Cost of fireplace insert installation — St. Louis, MO

Last updated: September 24, 2026

What affects the price

Fireplace pricing depends on your specific setup. If you already have a gas line or a chimney in place, the work is much simpler and cheaper. Installing from scratch requires more labor, including framing, venting, and finishing work with stone or tile. The type of unit—whether it is gas, wood, or electric—also changes the budget significantly. Larger units or custom hearth designs naturally add to the cost compared to basic inserts. We can discuss your project details and get exact pricing confirmed free on the call.

About this service

When you install an insert, you are upgrading an old wood-burning fireplace into a more efficient unit. The price is influenced by the labor required to prepare the firebox, the cost of the insert itself, and any necessary venting components. Projects involving complex masonry or extensive gas line work will fall on the higher end of the scale. While estimates vary, they are typically in the thousands. Exact pricing confirmed free on the call.

Summer might seem unusual for fireplace work, but it is actually the most efficient time to renovate. Contractors are often less busy, meaning you get more attention and faster installation times. By tackling this project now, you skip the waitlists that pop up once the temperature drops. You will be fully prepared well before the first frost arrives.

Frequently asked in St. Louis

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

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

Service area details

Serving all of St. Louis — population 281,754; about 4,565 residents per square mile across 61.7 sq mi.

Neighborhoods served in St. Louis: Central West End, Lafayette Square, The Hill, Tower Grove, Soulard, Downtown West — and every surrounding area.