Gas Fireplace Installation in Seattle
New gas fireplace installation, wood-to-gas conversions, and gas inserts — handled end to end. Licensed WA gas technicians manage the gas line, venting, permits, and code compliance. From site assessment through final safety test, we do the full scope so you don't coordinate multiple trades.
Installation Types
- Gas fireplace inserts
- New built-in gas fireplaces
- Direct-vent installations
- B-vent installations
- Wood-to-gas conversions
- Gas log conversions
Some words from our happy customers
325+ five-star reviews across Google, Thumbtack, Yelp & Angi
“Genesis Home Services came out for a brief inspection before providing thorough advice and instructions. Professional, honest, and helpful — I wouldn't think twice about using this company again.”
Jake Hamilton
Google review
“Our built-in wood-burning stove with a 2-story Class A chimney was thoroughly cleaned by Genesis Home Services. He outlined his methodology, findings, and suggestions in detail. Outstanding service.”
Theo Mitchell
Google review
“David did an excellent job doing a clean up and tune up of our very old gas fireplace. He spent time explaining how to best operate and maintain the fireplace. Very knowledgeable and professional.”
Reza B.
Thumbtack review
Our Work
Gas Fireplace Installation Examples
Log sets, glass media, inserts, and built-ins across Seattle and the Eastside
Licensed WA Gas Technicians
Permitted and Code Compliant
Every gas fireplace installation is permitted, inspected, and completed by licensed Washington State gas technicians. Free on-site estimate before we start.
Get a Free Estimate →Installation Scope
Types of Gas Fireplace Installations We Handle
Different homes call for different installation types. We install the configuration that fits your existing structure, your venting options, and the look you want. Every install is handled by licensed WA gas technicians from site assessment through final safety test.
Gas fireplace inserts
Goes into your existing masonry opening, using the firebox and chimney you have.
Built-in gas fireplaces
A new fireplace in a wall or custom spot. Framing, venting and finish work.
Direct-vent fireplaces
Air in and exhaust out through one sealed pipe. No room air used.
B-vent (natural draft) units
Vertical vent, draws room air. Less efficient, fine in the right setup.
Wood-to-gas conversions
A gas insert plus a properly sized stainless liner in your existing fireplace.
Gas log conversions
Lighter touch. A log set in the existing firebox with a gas line run to it.
Natural gas installations
If you have utility gas, this is almost always the better choice.
Propane installations
For homes without gas service. Needs an exterior tank and a regulator.
Replacement of failed units
Old unit out, new one in, same location.
Our Process
What's Included in a Gas Fireplace Installation
Gas fireplace installation involves multiple trades — gas piping, venting, electrical, framing, finish carpentry. We do all of it under one project so you're coordinating one company, not three.
01
Site assessment
On-site visit to evaluate the existing space, verify gas service availability, assess venting options, check for structural considerations, and discuss what you want from the new unit. Foundation of the project.
02
Measurements & design
Detailed measurements of the install location, chimney (if existing), and vent routing path. Confirmation of unit sizing relative to the room's heating load and the available space.
03
Unit recommendation
We recommend specific models that fit your space, your budget, and your aesthetic. We service all major brands — Napoleon, Heat & Glo, Heatilator, Valor, Regency, Montigo — and we don't push one manufacturer.
04
Gas line work
Running new gas line from your existing supply to the fireplace location, or extending an existing line. Includes pressure testing, leak detection, and shutoff valve installation per code.
05
Venting installation
Direct-vent piping, B-vent, or chimney liner — sized and routed per the manufacturer's specifications and local code. All venting requires inspection before the unit is operational.
06
Electrical hookup
Power for the blower, ignition controls, remote receiver, and any decorative lighting. Most installations require a dedicated circuit run to the fireplace location.
07
Permits & code compliance
We pull the gas piping permit (and any required mechanical or building permits) before work begins. Inspections are scheduled at the required milestones. All work meets WAC and local code.
08
Final testing & safety check
Pressure test on the gas line, leak detection on all connections, CO safety check, ignition verification, blower testing, and operational walkthrough. Unit isn't considered complete until everything passes.
09
Final walkthrough
We walk you through the unit's operation, remote, maintenance recommendations, and warranty registration. You receive documentation of the work and permits for your records.
Pricing Transparency
What Affects Gas Fireplace Installation Cost
Installation pricing varies significantly based on scope. Firm pricing comes after a site visit — too many variables to quote it blind. After a site visit, we provide a detailed written estimate with line items so you understand exactly what you're paying for.
