4-Burner Gas Grill With Side Burner Buying Guide: Features to Consider

Buying a 4-burner gas grill with a side burner means you can run a full meal at once: steaks on the main grate while a pot of baked beans simmers next to you. The extra burner alone is worth the upgrade for anyone who cooks sides or sauces that need steady heat while the grill does the heavy lifting. The best grill for you depends on total cooking area, build quality, burner material, and whether your home is set up for propane or natural gas.

The sections below walk through the features that actually matter, the common buying mistakes to avoid, and what to check before you commit to a model.

What the Side Burner Is Actually For

The side burner is extra cooktop space that lives beside the main grill surface, powered by its own dedicated burner. It’s designed for tasks that need a separate heat zone while the main burners are occupied.

Manufacturers list it as the right spot for sauces, sides, sautéing, and simmering — the things you’d otherwise run back into the kitchen to manage. Some models use the same space as a searing burner for high-heat cooking, but that’s not universal. If you want a serious wok-style blast of heat, check the side-burner output before you buy.

That little burner changes how you use the grill. You stop shuttling between the kitchen and the patio and keep every component of a meal on one surface.

Key Features to Evaluate Before Buying

These are the specifications that separate a grill that lasts from one that frustrates you by the third season.

Total cooking area. A 4-burner layout usually provides between 400 and 600 square inches of primary grate space. That’s enough for a dozen burgers or two large chickens at once. Some grills list a total area that includes a warming rack over the cooking surface, so compare primary cooking space specifically.

Main-burner output. The standard for a 4-burner grill is roughly 30,000 to 45,000 BTU per hour split across the burners. Output alone doesn’t tell you how well the grill cooks — the burner design and hood matter too — but it sets the ceiling for how fast the grill preheats and how well it recovers after the lid opens.

Burner material. Cast stainless steel burners hold up better over time than thinner stamped steel. Look for burners that are welded or otherwise sealed against grease and moisture.

Rigid build. A cart made from welded steel with a porcelain-enameled lid holds up far better than thin stamped sheet metal at the same price point.

Propane or natural gas. This is the one you can’t ignore. Propane grills run on a tank you attach to the regulator; natural-gas units connect to a fixed gas line on your property. Some models are sold as separate propane and natural-gas variants rather than a single convertible unit, so match the grill to your home’s setup before ordering. If you need to verify the gas line connection or the regulator requirements, check the exact model’s documentation first.

Safety Rules That Apply to Every Side Burner

Gas side burners follow strict outdoor-use rules, and the manufacturer documentation is consistent across brands. The side burner is not an indoor cooking appliance. Do not use it inside a house, garage, shed, breezeway, carport, or porch, and keep the area clear of combustible materials, gasoline, and other flammable vapors or liquids.

A few rules from the manuals are worth memorizing:

• Never leave the side burner unattended while cooking.
• Never lean over the burner when lighting it, and keep your face away from the flame area.
• Never use charcoal, briquets, or any solid fuel in a gas side burner.
• Do not cover the grates with aluminum foil, since it blocks airflow, traps heat, and can damage the burner knobs or igniters.

Common Buying Mistakes and How to Avoid Them

The most expensive mistakes happen before the grill ever ships to your house.

Choosing by BTU alone. Total output is one factor among several. A grill with a big number but a cramped cooking area or flimsy burners will cook worse than a better-rounded model with a lower peak output. Balance output against cooking surface and build features.

Getting the fuel type wrong. A propane model won’t run off a natural-gas line without a proper conversion kit, and not every model offers one. Figure out which fuel your home supports before you fall in love with a specific grill.

Assuming every side burner is a searing beast. Output on side burners commonly runs from 10,000 to 13,000 BTU depending on the model. That’s plenty for a sauce pot or a sauté pan, less certain for heavy wok cooking. If searing is the goal, look for models that explicitly label the burner a searing burner.

Skipping the clearance check. Outdoor gas appliances need proper ventilation and clearance from walls, railings, and overhead structures. Measure your patio space before buying so the grill sits safely and comfortably.

Ready to compare specific tested models? See our ranking of the best 4-burner grills with side burners for side-by-side specs and hands-on recommendations.