How Much Does a Roof Replacement Cost in Federal Way, WA?

Two different published numbers for “roof replacement cost in Federal Way” disagree with each other, and neither one is wrong — they’re measuring different things. Here’s both numbers, where they come from, and which one actually applies to your roof.

The two numbers, and why they don’t match

Aggregator cost-guide sites (Homeyou, HomeAdvisor) publish a Federal Way-specific range of $8,000 to $25,000 for a full roof replacement on an average home. That range skews toward smaller, simpler jobs — a straightforward tear-off on a modest-size roof with no surprises.

Real contractor-published ranges for this region run higher: a regional roofing company’s own published quote data shows composite shingle replacement at $15,600 to $34,000, with metal and low-slope running higher still. Those numbers skew toward larger homes, full tear-offs, and jobs that found deck damage along the way — which, in a climate where moss traps moisture against the deck for years before symptoms show up inside the house, is common enough to move the average.

Neither source is lying. They’re describing different slices of the same market. The honest answer is that your actual price sits somewhere in that spread, and the only way to know where is an on-site inspection — which is why we give those for free rather than asking you to guess from a published range.

Price by material, per roofing square

A roofing square is 100 square feet. These per-square ranges include material and labor, reconciled between the two source types above for this specific market:

• Asphalt/composition shingle: $450–$750 per square
• Cedar shake: $800–$1,400 per square
• Flat/low-slope (TPO, EPDM): $550–$950 per square
• Metal (standing seam): $900–$1,800 per square

A typical single-story Federal Way home runs 18–28 squares, which is where the $8,000–$25,000 whole-job range for asphalt shingle comes from.

What actually moves your price inside the range

Four things push a quote toward the top of its range:

1. Tear-off. Nearly every full replacement needs it — $40–$100 per square on top of material and labor. It’s the only way to inspect and fix what’s under the old roofing, which matters specifically in this climate because moss and algae trap moisture against the deck for years before a leak ever shows up inside the house.
2. Deck repair. If the inspection finds rotten or delaminated sheathing — common on an older roof with a history of moss coverage — that’s priced separately, typically $75–$150 per sheet.
3. Pitch. A standard 4/12–7/12 roof uses the base labor rate; an 8/12-or-steeper roof adds roughly 25% for the extra safety equipment and slower staging.
4. Material grade. Algae-resistant shingle lines, premium-grade cedar, or a heavier-gauge metal panel all cost more upfront but are worth it specifically in a climate where moss and algae are the dominant failure driver.

Why some quotes come in lower

A bid that’s noticeably below the ranges above is usually one of three things: a recover-over-existing job instead of a full tear-off (which can’t find or fix deck damage), a lower material grade without algae resistance, or tear-off and deck repair simply left off the number to look cheaper. None of those are automatically wrong choices — but they’re a different scope of work than a full tear-off with a deck inspection, and comparing them side by side as if they’re the same job is how homeowners end up surprised mid-project.

What to budget

Plan on $450–$750 per square for asphalt shingle, more for cedar shake, flat, or metal, and expect tear-off and any deck repair to be separate line items on an honest quote from anyone you hire.