeks of lead time; a multi-service separation is several cutovers.
  • HPRB review and facade conduit. A new exterior meter bank, facade conduit, or a relocated weatherhead triggers HPRB review — fees that vary by scope, several weeks added, and conduit to an HPRB-acceptable standard rather than a clean interior chase. Interior-only work avoids all of it.
  • Whether the downstream wiring also needs replacement. A clean separation sometimes reveals circuits crossing unit lines, or shot rubber-and-cloth wiring in part of the building. Re-running those circuits is part of doing it right — scoped after the trace, not assumed.

What happens on install day

A single-unit interior panel swap is a one-day install. A multi-unit service separation is a multi-day project, sequenced unit by unit, after HPRB review (if any) and Pepco scheduling have wrapped.

  1. Pepco coordination. The disconnect window (and re-metering, if the configuration's changing) is arranged in advance; tenants get notice of the outage.
  2. De-energize, remove the old panel(s), document. Breakers labeled and circuits tagged before anything comes off — critical in a converted building where the existing labeling is often wrong.
  3. Install the new panel(s) and service components. New panel(s), main breaker(s), grounding electrode system, bonding, feeders — and for a separation, the new meter bank and re-landed downstream circuits, with no circuit crossing a unit line.
  4. Re-energize and DOB inspection. Pepco reconnects and sets the new meters; DOB schedules the inspection, usually within a few days. We're on-site for it.
  5. Cleanup and walk-through. Old equipment disposed, every circuit labeled in the new directories, and a walk-through with the owner (or the board) of what was done.

If the project includes HPRB-reviewed exterior work, the install is preceded by the review cycle, then the permit, then Pepco scheduling — planned in months, not days.

Related services in Adams Morgan

Panel work in Adams Morgan often pairs with these:

Frequently Asked Questions

How does a panel upgrade work in a converted Adams Morgan rowhouse with multiple units?

First we trace what's actually connected to what — converted rowhouses were usually split in whatever way was cheapest, so existing labeling and metering rarely tell the real story. From there it depends on your goal: keep sharing a service and just need capacity? A single larger panel (200A, sometimes 400A for three units) handles it. Condo-converting? Each unit needs its own meter and panel — a new meter bank, new feeders, and a clean separation so no circuit crosses a unit line. We scope it after the trace.

Do all the units lose power during the upgrade?

It depends on the configuration. A single shared service feeding every unit means the whole building is dark for the 4–6 hour install window — Pepco disconnects at the meter, we schedule to minimize disruption, tenants get advance notice. If the building already has separate per-unit services, we can upgrade one unit's panel without touching the others. Separating a shared service into per-unit services, we sequence the cutovers so the building is fully dark only for the minimum each requires. We walk through the outage plan before scheduling.

How long does HPRB review add to a project with a new exterior meter bank?

A new exterior meter bank, facade conduit, or relocated weatherhead in the Adams Morgan Historic District triggers Historic Preservation Review Board review — typically several weeks for the design-approval cycle, on top of the standard DC Department of Buildings permit timeline. The exact length depends on the review calendar and whether the submission's approved or sent back; we design the meter bank and conduit to a standard HPRB tends to accept, which keeps the back-and-forth down. Interior-only panel work doesn't go through HPRB. We submit the HPRB application and pull the DOB permit. (Adams Morgan is HPRB, like most DC districts — not the OGB/CFA process that applies only in Georgetown.)

What happens if the service entrance is undersized for the new panel?

Then it gets upsized as part of the project — service-entrance conductors, meter base, sometimes the weatherhead, occasionally Pepco's lateral, all rated for the new panel. In a 1900s rowhouse on its original 100-amp service for decades, this is common; the panel and the service entrance are the same vintage. We check the sizing in the quote, so it's in scope from the start — and where the upsized entrance involves street-visible changes, it can pull HPRB review in, which we flag on the walk-through.

My building has Federal Pacific (or Zinsco) panels — how urgent is replacement?

Urgent enough that most insurers flag these panels at underwriting or renewal, and a buyer's inspector will too. Federal Pacific Stab-Lok and Zinsco panels have documented failure-to-trip behavior — the breaker doesn't reliably open under fault, the exact failure mode a panel exists to prevent — so replacement is recommended regardless of capacity. In a multi-unit building it's usually organized as one project (building-wide or unit-by-unit) rather than piecemeal — cheaper to sequence as a single job, and the building's insurer is often pushing for it. We scope it for whoever's initiating: an owner, the board, or the property manager.

Considering a panel upgrade in Adams Morgan?

Call (703) 997-0026 or email info@ajlongelectric.com. We'll trace what's actually connected to what, scope the right version of the job — single panel, service separation, or panel replacement — and give you a real number, not a placeholder.

Call (703) 997-0026 Email info@ajlongelectric.com

Or browse our full panel replacement service or all electrical services in Adams Morgan.