Electrical Panel Upgrade in San Marcos, CA | Landers Electric
With nearly 20 years of electrical experience, Landers Electric proudly provides reliable electrical panel upgrades to homeowners throughout San Marcos, CA, including Discovery Hills, San Elijo Hills, and surrounding North County San Diego communities. Our licensed electricians handle everything from 100- to 400-amp service upgrades to Zinsco and Federal Pacific breaker box replacements and SDG&E permit coordination. Homeowners and businesses trust Landers Electric for safe, NEC- and CEC-code-compliant installations done right the first time.
Need a Trusted Electrician for a Panel Upgrade in San Marcos?
Look no further!
Landers Electric specializes in upgrading electrical panels throughout San Marcos and the surrounding North County San Diego communities.
Whether your electricity is fed from overhead power lines above your home or underground -- which is the standard across most of San Marcos's newer neighborhoods -- we can guide you through the entire process from start to finish.
The goal of this page is to help you understand why you might need an electrical panel upgrade in San Marcos, what size panel is right for your home, how much it costs, and exactly what to expect when you hire us to get the job done.
It is important to state upfront that electrical panel upgrades are extremely technical and dangerous work. They should never be performed by an untrained individual. The information on this page is strictly educational.
When hiring an electrical contractor in San Marcos, always verify their contractor license status with the California State License Board (CSLB) and confirm they carry a general liability insurance policy.
Before we get to the specifics of the electrical panel upgrade process, it is necessary to answer a few questions you might have.
With that, let's get started.
If you use links on this page, Landers Electric may earn a small commission at no additional cost to you.
Adding an EV Charger to Your San Marcos Home?
Many electric vehicle (EV) chargers require a dedicated 40 to 60-amp breaker. If your current electrical panel does not have the capacity or available space, you may need a panel upgrade before installing a charger. This is one of the most common reasons San Marcos homeowners call us for panel upgrades.
San Marcos is one of the fastest-growing cities in San Diego County and is home to California State University San Marcos, along with the rapidly developing North City district just a few minutes from campus. With a young, educated population and a high concentration of dual-income professional households, San Marcos has one of the strongest EV adoption rates in North County. A Level 2 EV charger is one of the most requested upgrades we install across the city.
A Level 2 EV charger requires a dedicated 40 to 60 amp circuit. Unlike many older San Diego County communities, the median construction year in San Marcos is 1996, and a large share of homes were built in 2000 or later. That means most San Marcos homes already come with a 200-amp panel, which is good news. But even a relatively newer panel that is 20 to 30 years old can be at or near full capacity, especially if solar, a hot tub, or other appliances have been added over the years. We always check available capacity before recommending an upgrade.
When it comes to EV chargers, our experience shows that a hardwired unit is more reliable and safer than a plug-in model. Hardwiring reduces outlet wear and ensures the charger operates at its full capacity without interruptions.
For homeowners ready to move forward, here is the EV charger we recommend based on reliability and ease of installation:
Planning to install an EV charger alongside your panel upgrade? In most cases, we can figure out what size panel you need and give you a quote with just a phone call. CALL: (760) 690-7517 or Text Us anytime and we will get right back to you. We will check your panel's capacity, handle all the permits, and make sure your upgrade is done safely and to code.
Need help with your electrical panel upgrade? Call us today for a free quote over the phone!
Signs Your San Marcos Home May Need a Panel Upgrade
Below are a few reasons you might need an electrical panel upgrade or replacement.
Breakers keep tripping
Melted bus bar from a faulty or overloaded circuit
A burning smell is coming from the electrical panel
The electrical panel is physically deteriorating, with rust, corrosion, or visible damage from age
More amperage is needed for added loads such as an electric vehicle charger, oven, fireplace, heat pump, or mini-split system
Adding a solar system or whole-home battery backup, and needing your panel evaluated as part of the interconnection process
Building an ADU on your San Marcos property and needing additional electrical capacity for the new unit
A home inspection ahead of a sale or refinance that flagged the electrical panel as a concern
These are a few of the many reasons you might be thinking about upgrading your electrical panel. Below are some photos of electrical panels that were in desperate need of an upgrade.
The electrical panel and wiring in these photos were in really bad shape. CLICK HERE for more information on electrical wiring.
What a Properly Sized Panel Does for Your San Marcos Property
In short, it gives you room to grow.
Many San Marcos homeowners put their money into the upgrades that show. A remodeled kitchen in a San Elijo Hills home with canyon views. A backyard transformation in Discovery Hills. A garage conversion to support a growing family. Those are all smart investments in a city where home values have appreciated over 113 percent in the past decade, and the median home price now sits above $1 million.
