Gas fireplace installation cost

Looking for gas fireplace installation cost in St. Louis, MO? Call FireplaceInstallation Solutions 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 start planning a fireplace installation, the final bill depends on a few major factors. Choosing between a simple electric unit, a gas insert, or a full wood-burning masonry build creates the biggest difference in cost. You also have to consider the existing setup of your home; running new gas lines or venting through a roof will naturally add labor hours compared to a straightforward swap. Finishing materials like custom stonework or mantel pieces also shift the total.

About this service

Factors that shift this price include whether you need to run new gas lines, the type of venting required, and the complexity of the custom surround or masonry work involved. Larger units or those requiring extensive structural modification will sit at the higher end of the spectrum. We provide exact pricing confirmed free on the call.

Most people do not think about fireplaces in the summer, which makes it the best time for a stress-free installation. You will likely find more convenient appointment times and faster project turnaround. It is the perfect window to handle masonry or venting work while the weather is dry and clear, keeping the process clean and efficient for your home.

Frequently asked in St. Louis

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

The cost to install a fireplace in St. Louis varies depending on the unit's type and complexity of installation. Considerations like running gas lines or modifying existing structures can affect the price. A professional assessment will provide a precise quote for your home.

Can I install a fireplace myself in St. Louis?

How do you install a fireplace?

Installation involves selecting the location, installing the firebox, connecting gas or wood fuel sources, and ensuring proper ventilation to the outside. The crew that comes out is skilled in all these aspects. They'll ensure your St. Louis fireplace is safe and functional.

How much does it cost to install a fireplace?

The price is determined by the fireplace model, features, and the installation work required. Labor, materials, and any necessary structural adjustments are factored in. To get an accurate cost, call us for a personalized quote.

Do fireplaces need to be professionally installed?

Yes, especially gas fireplaces, professional installation is critical for safety and optimal performance. The specialist you'll speak with is trained in all safety regulations. They'll ensure your St. Louis fireplace is installed correctly.

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

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