Insert vs. built-in
An insert into an existing fireplace costs less than building one in.
Venting complexity
A short run through an exterior wall is simple. Vertical runs and roof penetrations are not.
Gas line work
A short run off nearby supply is quick. Through finished walls is not.
Finish carpentry
Tile, stone, mantel, trim. Built-ins usually need it.
Permits
We pull them and include them in the scope.
Unit selection
The fireplace itself is a big share of the budget.
Insert installations into existing masonry typically run at the lower end of the range; new built-in installations with significant finish carpentry sit at the upper end. We provide a firm written estimate after the site visit so you know the exact cost before any work begins.
Most Popular Project
Convert a Wood Fireplace to Gas
Wood-to-gas conversion is the most common installation project we handle for Seattle homeowners with existing masonry fireplaces. The wood-burning firebox you already have becomes the home for a gas insert — eliminating firewood storage, hauling, ash cleanup, and the creosote that drives annual chimney sweeps.
A complete wood-to-gas conversion includes the insert unit, a properly sized stainless steel chimney liner for the new gas appliance, a gas line run from your existing supply to the fireplace, and venting modifications to match the insert's specifications. We pull the required permits and schedule the inspections.
- ✓Existing fireplace conversions
- ✓Insert installation with matched liner
- ✓Gas line installation or extension
- ✓Venting updates and code compliance
- ✓Permits and final inspections
Project Type
Installation vs. Replacement vs. Conversion
Three different project types — all of which involve installing a gas fireplace — but with different starting points, different scope, and different cost.
New Installation
No Existing Fireplace
You don't currently have a fireplace and want to add one. The largest scope of the three — includes framing, venting, gas line, electrical, finish work, and the unit itself.
- •Most design flexibility
- •Longest timeline (3–5 days typical)
- •Highest scope of work
- •Best for modern linear units
Replacement
Existing Gas Fireplace Failed
Your existing gas fireplace has reached end-of-life and needs replacement. We remove the failed unit, update venting and gas line to current code, and install the new unit in the same location.
- •Faster than new installation
- •Existing framing preserved
- •Code updates may be required
- •2–3 days typical timeline
Conversion
Wood-to-Gas in Existing Fireplace
You have an existing wood-burning fireplace and want to convert it to gas. We install a gas insert into the existing firebox, add a stainless liner, run the gas line, and complete venting per code.
- •Lowest scope of the three
- •1–2 days typical timeline
- •Preserves existing aesthetic
- •Wood to gas conversion page →
Safety First
Why Professional Installation Matters
Gas fireplace installation isn't a DIY project. Washington state law requires licensed gas piping contractors for any work involving gas connections — and there are real safety, financial, and legal consequences to getting it wrong.
Gas leak risk
Wrong sealant or an undersized line leaks. Slow leaks are the dangerous kind.
Venting safety
Bad venting sends combustion gas into the house instead of out of it.
Carbon monoxide protection
CO is invisible and has no smell. The venting has to be verified.
Required permits
Washington requires them for gas piping work.
Manufacturer warranty
Most warranties are void without professional installation.
WA gas licensing
We hold the Washington State gas piping contractor license.
Gas Fireplace Installation Across Seattle & Puget Sound
Pacific Northwest climate makes gas fireplaces especially useful as supplemental heating — and Seattle's older housing stock creates specific installation considerations we see across every neighborhood.
Cold-season supplemental heat
October through April is when it earns its keep.
Pre-1960 Seattle masonry homes
Craftsmans, Tudors and bungalows across Ballard, Queen Anne and Beacon Hill.
Code compliance specific to King County
Gas piping, vent clearances and combustion air rules are local.
Regional expertise & manufacturer relationships
Napoleon, Heat & Glo, Heatilator and the rest of what's common here.
Gas Fireplace Installation FAQ
Questions Seattle homeowners ask before scheduling installation
Related Gas Fireplace Services
Wood to Gas Conversion
Convert existing wood-burning fireplace
Gas Fireplace Repair
Service for existing gas fireplaces
Gas Fireplace Tune-Up
Annual maintenance — $295 flat rate
Chimney Relining
Stainless liner for new gas inserts
Chimney Inspection
Inspect existing chimney before install
Gas Fireplace Services — Hub
Overview of all gas fireplace services
Schedule a Gas Fireplace Installation Consultation
Site assessment. Detailed written estimate. Licensed WA gas technicians. Permits pulled, code compliance verified, single-vendor coordination. Serving Seattle and the broader Puget Sound region.
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Last reviewed: May 2026