Looking for gas fireplace installation cost in Ontario, CA? Call FireplaceInstallation Services for a contact a provider — no obligation. Licensed, insured certified fireplace pros serve Ontario 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

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

The final price for installing a gas fireplace depends on whether you have existing gas lines, the type of venting required, and the complexity of the unit you select. If you need to run new gas lines or build a new chimney, expect the price to rise. While project totals 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 Ontario

What's the average cost to install a fireplace?

Can I install a fireplace myself?

How do you install a fireplace?

Professional installation typically involves placing the fireplace unit, connecting it to the gas supply, and installing a safe and effective venting system to the exterior. The crew will ensure all connections are leak-free and the unit is tested for optimal performance. They handle all the technical steps.

How much does it cost to install a fireplace?

Do fireplaces need to be professionally installed?

What is the 2 + 10 rule for fireplaces?

The 2+10 rule is a safety standard for clearances around fireplace openings. It requires at least 2 inches of clearance from the opening and 10 inches from the sides to combustible materials. Installers ensure these safety clearances are met during every job.

Also serving nearby: Chino · Rancho Cucamonga · Jurupa Valley · Pomona · Fontana

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

Service area details

182,457residents

3,650per sq mile

4ZIP codes served

Serving all of Ontario — population 182,457; about 3,650 residents per square mile across 50.0 sq mi. ZIP codes covered include 91758, 91761, 91762, 91764.

Neighborhoods served in Ontario: Downtown Ontario, Victoria Park, Central Park, Archibald Ranch, South Ontario — and every surrounding area.