Residential House Washing
transform your home’s exterior with professional house washing from NW Pressure Washing Service. We safely remove years of moss, mildew, algae, and dirt from your Portland-area home, restoring its beauty and protecting your investment.
Why Portland Homes Need House Washing
Organic Growth
Shaded north-facing walls and areas under tree cover develop thick moss buildup that holds moisture against siding, accelerating rot and deterioration. These black and green stains on Portland home exteriors aren't just dirt—they're living organisms that feed on your siding material, causing permanent damage if left untreated.
Dirt and Pollen
Portland's lush vegetation means heavy pollen in spring and constant organic debris year-round, creating a grimy film on home exteriors. This accumulation isn't just unsightly—it traps moisture against your siding and provides a food source for mold, mildew, and algae growth. Professional house washing safely removes years of accumulated grime, caused by organic buildup.
Spider Webs & Insects
Our mild climate supports insect populations that leave nests, webs, and staining on siding and trim. These organic materials not only create an unsightly appearance but also attract more pests and hold moisture against your home's exterior, accelerating deterioration.
Rain Streaking
Rainwater carries dirt and minerals down your siding, creating unsightly streaks that become harder to remove over time. Regular house washing—typically annually for most Portland homes—prevents these issues from causing permanent damage. Homes with heavy tree cover or north-facing exposure often benefit from bi-annual house washing to stay ahead of aggressive moss and algae growth.
Why Portand is Prime for House Washing
Portland has many factors leading to why homes in Portland & Metro are need consistent house washing.
Days of Rain per Year In Portland
Of Portland under Tree Coverage
Trees in Portland dropping leave and needles year round on homes.
of your paint's lifespan can be lost due to dirty siding.
Soft Wash Pressure Washing
All of our house wash services is a soft wash pressure washing
Our soft wash residential pressure washing process begins by pre-wetting your home's exterior and surrounding landscaping with clean water. We then apply a carefully measured cleaning solution that combines surfactants (professional-grade soaps) with sodium hypochlorite (bleach) at safe, controlled concentrations. This powerful yet safe mixture is what makes soft washing so effective at killing mold, mildew, and algae at their source.
We allow the cleaning solution to dwell on your home's exterior for 10-15 minutes, giving it time to penetrate deep into porous surfaces, break down organic growth, and lift years of accumulated dirt and grime. During this dwell time, the surfactants work to surround and suspend dirt particles, while the sodium hypochlorite kills mold and mildew spores, destroys algae, and eliminates the organisms that cause those unsightly black streaks and green stains common on Portland homes.
After the solution has had adequate time to work, we thoroughly rinse your home's exterior with low-pressure water, revealing a clean, sanitized surface that looks revitalized. The result is thorough cleaning that kills spores and organisms at their root, preventing regrowth for months longer than conventional residential pressure washing methods.
We take special care to protect the plants and landscaping around your home during the soft wash process. Before applying any cleaning solutions, we pre-wet all vegetation, bushes, flowers, and grass surrounding your home's foundation. This saturation creates a protective barrier that prevents cleaning solutions from being absorbed by plant roots. For particularly delicate plants or areas with dense landscaping directly adjacent to your home, we use protective coverings to shield vegetation during application. After completing the soft wash and final rinse, we perform a thorough post-rinse of all landscaping to ensure no cleaning solution residue remains. Our careful attention to your landscaping means you get a beautifully clean home without any damage to your garden, shrubs, or lawn.
This professional approach to plant protection is one of the key differences between our expert soft wash residential pressure washing service and DIY attempts, where homeowners often inadvertently damage expensive landscaping by not taking proper precautions with cleaning solutions.
Residential Applications:
- House siding (all types)
- Building exteriors
- Stucco and EIFS
- Brick and stone
- Vinyl siding
- Wood siding
- Fiber cement (Hardie board, etc.)
- Aluminum siding
- Painted surfaces
- Trim and fascia
- Soffits and eaves
- Exterior windows (as part of house wash)
Preserves Siding: Low pressure doesn't damage surfaces
No Water Intrusion: Gentle pressure won't force water behind siding
Longer-Lasting Results: Chemistry kills growth at the root, preventing quick regrowth
Safer for All Materials: Works on vinyl, wood, stucco, brick, fiber cement, and more
Cleans Better: Solution reaches into textured surfaces where pressure alone can't
Protects Your Investment: Preserves siding integrity and extends its life
More Thorough: Kills organisms rather than just blasting them away
Transparent House Washing Pricing
House washing costs in Portland typically range from $300-$1000 depending on home size, siding condition, and accessibility. We provide free, no-obligation estimates that clearly explain what’s included.
Factors affecting house washing price:
Home square footage and number of stories Siding type and current condition Amount of biological growth (heavy moss requires extra treatment) Landscaping proximity and protection required Additional surfaces (garage, shed, deck)
How Often Should You Wash Your House?
Annual house washing is ideal for most Portland homes to prevent damage and maintain appearance. Bi-annual house washing is recommended for: Homes with heavy tree cover North-facing or heavily shaded homes Properties near highways or industrial areas Light-colored siding that shows dirt readily
Residential Pressure Washing
House Wash Pricing
Get Up To 50% Off On Routine House Washing
Ready to restore your home's beauty and protect your investment? Call us today for a free, no-obligation estimate. Or fill out the estimate form
Get your free house washing estimate