One thing that gets overlooked too often, though, is the backbone of the entire electrical system.
The backbone consists of all the wires and materials you cannot see. The electrical panel is the main part of all of it.
It is not pretty. It is not something your guests will notice. But a properly sized, code-compliant electrical panel is what makes sure that all the new light fixtures, smart switches, EV chargers, solar systems, and other modern devices you install keep working safely for many years to come.
San Marcos is a different kind of city from many of the communities we serve in San Diego County. The median construction year here is 1996, and roughly 40 percent of San Marcos homes were built in the year 2000 or later. That means most San Marcos properties already have a 200-amp panel as standard equipment, which puts many homeowners ahead of where homeowners in older San Diego neighborhoods typically start.
But newer does not mean unlimited. San Marcos households tend to be larger and more electrically demanding than average, with about three members per household and a strong share of dual-income families. Add an EV charger, a solar system, a battery backup, and a few major appliance upgrades to a panel that has been in service for two or three decades, and that panel can reach its limit just as easily as an older one. The difference in San Marcos is usually about adding capacity for new technology rather than replacing a failing or outdated system.
An upgrade gives your San Marcos home the headroom it needs for everything you want to add today and in the years ahead.
Renovating your San Marcos home or adding an ADU? CLICK HERE for more information on our electrical wiring services.
Need help with your electrical panel upgrade? Call us today for a free quote over the phone!
Picking the Right Panel Size for Your San Marcos Home
Electrical panels are sized in amps. The panel you choose will depend on your electrical needs today and your plans for the future.
Below is a breakdown of the most common electrical panel options and why you might choose one over another. This is not a complete list, but it will give you a good idea of which panel is right for your San Marcos home.
125 Amp Panel Upgrade or Replacement
You are not adding any new electrical load and simply need to replace your existing panel. Your 100 or 125 amp panel is damaged or failing and needs replacement. Budget is a concern, and no new loads are being added in the near future
200 Amp Panel Upgrade or Replacement: The Most Common Upgrade in San Marcos
You are not adding any electrical load today but have plans to in the future You want to add one or two new appliances and one electric vehicle charger You are installing a solar system on your property This is the current standard for residential properties and matches what most homes in San Marcos already have, though an older 200-amp panel may still need to be replaced if it is reaching the end of its service life
400 Amp Panel Upgrade or Replacement
You need a 400-amp replacement for an existing large service. You are installing two electric vehicle chargers alongside many other high-demand appliances. You want to fully electrify your home, replacing all gas appliances with electric ones. You are building a full ADU and need significant added capacity for both the main house and the new unit. You are pairing a large solar array with a whole-home battery backup system
Not sure what size panel is right for your San Marcos home? Most homeowners do not want to run load calculations, and you should not have to. CALL: (760) 690-7517 or Text Us anytime, and we will figure it out for you over the phone. No pressure, no guesswork.
San Marcos Electrical Panel Upgrade Pricing
The cost of upgrading your electrical panel depends on your service type and the specific needs of your installation.
Below are the two most common cost ranges for properties in San Marcos and the greater North County San Diego area.
Overhead Service (power lines run above your property with a service drop connecting to the weatherhead above your roof) $3,500 to $5,500
Underground Service (no overhead power lines, panel is fed underground from a ground-mounted transformer) $7,000 to $20,000
Underground service upgrades cost more because they require SDG&E coordination, a trench inspector meeting, conduit installation, and multiple inspections before the job is done. Underground service is the standard across most of San Marcos's newer neighborhoods, including San Elijo Hills, Discovery Hills, and the developments near North City, since these communities were built after underground utilities became the typical standard for new construction.
Additional cost factors include panel amperage (200A vs. 400A), whether stucco or exterior siding needs to be repaired after the installation, and permit fees paid to the City of San Marcos Building Division.
We give you clear, honest pricing before we start. no hidden fees and no surprises at the end.
Watch Out for Unlicensed Electrical Contractors in San Marcos
Before we get into the process, this needs to be said.
Many so-called electricians will offer to do your panel upgrade for a much lower price and tell you it is not necessary to wait for SDG&E to process your service change request, or to pull a permit from the City of San Marcos.
If you run into one of these unprofessional scam artists, send them down the road.
In California, doing an electrical panel upgrade without a permit is illegal. It cancels your homeowner's insurance, puts personal legal risk on you if anything goes wrong, and creates serious problems when you go to sell your home. In a fast-moving market like San Marcos, where homes sell in around 26 days on average, and buyers are doing thorough inspections, unpermitted electrical work is exactly the kind of issue that can stall or kill a sale.
