Installation of gas fireplace cost

Looking for installation of gas fireplace cost in St. Louis, MO? Call FireplaceInstallation Direct 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 budget for a new fireplace, the final number depends on several moving parts. Choosing between a simple electric insert and a complex gas or wood-burning setup changes labor needs significantly. If your home already has a chimney or gas line, costs stay lower. If we need to run new venting, cut into walls, or add custom stonework, the labor and material requirements increase. Every home layout is unique, and we look at your specific space to provide a plan. Exact pricing confirmed free on the call.

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When calculating the cost of installing a gas fireplace, we look at the distance from your gas main to the installation site and the type of venting required. Direct-vent models often differ in price from ventless options due to the hardware needed. Since every home has a different gas setup, we need to see your floor plan to get you the right number. Exact pricing confirmed free on the call.

Installing during the summer is a smart way to prepare for the colder months ahead. While it may seem counterintuitive to think about fire when it is hot outside, this is often the best window to get better pricing on units and shorter wait times. Your fireplace will be ready to go the moment the first chilly evening arrives.

Frequently asked in St. Louis

What's the average cost to install a fireplace?

Can I install a fireplace myself?

How do you install a fireplace?

How much does it cost to install a fireplace?

The cost to install a fireplace in St. Louis depends on the type of fireplace, the complexity of the installation, and any required modifications to your home's structure or ventilation system. To get an accurate price for your specific project, it's best to consult directly with a qualified installer who can assess your individual needs and provide a detailed estimate. They will look at your home.

Do fireplaces need to be professionally installed?

Yes, professional installation is generally required for gas and wood-burning fireplaces in St. Louis to ensure safety and compliance with local building codes. Licensed installers have the expertise to correctly connect gas lines, establish proper ventilation, and perform all necessary safety checks. This guarantees your fireplace operates safely and efficiently. They provide critical expertise.

What is the 2 + 10 rule for fireplaces?

The 2+10 rule is a common guideline for chimney construction, requiring the chimney to extend at least two feet higher than any part of the building within a ten-foot radius. This ensures proper draft and prevents smoke from re-entering the home. Licensed installers in St. Louis are familiar with these important safety regulations.

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

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