Pressure Washing Cost in Seattle, WA

Pressure washing in Seattle costs more than the national average, reflecting the higher cost of living and labor rates in the metro area. Experienced contractors in Seattle typically charge a premium due to demand and operating expenses. A full house exterior wash generally runs between $240 and $600 in 2026.

Here is a breakdown of average 2026 prices for common pressure washing services in Seattle:

Prices vary based on the size of the surface, its condition, accessibility, and the specific contractor. Use our free calculator above for a personalized estimate tailored to your property.

Seattle's marine climate with frequent rainfall creates ideal conditions for moss, algae, and lichen growth. persistent moisture is the primary driver for pressure washing as moss, algae, and lichen colonize wood decks, fences, and roof shingles year-round in the Pacific Northwest The Pacific Northwest is one of the highest-demand regions for pressure washing in the country, and most Seattle homeowners view it as essential annual maintenance.

The higher cost of living in Seattle directly affects labor rates, which are the single largest component of pressure washing costs (typically around 60% of the total). Contractors in the metro area face higher insurance premiums, fuel costs, and equipment expenses that get passed on to homeowners. That said, the competitive market still rewards shopping around — quotes can vary by 30% or more between contractors.

The most commonly pressure-washed surfaces in Seattle include wood siding, composite decking, concrete driveways, moss-covered roofs. Each material responds differently to pressure washing — for example, wood siding requires different PSI settings than brick walkways. A knowledgeable local contractor will adjust their approach based on the material, its age, and current condition.

The Pacific Northwest window for pressure washing is narrower than most regions. Late spring through early fall (May–September) offers the most reliable dry weather in Seattle, making it the prime scheduling window.

Most Seattle homeowners book their annual pressure wash in June or July after the spring rains have largely subsided. Waiting until late summer means dealing with peak contractor demand and potentially longer wait times for appointments.

One approach unique to this region: schedule a moss treatment in late winter (February–March) for roofs and decks, then follow up with pressure washing in late spring after the treatment has had time to kill moss root systems.

Seattle homes and properties feature a mix of materials shaped by the region's architecture and climate. Here are the surfaces our calculator covers most often in the Seattle metro area:

Wood Siding in Seattle's damp climate are prone to moss, algae, and even lichen growth. Annual pressure washing at lower PSI (1,200–1,800) followed by a wood brightener and sealer extends the life of outdoor wood structures significantly.

Composite decking is increasingly popular in Seattle. While marketed as low-maintenance, it still benefits from annual pressure washing at low PSI (1,200–1,500) to remove mold, pollen, and general grime that accumulates on the textured surface.

Concrete driveways are the most commonly pressure-washed surface in Seattle. Regular cleaning every 1–2 years prevents staining from becoming permanent and extends the life of the concrete.

Moss-covered Roofs in Seattle benefit from periodic pressure washing to maintain their appearance and structural integrity. A professional contractor will adjust pressure and cleaning solutions based on the material and level of soiling.

Wooden Fences in Seattle's damp climate are prone to moss, algae, and even lichen growth. Annual pressure washing at lower PSI (1,200–1,800) followed by a wood brightener and sealer extends the life of outdoor wood structures significantly.