Gas Line Extension vs. New Line Cost Guide
Two scopes share one buyer question and price apart. Extending an existing line prices the added run from a line already in the house. A new line from the meter prices a full run from the supply point. The fireplace pages here publish both scopes as adders; the two frames price the standalone project.
Orange County, CA · Updated 2026 · Costs shown as ranges — your quote will vary by installer and scope
Two scopes, priced apart
| Scope | What the scope covers, as reported | Published line |
|---|---|---|
| Extension | added run from an existing line, venting hookup table | $250-$500 |
| New hookup | new run priced in the same table | $200-$1,000 |
| Extension | line extended to a fireplace, HomeGuide fireplace page | $250-$500 |
| New line, whole project | most projects, Angi frame | $260-$820 |
| New line, whole run | total on average, HomeGuide frame | $350-$2,000 |
The first three rows are component lines published inside fireplace projects, named with their sources; the last two are the frames' whole-project readings. An extension prices the added run only, from pipe already in place. A new line prices the full distance from the meter, plus any trenching a buried route carries. The line as one project prices on the gas line installation cost hub.
Per-foot readings for each scope, inside the frames
| Per-foot line | Frame and source | 2026 band |
|---|---|---|
| Any run, per linear foot | Angi frame | $15-$25 |
| Interior meter run, per linear foot | HomeGuide fireplace page factor table | $30-$40 |
| Meter-to-street run, per linear foot | HomeGuide fireplace page factor table | $12-$25 |
| Trenching, per linear foot | HomeGuide propane-tank page | $5-$12 |
The HomeGuide rows are that publisher's lines as published on its gas-fireplace and propane-tank pages, named as those pages' lines wherever used, and never averaged into the Angi row. Route decides which rows a quote carries: an interior extension names no trenching row, while a new buried line can carry it on top of its per-foot band. Permit fees sit apart, at $100 to $300 in the Angi frame.
The venting guide's lines are fireplace-only adders, differentiated head-on
The extension and new-hookup figures above come from the insert venting guide, and their context is the whole difference: that guide prices an insert hookup as an adder inside a fireplace insert project, beside the insert hub that prices the insert itself whole. Nothing in those lines prices an extension to a stove, a dryer, or an outdoor feature. This guide prices the two scopes as the project, for any end use; the run priced by end use sits on the gas line installation cost guide.
Permit context, as reported context only, for both scopes
Published reporting places both scopes in the same reported context: gas work sits in permit and licensed-professional territory as reported, and a quoted scope is carried as priced lines only: a pipe run line, a connection line, a pressure-test line, and a permit line where carried. No line here describes a procedure of any kind. That is reporting, not advice on whether a specific property needs a permit; those calls belong to the local building department.
- Scope named: extension or new line from the meter
- Frame named per line: Angi or HomeGuide
- Added-run length shown apart from meter distance
- Trenching and permit lines shown apart
- Fireplace adders never read as whole-project pricing
Frequently asked questions
What does extending a gas line cost, as reported?
Inside the venting project's hookup table, an extension is priced at $250 to $500; the HomeGuide gas-fireplace page prints the same band for extending a line to a fireplace. Both are component lines, named apart from whole-project frames.
What does a new gas line from the meter cost, as reported?
Angi frame: most projects at $260 to $820, average $540, $15 to $25 per foot. HomeGuide frame, named separate: $350 to $2,000 total on average, per its gas-fireplace and propane-tank pages, trenching at $5 to $12 per foot buried.
Why does an extension usually price under a new line, as reported?
As reported, the priced length differs: an extension prices the added run only, while a new line prices the full meter distance and can carry trenching lines. The scope, not a different per-foot band, drives the gap.
Are the venting guide's extension figures whole-project prices?
No, head-on: the $250 to $500 extension line and the $200 to $1,000 new-hookup line are adders inside a fireplace insert project, for a fireplace hookup only. This guide prices both scopes standalone, inside the two named frames.
Do both scopes carry a permit line, as reported?
Reported context only for both scopes: reporting places gas work in permit territory, and the Angi frame prices permit fees at $100 to $300 as their own band. Whether a specific property needs one is a call for the local building department.