A gas fireplace is one of the most practical upgrades for a Puget Sound home — instant heat on a wet, gray day with no wood to haul or ash to clean. What installation costs depends mostly on whether you're dropping a sealed insert into an existing opening or setting up a new gas unit, plus the venting and gas-line work involved. This guide breaks down real 2026 installation pricing across King, Pierce, and Snohomish counties and how to get an honest quote.
What gas fireplace installation costs in Seattle
A gas insert installation, fitting a sealed unit into an existing masonry or prefab opening, runs about $500–$1,000. A full gas fireplace installation — a new unit with its venting connected — runs $1,000–$1,500. Your figure depends on the unit you choose, how far the gas line runs, and the venting path. Every project gets a free written quote before we start, a free second opinion if you've been quoted elsewhere, and price-match plus 10–25% on comparable installs.
What drives the price up or down
- Insert into an existing opening versus a fuller new setup.
- The gas unit or insert model and its heat output.
- How far the gas line has to run to reach the firebox.
- Venting: direct-vent through a wall versus up an existing chimney.
- Any finishing or hearth work the opening needs.
An insert reusing your existing opening and a nearby gas line lands at the lower end; a unit needing new venting and a long gas run sits at the top.
Why gas fireplaces suit Puget Sound homes
Our long, damp, chilly season makes an on-demand heat source genuinely useful, and gas delivers it without wood smoke, hauling, or the moisture-driven maintenance a wood firebox needs here. Many Seattle and Tacoma homes have an older masonry fireplace that draws poorly and loses more heat than it makes; a sealed gas insert turns that opening into an efficient heater. Direct-vent models don't rely on the leaky, weather-worn flue that gives so many area chimneys trouble.
How to get an honest installation quote
A real installation quote comes after someone looks at your opening, your venting path, and your gas line — not from a flat phone number. Ask whether an insert at $500–$1,000 will do the job before committing to a fuller $1,000–$1,500 install. A good installer steers you to the option that fits your home and spells out the unit, venting, and any finishing in writing. If another company quoted more than the job needs, take our free second opinion — quotes are free and in writing, backed by price-match plus 10–25%.
What Gas Fireplace Installation Costs in Seattle (2026)
Real 2026 ranges for the Seattle–Tacoma–Everett area, with a free written quote before any work begins.
| Gas insert installation | $500–$1,000 |
| Full gas fireplace installation | $1,000–$1,500 |
| Includes venting connection | in the quote |
Get a free quote
See our full chimney service pricing, or learn more about Gas Fireplace Installation. You get a free written quote before any work begins — call 206-453-2045 or request your free quote online.