Roof Inspection Cost & What to Expect (Buying or Selling)

When you’re buying or selling a home in the San Juan Islands, the roof is one of the biggest question marks on the property — and one of the most expensive things to get wrong. A proper inspection turns that guesswork into a documented, dollar-figured picture of what you’re actually dealing with. Here’s what a roof inspection costs out here, what it covers, and how the written report protects your transaction.

In the San Juan Islands, our standard on-island roof inspection is free when you’re getting an estimate or weighing repairs. A detailed real-estate or pre-purchase report — the kind written to protect a transaction — is a flat fee up to about $450. Both come with a clear written summary, and both are estimates until we confirm your number.

How much does a roof inspection cost in the San Juan Islands?

Most roof inspections here cost you nothing. If you want an honest opinion on whether your roof needs a repair or a full replacement, our free on-island inspections and written estimates are exactly that — free, with a walkable surface check and a written breakdown you can keep.

The one paid version is the documented real-estate report. That’s a flat fee up to roughly $450 because it’s a different product: a formal condition report with photos, remaining-life assessment, and repair estimates that has to hold up when a buyer, seller, agent, or lender reads it. The price reflects the documentation, not a harder climb up the ladder.

A few honest notes on cost out here:

• The fee is flat, not hourly. You know the number before we schedule — no meter running.
• Ferry logistics don’t inflate the inspection. They do make actual roof work cost more on the islands (crew time, material staging, off-island disposal), which is one more reason to know the roof’s condition before you buy.
• It’s an estimate, not a quote. Roof size and how much documentation the deal needs move the figure. A quick call locks in your real number.

What does a roof inspection actually check?

A real inspection is far more than a glance from the driveway. When we’re on a roof in Friday Harbor, Eastsound, or Lopez Village, we work through every failure point that matters in this marine climate:

• The surface — asphalt shingles, standing-seam metal, or cedar shakes checked for wear, cracking, lifted or missing pieces, and granule loss. Near saltwater we look hard for corrosion on metal and fasteners, where marine-grade Kynar 500 / PVDF coatings and stainless fasteners earn their keep.
• Flashing — the metal at chimneys, walls, skylights, and dormers. Failed flashing, not failed shingles, is the most common source of leaks.
• Penetrations — plumbing vents, exhaust caps, and pipe boots that dry out and split.
• Valleys — where two roof planes meet and shed the heaviest water; a prime leak and debris-trap zone in our 40-inch-a-year rainfall.
• Gutters and downspouts — clogs, sagging, and drainage that dumps against the foundation. Ask about our gutters and flashing work if we find trouble here.
• The accessible deck and attic — from inside we look for active leaks, daylight, rot, staining, and the ventilation that keeps a roof from cooking or sweating.
• Moss and algae — heavy on shaded north slopes under the Douglas firs. We flag it early because you never pressure-wash shingles, and untreated moss shortens a roof’s life fast.

What kind of roof inspection do you need?

Not every situation calls for the paid report. Here’s how the options compare so you only pay for what your situation actually requires:

If the report surfaces problems, the fixes follow the same honest ranges we quote everywhere: most roof repairs run $450–$3,500, moss treatment and cleaning $400–$1,600, and a full replacement anywhere from $11,000 to $40,000+ depending on material. You’ll know which conversation you’re having before anyone signs.

Why does a roof inspection matter when buying or selling an island home?

For a real-estate transaction, the roof report is cheap insurance on a five- and six-figure decision. Here’s what it buys you:

1. A documented number instead of a guess. “The roof looks fine” is worthless in a negotiation. “12–15 years of remaining life, flashing repair recommended, ~$1,800” is leverage.
2. Protection for the deal. Buyers get honest disclosure and no post-closing shock. Sellers who inspect before listing control the story and head off last-minute renegotiation.
3. Reach across the whole archipelago. We inspect every island — San Juan, Orcas, Lopez, Shaw, and the outer islands like Waldron, Decatur, and Blakely — and schedule real-estate reports fast so a ferry timetable never stalls a closing.
4. Island-specific eyes. We know what salt air does to fasteners near the water, how west-side wind (about 20% stronger than Anacortes) works shingles loose, and how much moss the north slopes hide. A mainland inspector flying in doesn’t.

If the home has a metal roof — the best long-term island roof — we’ll tell you honestly how much life is left and whether it was built with the marine-grade coatings these conditions demand. If it’s due for replacement, our standing-seam metal roofing systems are what we’d put on our own homes out here.

How often should you inspect an island roof?

At least once a year, and again after any major windstorm. Our climate is hard on roofs: roughly 40 inches of rain a year with the heaviest volumes in November, stronger west-side wind than the mainland gets, and constant moss pressure on shaded slopes. An annual look catches lifted flashing, split pipe boots, clogged valleys, and early moss while they’re still cheap fixes.

Two habits stretch a roof’s life dramatically: treating moss before it takes hold — see our moss treatment and roof cleaning — and installing zinc or copper ridge strips that prevent regrowth in the first place. Skip both and you’re paying for a roof years sooner than you should.

Get your roof inspected before you sign

Whether you’re buying a place in Roche Harbor, selling in Deer Harbor, or just want to know how many winters your current roof has left, the honest answer starts with a look. Our estimate inspections are free, and a documented real-estate report is a flat fee up to about $450 — an estimate we’ll confirm before we schedule.

Call San Juan Roofing Co. at (360) 205-1462 or reach out through our contact page with your address and target date. We’re a licensed, bonded, and insured island contractor, and we’ll build the ferry run around your closing.