It doesn't trip breakers every day. It doesn't smell like burning wire. It doesn't do anything dramatic enough to make you pick up the phone.

That's the problem.

A 100-amp electrical panel on a multifamily or single-family property in Los Angeles isn't just an outdated piece of equipment — it's a silent liability that is actively working against your property value, your insurance position, your tenant retention, and your ability to execute any meaningful capital improvement. And because it fails quietly, most property owners don't find out what it's costing them until a buyer's inspector flags it, an insurer demands an upgrade, or a permit gets denied.

If your property was built before 1990 and hasn't had an electrical service upgrade, there's a high probability you're running a 100-amp panel. Here's what that actually means — and what it's costing you right now.

What a 100-Amp Panel Was Designed For — and What It Faces Today

When most of LA's existing housing stock was built, 100-amp service was considered adequate for a typical residential unit. The electrical load of a 1960s or 1970s apartment was modest: incandescent lighting, a refrigerator, a gas stove, window AC units, and a few outlets. Total demand rarely approached the panel's rated capacity.

The electrical load profile of a 2025 residential unit looks nothing like that.

Central HVAC systems. Induction cooktops. Heat pump water heaters. EV charging in the garage. High-efficiency washer/dryer units. Home office equipment running 24 hours. Smart home infrastructure. Each of these draws more sustained amperage than an entire 1960s apartment's baseline load — and modern tenants don't consider them optional.

A 100-amp panel serving a multifamily building today isn't running at comfortable capacity. It's running near its ceiling, continuously, with no headroom for additional load. That condition has consequences that go well beyond the panel itself.

The Insurance Problem Nobody Warns You About

This is where property managers and real estate investors need to pay close attention.

Insurance carriers have become increasingly aggressive about electrical service conditions on older properties. Underwriters at major carriers now routinely flag 100-amp panels — particularly Federal Pacific Stab-Lok panels and Zinsco panels, both of which were installed extensively in LA construction through the 1980s — as elevated fire risk. Some carriers will issue a policy with a written requirement to upgrade the panel within 30 to 90 days. Others will non-renew at the next policy anniversary.

A forced non-renewal doesn't just mean finding new coverage. It means finding new coverage as a property with a documented electrical deficiency — which routes you into surplus lines markets with substantially higher premiums, higher deductibles, and less favorable claims handling. The panel upgrade you deferred for two years can cost you three to five years of elevated insurance costs.

What most owners don't know: you are not always notified proactively when your insurer identifies this condition. The flag may sit in your underwriting file, surfacing only at renewal — or after a claim, when coverage is contested on the basis of a known electrical deficiency.

The Permit Denial Problem

Los Angeles has become one of the most active ADU and addition markets in California. If you own a property in LA and you're planning any capital improvement — an ADU, a kitchen remodel, a panel-fed EV charging station, a rooftop deck with electrical — your existing electrical service capacity is going to be reviewed as part of the permit process.

LADBS and LADWP both evaluate service capacity at permit submission. If your existing 100-amp service is insufficient to support the proposed load of the improvement, the permit cannot proceed until the service upgrade is completed and approved. This is not a discretionary review. It is a hard stop.

The consequence: a property owner who budgets $150,000 for an ADU and assumes a nine-month timeline discovers at plan check that a panel upgrade is required before the ADU permit can be issued. The upgrade adds cost, adds LADWP coordination time, and pushes the project start date — sometimes by months.

At SKS, we see this scenario constantly. It is entirely avoidable with a proactive panel assessment before any improvement project is scoped.

The Tenant Retention Problem

Modern tenants — particularly in LA's competitive rental market — are making leasing decisions based on infrastructure, not just finishes. EV charging capability is now a standard question from prospective tenants in Los Angeles. Buildings that cannot offer Level 2 EV charging, or that have insufficient panel capacity to support tenant-installed EV equipment, are losing qualified tenants to buildings that can.

