Gas Fireplace Installation Cost in St. Louis, MO

Looking for gas fireplace installation cost in St. Louis, MO? Call FireplaceInstallation Pros for a contact a provider — no obligation. Licensed, insured certified fireplace pros serve St. Louis and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

What affects the price

When you're looking at a new fireplace, the bottom line depends on a few specific things. First, are we working with an existing chimney or venting system, or does everything need to be built from scratch? The type of fuel matters too—gas, electric, or wood-burning units all carry different installation requirements. You also have to consider the finish work, like custom stonework, mantels, or drywall repairs around the unit. Labor complexity is the biggest factor here. We’ll get you the exact pricing confirmed free on the call.

About this service

The cost of installing a gas fireplace depends on whether you have an existing gas line, the type of venting required, and the labor needed for the enclosure. Simple upgrades are typically less expensive than complex projects involving new gas piping or structural changes. Many factors influence the final bill, including the unit size and the complexity of the masonry work. We provide exact pricing confirmed free on the call.

Installing a fireplace in the summer might seem unusual, but it is often the most efficient route. You avoid the peak-season rush, which usually means shorter wait times for an appointment. It is the perfect off-season project to ensure your home is ready long before the first chill of autumn hits. We can get the job done quickly while you focus on other home improvements.

Frequently asked in St. Louis

What's the average cost to install a fireplace in St. Louis?

The cost of installing a fireplace in St. Louis varies based on the chosen model, the complexity of the venting system, and any modifications needed for gas lines. We can provide a detailed quote after assessing your home. Call us for a consultation.

Can I install a gas fireplace myself in St. Louis?

How do you install a gas fireplace?

The installation involves placing the fireplace unit, connecting it to the gas supply, and ensuring proper ventilation for safe operation. The qualified technicians who perform the work will follow all necessary steps and safety protocols.

How much does it cost to install a fireplace?

The price is influenced by the type of fireplace, the required venting, and the overall complexity of the installation. For an accurate cost tailored to your specific needs, requesting a personalized quote is the best approach.

Do fireplaces need to be professionally installed?

What is the 2 + 10 rule for fireplaces?

The 2+10 rule is a safety standard for chimney height, requiring it to be at least two feet higher than any building component within a ten-foot radius. This ensures proper draft and smoke evacuation, a key aspect of professional fireplace installation.

Also serving nearby: O Fallon · Springfield · Columbia · Champaign · Peoria

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More on this: NFPA heating safety — heating equipment fire data.