Attic Mold Removal in Hansville, WA

Signs to look for

• Gray or black mottling across the plywood or boards overhead
• Stains concentrated on the side of the house that faces the water
• Rusted roofing nails or wet spots on the insulation below them
• Damp, flattened insulation along the eaves
• A musty smell in upstairs rooms after a run of storms

Local conditions in Hansville

Hansville sits at the northern tip of the Kitsap Peninsula, about 16 miles northeast of Poulsbo and 23 miles from Seattle, with Hood Canal to the west, Admiralty Inlet to the northeast and Puget Sound to the east at Point No Point, home of the oldest lighthouse on the Sound. Kitsap County's sea level rise assessment found the Hansville and Point No Point shoreline had the highest modeled wave run-up of the sites it studied. For attics, the takeaway is exposure: homes near Foulweather Bluff and the beaches catch storm winds that push rain under shingles, up past ridge vents and into gaps around chimneys and skylights.

Exposure isn't the only issue. Many coastal homes are closed up tight through a long, damp winter, and indoor humidity finds its way into the attic through ceiling gaps and fan ducts that stop short of the roof. If the house is used seasonally, the attic may sit for weeks with no heat below and no one checking it, which gives condensation and small leaks time to do damage before anyone notices.

What affects the cost

Angi's Seattle cost guide shows attic mold removal at $825 to $3,300. HomeGuide's 2026 national ranges reach $1,500 to $6,000 for part of an attic and $6,000 to $15,000 for a whole one. Size, access, insulation removal, cleaning method and any flashing, duct, vent or sheathing work make up most of the difference, and a remote location can add travel time. Post-storm repairs and structural work in unincorporated Kitsap County are permitted through the Kitsap County Department of Community Development.

What happens when you call

The number on this page connects you with an independent local mold remediation company; this site does not do inspections or removal. Expect questions about the stains, any storm damage and how the house is heated and ventilated. A good assessment separates leak damage from condensation and puts the scope in writing. Washington has no state mold license or certification, so check that the company is registered with Washington L&I as a construction contractor on L&I's Verify a Contractor tool.