Low-voltage landscape lighting installation typically costs between $1,500 and $7,500 or more for most metro Atlanta homes, depending on the number of fixtures, the transformer size, wire runs, and whether new 120-volt electrical work is needed. If you already have a GFCI-protected outdoor receptacle, the project is simpler. If you need a new circuit or outlet, a licensed electrician handles that portion, and the price goes up accordingly.
For homeowners in Lawrenceville, Lilburn, Duluth, Snellville, and the rest of Gwinnett County, landscape lighting is more than decoration. Homeowners who need an electrician in Auburn can call on the same team for landscape lighting and wiring projects. It adds usable hours to your yard, highlights mature landscaping, and improves safety along walkways and driveways. Georgia’s long, warm evenings make outdoor lighting especially practical from spring through fall. And because many Gwinnett homes date back several decades, the condition of your existing electrical system can directly affect what the project involves.
How Low-Voltage Landscape Lighting Systems Work
A low-voltage landscape lighting system has three main components: a transformer, low-voltage wiring, and the fixtures themselves.
The transformer is the heart of the system. It steps your home’s standard 120-volt power down to 12 or 24 volts, which is what the fixtures use. Transformers come in different wattage capacities, commonly ranging from 150 watts up to 900 watts or more. The right size depends on how many fixtures you plan to run and their combined wattage. A general rule is to keep total fixture wattage at about 80% of the transformer’s rated capacity, leaving a buffer to prevent overheating.
Most residential transformers are plug-in units that connect to an existing outdoor GFCI-protected receptacle (the type of outlet with “Test” and “Reset” buttons, designed to cut power if it detects a ground fault). Some larger or more advanced transformers are hardwired directly into your home’s electrical system. Hardwiring requires a licensed electrician because it involves work on the 120-volt side.
From the transformer, low-voltage cable runs underground to each fixture. This cable must be rated for direct burial and is typically buried 6 to 10 inches deep. Deeper burial protects the wire from shovels, aerators, and routine yard work. All connections between cables and fixtures need waterproof, weather-rated connectors to prevent corrosion and shorts, especially given metro Atlanta’s humidity and heavy rain.
Fixture Types and Where They Work Best
The fixtures you choose shape both the look and the cost of your system. Here are the most common types for residential landscapes.
Path Lights
Path lights are the most recognizable landscape fixture. They stand 14 to 24 inches tall and cast a soft downward glow along walkways, driveways, and garden borders. They are practical for safety and work well in nearly every Gwinnett County yard.
Spotlights and Accent Lights
Spotlights produce a focused beam, ideal for highlighting a specific tree, architectural feature, or garden focal point. Adjustable models let you direct light exactly where you want it. These are often the fixtures that give a landscape lighting design its wow factor.
Wash and Well Lights
Wash lights cast a broader, softer glow across a wall or fence, creating ambient light. Well lights are installed flush with the ground and aim upward, often used to illuminate trees from below. Well lights require more labor to install because they sit in a recessed housing.
Deck and Hardscape Lights
Small, low-profile fixtures designed to mount on deck posts, stair risers, or retaining walls. They add subtle accent lighting and improve safety on steps and transitions.
Fixture materials also affect cost and longevity. Solid brass and copper fixtures weather gracefully and can last decades. Aluminum is lighter and less expensive but may corrode faster in Georgia’s humid climate. Plastic fixtures are the most affordable upfront, but they tend to degrade under UV exposure and may need replacing within a few years.
What Drives the Cost Up or Down
As mentioned above, total project cost for professional installation in metro Atlanta generally falls into these ranges:
A basic system with 5 to 10 fixtures, a standard transformer, and straightforward wire runs typically costs $1,500 to $3,500. A mid-range system with 10 to 20 fixtures, a mix of fixture types, and possibly multiple zones runs $3,500 to $7,500. Larger or premium systems with 20-plus fixtures, smart controls, high-end materials, and extensive trenching can exceed $7,500 to $15,000.
Several factors push costs higher. Long wire runs require more cable and heavier gauge wire (such as 10-gauge instead of 12-gauge) to prevent voltage drop, which causes fixtures far from the transformer to appear dim. Rocky soil, tree roots, and working around existing irrigation systems or hardscaping all increase labor time. Premium fixtures in brass or copper cost more per unit. Smart controls, Wi-Fi connectivity, and multi-zone dimming add both hardware and setup costs.
On the other hand, costs stay lower when you have an accessible GFCI outdoor outlet already in place, shorter wire runs, simpler layouts, and fewer fixtures. Choosing quality aluminum fixtures over brass can also reduce the per-fixture price without a dramatic drop in durability.
One significant cost factor that catches homeowners off guard is the 120-volt electrical work. If your home does not have a properly located, GFCI-protected outdoor outlet near where the transformer will sit, a licensed electrician needs to install one. If a dedicated circuit or panel modification is needed, the scope and cost increase further. Homeowners in older Gwinnett County homes may find that addressing hidden issues in their existing wiring is a necessary first step before adding any new outdoor load.