The City of San Marcos requires a permit for all electrical work, including service upgrades, governed by the California Building Code as adopted under the City of San Marcos Municipal Code Title 17. Permits can only be issued to a licensed California State Contractor.
Any real, licensed electrical contractor knows exactly how to handle this process. If someone is telling you a permit is not needed or not worth it, they are cutting corners, and you will be the one dealing with the results.
Always check your contractor's license before signing anything: CSLB License Lookup
How the San Marcos Panel Upgrade Process Works From Start to Finish
Now that we have covered the key questions, it is time to walk through exactly what to expect from the day you call us to the day your new panel passes final inspection.
One important thing to know about San Marcos: San Marcos is its own incorporated city with its own Development Services Department and Building Division. The Building Division oversees permit processing, plan review, permit issuance, and building inspections for both new construction and alterations. You can reach the Building Division by email at Buildingdivision@san-marcos.net or by phone at (760) 744-1050 extension 3244. If you ever lose power entirely and need an emergency repair permit, the City has a dedicated line for that at (760) 744-1050 extension 3249.
SDG&E is the utility provider for San Marcos. All service change requests, trench inspections, and disconnect/reconnect coordination go through SDG&E. We handle all permit applications and SDG&E coordination on your behalf from start to finish.
Below is an outline of the full electrical panel upgrade process. You can click any link to jump to that section.
Request a Service Change From San Diego Gas and Electric (SDG&E)
Waiting Period -- SDG&E Assigns a Planner
Apply For an Electrical Permit Through the City of San Marcos Building Division
Schedule a Pre-Meet With the SDG&E Trench Inspector (Underground Service Only)
Dig the Trench and Install Conduit (Underground Service Only)
Trench Inspection and Backfill (Underground Service Only)
Schedule the Disconnect/Reconnect With SDG&E
SDG&E Power Disconnection
Install the Grounding and Bonding System
Electrical Panel Removal and Installation
Repair Stucco or Siding
Pass the City of San Marcos Final Inspection
Are you ready?
Here we go!
Step 1: Get the Process Started With SDG&E
To get your San Marcos panel upgrade started, you must first submit a service change request to San Diego Gas and Electric (SDG&E), the utility provider for San Marcos and all of San Diego County.
This request tells SDG&E that a service change is planned at your property and starts their review process. Without this step, SDG&E will not be ready to disconnect and reconnect your service on installation day.
Here are the steps:
Go to SDG&E's work order request form website. Fill out all the required information for your installation. Review everything and click submit.
This paperwork is part of the cost of your panel upgrade when you hire Landers Electric. We submit it for you and follow up directly with SDG&E so you do not have to deal with any of it.
Step 2: SDG&E Reviews the Request and Plans Your Job
Once the work order has been submitted, the waiting period begins. How long you wait depends on SDG&E's current workload and the type of service you have.
After the waiting period, your project is assigned to an SDG&E planner. This planner will visit your San Marcos property, look at the installation area, and plan the job.
Once done, the planner will send a detailed report called a work order, with all the requirements for your panel upgrade. This includes:
Panel location, Conduit size, Required clearances, Meter height, Trenching route and depth (for underground service only)
Once the work order is received from SDG&E, it is time to apply for the city permit.
Step 3: Apply for Your Permit With the City of San Marcos
After receiving the SDG&E work order, the next step is to pull an electrical permit through the City of San Marcos.
A PERMIT IS ALWAYS REQUIRED when upgrading an electrical panel in San Marcos.
Many so-called electricians will quote you a lower price and tell you it is not necessary to wait for SDG&E to process your request or to pull a city permit.
If you run into one of those contractors, send them down the road.
All electrical permits in San Marcos are issued by the City of San Marcos Building Division within the Development Services Department. The Building Division can be reached at Buildingdivision@san-marcos.net or by calling (760) 744-1050 extension 3244 for questions about your application. The city has moved to electronic plan submittals for projects requiring plan review, with specific formatting requirements that must be followed.
We handle the entire permit application on your behalf. You do not need to deal with any of this yourself.
Not sure how permits work in San Marcos? CALL: (760) 690-7517 or Text Us anytime. We pull all required permits and handle every piece of paperwork for you.
Step 4: Meet With the SDG&E Trench Inspector (Underground Service Only)
Steps 4, 5, and 6 apply only to underground electrical services.
Before we go further, it is important to understand the difference between overhead and underground electrical services.
An overhead electrical service is easy to spot. Walk outside and look up. If you see power lines above your property with one set of wires running to the conduit above your electrical panel, you have an overhead service.
