Cost to Gas Line Installation in Seattle, WA

$256–$1,280 in Seattle

28% above the national average · 1.28x cost multiplier

In Seattle, a gas line installation runs $256 to $1,280 on average — about 28% above what homeowners pay nationwide. The West Coast market's labor costs account for most of the gap, with material pricing and local permitting fees adding to the spread. Use the cost table below to compare budget, mid-range, and premium options side by side.

Cost Breakdown in Seattle

Line Item	Low	Mid	High
Cost per linear ft	$19	$38	$90
Materials	$102	$256	$768
Labor	$230	$512	$1,536
Permits	$128	$192	$384
Total	$461+28% vs. national avg	$960+28% vs. national avg	$2,688+28% vs. national avg

Budget

Short run (10-15 ft) from existing supply to new appliance (dryer, stove, fireplace), accessible location, black iron pipe.

Mid-Range

25-35 foot run through wall or floor to new appliance, CSST flexible tubing, gas shutoff at appliance, tested and inspected.

Premium

60-100 foot run from meter or main supply, multiple drops for new appliances, outdoor gas line for grill or firepit, bonding and inspection.

Material Options

Material prices below are national averages; availability in Seattle may shift costs slightly.

Material	Cost/Unit	Pros	Cons	Best For
Black Iron Pipe (Schedule 40)	$1-$3 per linear ft materials	Approved everywhere, extremely durable, not affected by bonding requirements, inexpensive material	Rigid - requires precise measurement and threading, more labor-intensive to install around obstacles	Short exposed runs, appliance connections, and jurisdictions with CSST restrictionsApproved everywhere, extremely durable, not affected by bonding requirements, inexpensive material
CSST (Corrugated Stainless Steel Tubing)	$2-$5 per linear ft materials	Flexible, fast installation, fewer fittings needed, runs through walls easily, resistant to movement and vibration	Requires bonding to prevent lightning-induced arcing (required by code in most states), more expensive than black iron materials	New construction and remodeling work where long flexible runs are needed - now the most common residential methodFlexible, fast installation, fewer fittings needed, runs through walls easily, resistant to movement and vibration
Copper (Type K or L)	$3-$8 per linear ft materials	Approved in some jurisdictions, good for LP gas in some applications	Not approved for natural gas in many areas, not permitted underground in most codes, expensive	LP propane applications in specific jurisdictions - check local code before specifyingApproved in some jurisdictions, good for LP gas in some applications
PE Pipe (Underground Only)	$1-$3 per linear ft materials	Required for most underground residential gas runs, flexible, corrosion-resistant	Cannot be used above grade, requires mechanical fittings and transition fittings at building entry	Outdoor underground gas runs to outbuildings, outdoor kitchens, pool heaters, and generatorsRequired for most underground residential gas runs, flexible, corrosion-resistant

Other Projects in Seattle

Full Kitchen Remodel

Full Bathroom Remodel

Composite Deck Building

Back to national average for Gas Line Installation

Seattle Estimate

Typical Range

$256–$1,280

vs. National Average

28% above national

Cost Multiplier

1.28x

Cost Per linear ft

$19–$90

Estimates apply Seattle's 1.28x regional cost multiplier to national averages. Actual bids vary by contractor, project scope, and timing.

See national average costs →