Permits, Code, and What Requires a Licensed Electrician
Here is where it helps to draw a clear line between two sides of the system.
The low-voltage side (everything after the transformer, operating at 12 or 24 volts) typically does not require an electrical permit in Gwinnett County or most metro Atlanta municipalities, as long as it stays below 50 volts and does not involve changes to your household wiring. This is the portion that a handy homeowner can potentially handle: trenching, laying cable, connecting fixtures, and plugging in the transformer.
The 120-volt side is a different matter entirely. Installing a new outdoor receptacle, extending or adding a circuit, hardwiring a transformer, or modifying your electrical panel all require an electrical permit and must be performed by a licensed electrician in Georgia. This is not just a recommendation; it is state law. You can verify any contractor’s license through the Georgia Secretary of State’s licensing division. Kalahari Electrical Services holds Georgia Electrical Contractor License EN213186.
Even on the low-voltage side, common mistakes can cause real problems. Overloading the transformer by connecting more fixture wattage than it is rated for leads to dim lights, overheating, and premature failure. Using the wrong wire gauge for long runs causes noticeable voltage drop. Burying wire too shallow leaves it vulnerable to a single pass with a garden spade. And skipping waterproof connectors in a climate as humid as Atlanta’s is a recipe for corrosion and system failure within a couple of seasons.
The National Electrical Code (NEC) requires that all outdoor 120-volt receptacles be GFCI-protected. If you are plugging a transformer into an outdoor outlet that lacks GFCI protection, that outlet needs to be upgraded before you proceed.
Protecting Your System from Georgia Storms and Surges
Metro Atlanta’s storm season, stretching roughly from late spring through early fall, brings frequent thunderstorms and lightning. Power surges from lightning strikes are one of the most common causes of transformer and control module failure in landscape lighting systems.
A whole-home surge protector, installed at your electrical panel, is one of the best defenses. It protects not just your landscape lighting but every appliance and electronic device in your home. If you are interested in how that works, our guide to whole-home surge protectors for Atlanta homeowners covers the details. For plug-in transformers, adding a quality outdoor-rated surge strip provides an extra layer of protection.
Beyond surges, heavy rain can erode soil and expose shallow-buried wiring. Fixtures rated for wet locations (not just damp) hold up far better in Georgia’s climate. The Electrical Safety Foundation International offers practical guidance on outdoor electrical safety that is worth reviewing before any outdoor electrical project.
Choosing quality fixtures and proper installation methods upfront saves money and hassle over time. Replacing a corroded, bargain-priced fixture every two years costs more in the long run than installing a durable brass unit that lasts a decade or longer.
When to Call a Professional for Your Landscape Lighting Project
If you already have a working, GFCI-protected outdoor outlet near your desired transformer location, and you are comfortable with basic trenching and wire connections, the low-voltage portion of a landscape lighting install can be a reasonable weekend project. Follow the manufacturer’s instructions carefully, use the correct wire gauge for your run lengths, and make every connection waterproof.
But for most homeowners, especially those in older Gwinnett County homes, the project is worth doing professionally. A licensed electrician ensures the 120-volt supply is safe and code-compliant, sizes the transformer correctly, plans wire runs to minimize voltage drop, and selects fixtures that will hold up in our climate. If your home’s panel is already near capacity, or if you are considering whether your electrical service needs an upgrade, a professional assessment before adding any new circuits is especially important.
Kalahari Electrical Services handles both the 120-volt electrical work and the full landscape lighting installation for homeowners across Lawrenceville, Lilburn, Duluth, Suwanee, Snellville, and greater metro Atlanta. If you have questions about what your home needs, or you would like an estimate, give us a call at 678-665-2309 or reach out through our contact page. We are happy to walk through your options and help you figure out the right approach for your property.
Frequently Asked Questions
Do I need a permit to install low-voltage landscape lighting at my Gwinnett County home?
The low-voltage wiring and fixtures (operating at 12 or 24 volts) typically do not require an electrical permit in Gwinnett County. However, if the project involves installing a new 120-volt outdoor receptacle, adding a dedicated circuit, or hardwiring a transformer into your home’s electrical system, an electrical permit is required and the work must be done by a licensed electrician. It is always a good idea to check with your local building department if any 120-volt modifications are planned.
What kind of transformer do I need, and where should it go?
Your transformer needs to be rated for at least 20% more wattage than the combined wattage of all your fixtures. For example, if your fixtures total 200 watts, choose a transformer rated for at least 250 watts. The transformer should be mounted near a GFCI-protected outdoor outlet, in a location that stays accessible for maintenance but is not in a flood-prone area. If it will be exposed to weather, it must be listed for wet locations.
How can I protect my landscape lighting from Atlanta’s thunderstorms and power surges?
A whole-home surge protector installed at your electrical panel is the most effective defense against lightning-related surges. For plug-in transformers, an outdoor-rated surge strip adds another layer of protection. Choose fixtures and connectors rated for wet locations, and bury cables at least 6 to 10 inches deep to guard against erosion and accidental damage during storms.