An underground electrical service has no power lines above the property. If you look around and see green ground-mounted SDG&E transformers nearby, that is a sign you likely have underground service. This is the standard configuration across most of San Marcos, since the city's newer neighborhoods were built after underground utilities became typical for new residential construction.
Now back to Step 4.
After receiving the SDG&E work order and pulling the city permit, the next step for an underground service is to schedule a pre-meet with an SDG&E trench inspector. Their job is to make sure the new underground conduit is installed to SDG&E's standards.
This meeting helps both the homeowner and the electrical contractor understand what is needed for the underground part of the job, so it is done right the first time.
It is important to call Dig Alert (811) before scheduling this meeting. The work area must be marked with white paint before Dig Alert arrives. You will not be able to schedule the trench inspector meeting without a Dig Alert reference number. We take care of all of this for you.
Step 5: Trenching and Conduit Work Begins (Underground Service Only)
Once the SDG&E trench inspector has given all the directions needed for the new underground conduit, work can begin.
The trench is dug, and approximately 90 percent of the conduit is installed. The last 10 percent, the section that goes into SDG&E's handhole or transformer vault, cannot be installed by the electrical contractor. That part is done by an SDG&E crew after the trench is inspected a second time.
San Marcos properties often have HOA-managed landscaping, irrigation systems, and shared common areas that require careful planning during this phase, especially in master-planned communities like San Elijo Hills.
Step 6: Final Trench Inspection and Backfill (Underground Service Only)
As stated in Step 5, once the conduit has been 90 percent installed, the SDG&E trench inspector must be called a second time to approve the last 10 percent of conduit going into the utility handhole or transformer.
Once that inspection passes, the SDG&E service coordinator is called to schedule a crew to come out and finish the conduit.
After SDG&E finishes its part, the electrical contractor fills in the trench and repairs any driveway, sidewalk, or landscaping that was removed during excavation.
Once all repairs are done, the trench inspector must be called one more time to approve a final inspection on the underground work. Once that inspection passes, the panel upgrade moves on to Step 7.
Step 7: Lock In Your Disconnect and Reconnect Date
Steps 4 through 6 were for underground services only. Steps 7 through 12 apply to both overhead and underground services.
This step is scheduling what is called a disconnect/reconnect. The disconnect/reconnect is the date SDG&E will turn off your service so the old panel can be safely removed and the new one installed. This is the main installation day.
The disconnect/reconnect is set up through your assigned SDG&E service coordinator. Once the date is confirmed, the City of San Marcos Building Division is told about the date so an inspector can be scheduled to come to your property the same day.
Step 8: Installation Day Begins With SDG&E Disconnecting Power
Step 8 brings us to the day of the actual panel upgrade.
Early in the morning, an SDG&E crew arrives at your San Marcos property to turn off power at the utility source. This is the only safe way to remove an existing panel, and it is the only way we work.
It is important to remember that about three days before the scheduled disconnection date, Dig Alert (811) should be called to re-mark all underground utilities in the work area, including gas, water, AT&T, Cox Cable, and others.
Step 9: Setting Up the Grounding and Bonding System
The National Electrical Code requires proper grounding and bonding for all new electrical panel installations.
This includes two ground rods, a cold water pipe bond, and an electrical panel connection.
Some electrical contractors prefer to install the ground rods before the utility power disconnection day because a large pneumatic jackhammer is needed to drive both rods 8 feet into the ground. Planning this step keeps installation day running smoothly.
Once the ground rods are in place, an unbroken solid copper ground wire sized according to the National Electrical Code must connect both ground rods, the cold water pipe, and the electrical panel.
Proper grounding is required by code and is what keeps your home and family safe in the event of an electrical fault. If you would rather leave this to a licensed professional, CALL: (760) 690-7517 or Text Us anytime and we will get right back to you.
Step 10: Out With the Old Panel, In With the New
THIS STEP CAN ONLY BE DONE ONCE SDG&E HAS TURNED OFF THE POWER AT THE UTILITY SOURCE.
Once the power has been turned off at its source, the old panel is carefully removed, and the new panel is installed.
If you have an overhead electrical service, a new riser and weatherhead will be installed at least 24 inches above the roofline for the utility connection.
After the installation, a City of San Marcos Building Division inspector visits the site to check that the installation meets the National Electrical Code. If the inspection passes, the city inspector tells SDG&E, and power is restored to your home the same day.
Step 11: Patching the Exterior Wall
Removing an electrical panel requires cutting into the outside stucco or siding of the home.
Once the panel is installed and the inspection is scheduled, the affected area is patched, waterproofed, and finished to match the rest of the exterior as closely as possible. Most San Marcos homes have stucco exteriors, and this type of repair is standard work we handle on every panel upgrade job.
