Forty thousand dollars. That was the first bid my neighbor Dana got for her 1,700 square foot ranch house in Shoreline, and she laughed out loud in the guy’s face. Then she called three more companies and stopped laughing, because two of them came in close to that number. Here’s what nobody told her in that first meeting: the price of a roof in this corner of the country has almost nothing to do with the size of your house and almost everything to do with water.
I’ll walk you through where the money actually goes, which line items are negotiable and which ones aren’t, and how to sanity check a proposal before you sign. If you just want the shortcut, start with a documented average cost to replace a roof in your specific city, then use this guide to interrogate it.
Why the Rain Decides Your Price Before You Do
Everyone quotes the same national ranges for shingle, metal, and tile. Those ranges assume an average American climate, and an average American climate does not dump thirty plus inches of rain on a house between October and March.
Wet climates change three things at once. First, they demand better underlayment, and a decent synthetic membrane costs real money per square compared to the old felt paper. Second, they make ventilation and mold prevention non optional, which means added intake vents, ridge vents, and sometimes a full sheathing inspection once the old layers come off. Third, they shorten the working calendar. Crews lose days to wind and rain, and lost days get built into the bid.
Then there’s moss. If you’ve lived here more than two winters, you’ve seen it. Moss holds moisture against the shingle, lifts edges, and can quietly rot the deck beneath. A roofer who inspects your attic and flashing before quoting is worth more than one who eyeballs the roof from the driveway and emails a number the same afternoon. The National Weather Service keeps the regional precipitation records if you want to see how hard your microclimate gets hit.
The Five Number Method for Reading a Roofing Bid
Bids are written to be skimmed, so I built myself a little filter. I call it the Five Number Method, and it takes about four minutes. You don’t need a construction background. You need to find five figures on the page and check whether they exist at all.
- Tear off, in layers. A single layer of old shingles is one number. Two or three layers is a totally different job, and some companies won’t tear off at all. If you don’t see a layer count, ask.
- Sheathing replacement, per sheet. Good bids price this as a unit rate you approve as they go, not a mystery lump sum. Sheathing is plywood or OSB under the shingles, and rotted sections have to come out.
- Squares of material, not square footage of your house. A roofing square is 100 square feet of roof surface. Slope and complexity mean your roof surface is always bigger than your floor plan.
- The three digits after the dollar sign. Ask flat out: is this final? Nothing sours a project faster than a surprise change order in week two.
- Warranty length, split into two numbers. Manufacturer coverage on the material and workmanship coverage on the installation are not the same thing, and workmanship is the one that protects you.
See all five on one page and you’re probably talking to a professional. See two or three and you’re talking to a salesperson.
What You Can Actually Cut, and What You Really Can’t
I’ll take a stance here. If you’re trying to trim the number, cut the material tier before you cut the underlayment, and cut the underlayment before you cut ventilation. Upgrading to a premium designer shingle is a looks and lifespan decision, and a mid range architectural shingle performs fine in this climate. Skimping on the layers beneath it is how you end up paying twice.
Labor is the other big lever. Crews are the largest line item on nearly every bid, and installers have to follow fall protection rules on every steep pitch, which is a cost that’s baked in whether you like it or not. If you want context on why labor runs what it runs, the Bureau of Labor Statistics publishes wage data for roofing installers by region, and it explains a lot about why two bids twenty miles apart can differ by thousands.
What you should never cut: permits. An unpermitted tear off can haunt a home sale years later, and inspectors in most Puget Sound cities want to see the deck before it’s covered.
Timing It Around the Rainy Season
Here’s my Rainy Season Timing Rule, and it’s saved me a headache twice. Book your install for late spring or early summer, when the forecast gives you a stretch of dry days long enough to tear off, inspect, and dry in. If you can’t wait that long, ask the company how they handle water intrusion overnight.
A real scenario: a homeowner in West Seattle had a crew start a tear off in early November. A storm rolled through on day two. The crew tarped what they could, but the deck sat wet for three days and part of the ceiling below had to be repaired. That’s an expensive lesson in calendar management, and it had nothing to do with the shingle brand.
You can also stack the deck in your favor on the money side. Off season scheduling sometimes gets you a better labor rate, and bundling gutters, gutter guards, or attic insulation into the same project usually costs less than doing them separately later. Paying in cash upfront is a bad idea. A deposit is normal. Half the project before a single shingle lands is not.
Your Pre Signature Checklist
- License and registration number verified with your state’s contractor board
- Proof of insurance, both general liability and workers’ compensation
- Tear off and disposal listed as separate line items
- Sheathing priced as a per sheet unit rate
- Ice and water shield at valleys, eaves, and penetrations called out by name
- Written start date and a realistic completion window
- Payment schedule tied to milestones, not calendar dates
- Lien waivers from any subcontractors or material suppliers
One more thing worth checking, especially if you’re going back and forth between a repair and a full replacement. Ask the contractor to show you the condition of the flashing and the deck. If the deck is sound and the leak is one isolated valley, repair wins. If the shingles are curling, granule loss is heavy, or the roof is past twenty years, replacement wins, and OSHA safety standards are a big reason a rushed patch job on a steep roof isn’t the bargain it looks like.
Frequently Asked, Briefly
Does the cheapest bid ever win?
Sometimes, if it’s the cheapest bid from the most thorough inspector. Compare the scope, not the total. A bid that’s low because it skips underlayment upgrades isn’t lower, it’s incomplete.
How long does a tear off actually take?
Most single family homes take a few days to a week or more, weather permitting, and complexity matters more than square footage alone.
Is a metal roof worth the premium here?
For a lot of homeowners in this climate, yes, particularly if you plan to stay put through multiple shingle lifecycles. Standing seam handles heavy rain and shedding well, and it doesn’t grow moss the way asphalt does.
Get Three Bids, Then Get One More
Three is the standard advice, and it’s good advice, but the fourth bid from a company that actually climbs onto your roof and photographs the problem is often the one that tells you the truth about your own house. Dana ended up hiring the fourth company for closer to half her first quote, and the difference wasn’t a discount. It was a contractor who found that part of the “roof replacement” was really a leaking pipe boot and a bad valley.
So before you write a check, ask yourself one question: does this bid describe my roof, or a generic roof? If you can’t tell, you already have your answer.