The same applies to central HVAC. Properties relying on window units because the panel can't support a mini-split system are at a structural disadvantage in the rental market. Tenants with options — and in most LA submarkets, quality tenants have options — are choosing the building with the infrastructure.

A 100-amp panel isn't just an electrical deficiency. It's a competitive disadvantage in your leasing market.

The Property Value Problem

Here is where it all converges.

Sophisticated buyers — and their inspectors — know exactly what to look for. A 100-amp panel on a multifamily property triggers an immediate discount conversation. Buyers model the cost of the upgrade, add a risk premium for deferred maintenance, and negotiate accordingly. In a market where cap rates are thin and every dollar of NOI matters, a flagged electrical system can meaningfully move the price.

More importantly: a 100-amp panel signals something to buyers beyond the panel itself. It signals that the owner has been managing to a minimum standard — that other building systems may be similarly deferred. Whether or not that's true, the perception is expensive.

Properties with upgraded 200-amp, 400-amp, or 800-amp service — depending on building size — signal the opposite. They signal an owner who invests in infrastructure. That positioning commands better offers, cleaner inspections, and faster closes.

What "Upgrading Your Panel" Actually Means in 2025

A panel upgrade is not simply swapping one box for another. A proper electrical service upgrade in Los Angeles involves:

Service capacity assessment — Determining the correct amperage for your existing and projected load, factoring in any planned improvements, EV infrastructure, or unit additions. Undersizing the upgrade creates the same problem in five years.

LADWP coordination — The utility must approve and install upgraded service to your meter base before the new panel can be energized. This requires a separate LADWP application, an engineering review, and a field inspection. Firms that don't manage this in-house routinely create delays here.

LADBS permit and inspection — The panel work requires a building permit, a licensed electrical contractor, and city inspection at rough and final stages. Self-permitted or unpermitted panel work creates title issues and insurance exposure.

Load center and subpanel work — In multifamily buildings, a service upgrade often requires coordination between the main service entrance and individual unit subpanels. The scope must be assessed holistically, not just at the meter.

SKS Construction handles all of it. Our in-house team manages LADWP coordination, LADBS permitting, and construction under one contract — with direct panel supply that eliminates the lead-time delays that hit contractors working through distribution.

How to Know If Your Panel Is the Problem Right Now

You don't need to wait for an inspector to tell you. Ask yourself:

Do breakers trip when multiple appliances run simultaneously? Have you been told you can't add an EV charger without an upgrade? Did a recent permit application get flagged for insufficient electrical service? Is your panel a Federal Pacific, Zinsco, or original builder panel from before 1985? Are you running window units because central HVAC isn't feasible on your current service?

If the answer to any of these is yes, you are not managing a future risk. You are managing a current one.

SKS Has Upgraded Hundreds of Panels Across Los Angeles

SKS Construction has been engineering and building in Los Angeles since 1987. Our electrical panel upgrade work spans 200-amp residential service upgrades to 800-amp-plus service entrances on large multifamily properties. We handle LADWP coordination, LADBS permitting, direct panel supply, and construction under one fixed-price contract.

No subcontracted electricians working off a handoff. No permit expediters managing a process they didn't design. Our in-house licensed engineer reviews every service upgrade for load adequacy, code compliance, and future-proofing — because an upgrade that doesn't account for your next ten years of property improvements is an upgrade you'll be doing again.

39 years. Over 3,000 completed projects. 80% repeat clients. One name.

Get a FREE Electrical Panel Assessment — Before It Costs You More

If your property is running on a 100-amp panel — or if you're not certain what service capacity you have — SKS Construction offers FREE electrical panel assessments for property owners and managers across Los Angeles County.

Our team will evaluate your existing service capacity, identify any LADWP or LADBS flags, and provide a fixed-price upgrade proposal that accounts for your current needs and future improvement plans.

Call (818) 855-1181 or email info@sksconstruction.com to schedule your FREE assessment today.

The panel that's been quietly working against you? We can fix it in weeks — not months.

SKS Construction | Design | Engineer | Build | Since 1987 (818) 855-1181 | info@sksconstruction.com