Repairs must be done, and the affected area must be painted before the final inspection can pass.
We handle this repair as part of the job, so your home is left clean and fully protected from the weather.
Step 12: Passing the City of San Marcos Final Inspection
The final inspection is the last step in the electrical panel upgrade process.
A City of San Marcos Building Division inspector reviews the entire completed installation, the panel, grounding system, conductor labeling, stucco repair, and waterproofing to verify it meets the NEC, CEC, and all City of San Marcos requirements.
Remember that all stucco or siding repairs and waterproofing must be done, and the affected area must be painted before the final inspection can pass.
Once the final inspection is approved, the electrical panel upgrade is complete, and your power is permanently restored under your new electrical service.
When you hire Landers Electric, we stay on the job until the city inspection passes and your power is safely restored. CALL: (760) 690-7517 or Text Us anytime and we will get right back to you.
Frequently Asked Panel Upgrade Questions From San Marcos Homeowners
What are the signs that I need an electrical panel upgrade?
Common signs include flickering lights, breakers that trip often, a burning smell near the panel, or a panel that is showing signs of wear. If you are planning to add an EV charger, a solar system, an ADU, or any other high-demand load, those are also good reasons to check your current panel capacity, even if your home is relatively new.
My home was built in the 1990s or 2000s. Why would I need an upgrade?
Most newer San Marcos homes already come with a 200-amp panel, which was the right size when the home was built. But a panel that is 20 to 30 years old and has had an EV charger, solar system, and several major appliances added over time can still reach its limit. We assess available capacity, not just the age of the panel, to give you an accurate answer.
What is the average cost of an electrical panel upgrade in San Marcos?
In the San Marcos area, a standard overhead service panel upgrade typically costs between $3,500 and $5,500. An underground service upgrade is more involved and typically ranges from $7,000 to $20,000, depending on the scope, panel size, and site conditions. Underground service is common throughout San Marcos's newer neighborhoods. Contact us for a specific quote for your property.
Who issues electrical permits in San Marcos?
San Marcos is its own incorporated city with its own Development Services Department and Building Division. The Building Division oversees permit processing, plan review, permit issuance, and inspections. You can reach them at Buildingdivision@san-marcos.net or by calling (760) 744-1050 extension 3244. Landers Electric handles all permit applications on your behalf from start to finish.
How long does an electrical panel upgrade take in San Marcos?
The physical installation is typically done in a single day. The full process, including the SDG&E work order, waiting period, city permit, and all required inspections, can take several weeks from start to finish, depending on SDG&E's current workload and whether your service is overhead or underground.
I am building an ADU in San Marcos. Do I need a panel upgrade?
Often yes. Adding an ADU increases the total electrical load on your property. If your existing panel does not have enough spare capacity to serve both your main home and the new unit, an upgrade will be needed as part of the ADU permitting process. We can evaluate your current panel and advise you before you move forward with ADU plans.
Can I do a panel upgrade myself?
No. An electrical panel upgrade is very technical and dangerous work involving high-voltage power. Permits in San Marcos can only be issued to a licensed California State Contractor. Doing this work without a license means no permit, no inspection, and no legal or insurance protection for you as the homeowner.
Who do I contact for an electrical panel upgrade in San Marcos?
Contact Landers Electric at (760) 690-7517 or visit landerselectric.net. We will look at your situation, give you an honest quote, and handle the entire process from the first SDG&E work order to the final city inspection.
As always, if you need a licensed professional to handle your electrical panel upgrade in San Marcos, please do not hesitate to reach out.
At Landers Electric, we take pride in completing every panel upgrade safely, code-compliantly, and on time, giving you peace of mind that the job is done right.
Stephan Landers | Owner and Master Electrician | Landers Electric
Landers Electric also provides 200-amp electrical panel upgrades for homeowners in Temecula, Murrieta, and surrounding Southwest Riverside County communities. Many homes in these areas require electrical service upgrades to support EV chargers, air conditioning systems, and modern electrical loads.
Learn more about our Temecula electrical panel upgrade services
Looking to future-proof your San Marcos home? We also offer professional EV charger installation in San Diego with licensed electricians handling everything from permits to safe 240-volt wiring.
About the Author
Stephan Landers is a California C-10 Electrical Contractors License holder (CSLB License #1089091) and the founder of Landers Electrical Contracting Inc. With over 20 years of experience, he is dedicated to providing expert advice and quality electrical services in San Diego.
You can view his professional licenses and certifications here:About Stephan Landers
Proud Member of the North San Diego County Chamber of Commerce