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House Washing · Northern VirginiaProfessional House Washing Services for Vinyl, Brick & Stucco Homes in Northern Virginia
Lawn Theory soft-washes siding, brick, stucco, and fiber-cement across Northern Virginia — low-pressure application with biodegradable detergents that remove algae, mildew, and pollen film without forcing water behind your siding or voiding your manufacturer's warranty.
The Short Answer
Professional house washing in Northern Virginia runs $299 for homes up to 1,500 sq ft, $449 for 1,500–2,500 sq ft, and $649 for homes over 2,500 sq ft. Siding gets a soft wash — low pressure plus biodegradable detergents that kill algae and mildew on vinyl, brick veneer, stucco, and fiber-cement — while hard flatwork like concrete and stone can safely take true pressure washing. Pressure high enough to strip grime off siding also forces water behind it and voids most manufacturer warranties, so a company quoting one machine for your whole exterior is the wrong company. Most jobs finish in a half day to a full day, and every quote is written, line-item, and delivered within 24–48 hours of the walkthrough.
What's Included
Transform Your Home's Exterior
Our professional house washing service removes years of dirt, grime, mold, and mildew from your home's exterior using safe, effective soft-wash methods that restore your home's beauty and protect your investment.
- Safe for all siding materials — vinyl, brick, stucco, and fiber-cement each get the correct pressure and chemistry.
- Eco-friendly cleaning solutions — biodegradable detergents that break down algae and mildew without harming landscaping.
- Licensed and insured professionals — every crew is trained on soft-wash technique and surface-specific chemistry.
- 100% satisfaction guarantee — if buildup remains after the visit, we come back and make it right.
Exterior Surfaces We Clean
Vinyl siding, brick and brick veneer, stucco, and fiber-cement (Hardie board) each respond differently to pressure and chemistry — vinyl can crack under too much heat and pressure, stucco is porous and traps detergent if not rinsed correctly, and brick veneer can trap moisture behind it if soft-wash dwell time isn't followed. We also clean soffits, fascia, trim, shutters, and window exteriors as part of a full house wash.
What drives your price and timeline: square footage and stories (more surface, more time), buildup severity (first-time cleans cost more than annual maintenance), surface type (each material gets its own chemistry and pressure), and access (pitch, landscaping, and tight lots add setup). Best seasons are spring, for a pollen reset, and fall, ahead of the holidays and after leaf drop.
How We Work
Our House Washing Process
Consultation
We walk your exterior, identify siding material, algae and mildew buildup, and any landscaping or access concerns before quoting.
Proposal
A written, line-item quote within 24–48 hours — surface-specific method, price tier, and scheduling options.
Soft Wash & Rinse
Low-pressure application of biodegradable detergent, correct dwell time, then a thorough low-pressure rinse — protecting plants and siding.
Local Knowledge
What Northern Virginia Homes Actually Deal With
- Humidity feeds algae and mildew fastNoVA's humid summers keep siding damp longer than drier climates, which is exactly what black algae (Gloeocapsa magma) and mildew need to take hold on north-facing brick and shaded vinyl.
- Spring pollen film builds up fastHeavy oak and pine pollen coats siding and trim every spring, staining lighter-colored vinyl and stucco within days if it isn't rinsed off before it bonds to the surface.
- North-facing brick grows algae year-roundBrick and brick veneer walls that face north stay shaded and damp most of the year, which is why we see the heaviest green-black algae streaking on the north and northeast sides of homes.
- HOA exterior-appearance rules are commonMany communities across Fairfax, Loudoun, and Prince William counties require homeowners to keep siding free of visible mold, mildew, and algae staining as part of community appearance standards — we can provide a wash date and photos if your HOA asks for proof of compliance.
Why Lawn Theory
Why Homeowners Choose Us For House Washing
Soft Wash, Not Pressure Blast
Low-pressure application with the correct detergent for your siding — never a machine set to "blast," which can crack vinyl and force water behind it.
Licensed & Insured
Every crew and every job is fully licensed and insured in Virginia, so you're covered from walkthrough to final rinse.
Eco-Friendly Solutions
Biodegradable detergents break down algae, mildew, and pollen film without damaging landscaping, mulch beds, or nearby lawn.
Satisfaction Guarantee
If buildup remains visible after your wash, we come back and address it — no extra charge, no hassle.
House Washing Across Northern Virginia
Soft-wash house washing across Arlington, Alexandria, Fairfax, Loudoun & Prince William counties. Pick a county to see where we work.
Get My Free EstimatePopular Areas in Fairfax County
Do not see your town? We likely serve it — just ask.
What Neighbors Say
Trusted on Homes Like Yours
“Our north-facing brick had black streaking we couldn't get rid of ourselves. The crew soft-washed it in under three hours and it looks like a different house. No overspray on the flower beds either.”
“They explained why they wouldn't pressure-wash our vinyl siding and I appreciated that honesty. The soft wash got rid of years of pollen film and mildew without a single cracked panel.”
“Written quote same day, on time for the appointment, and our HOA letter about algae staining is officially resolved. Would use again for our next cleaning.”
Questions
House Washing — Common Questions
What's the difference between soft washing and pressure washing?
Soft washing uses low water pressure combined with biodegradable detergents to kill algae, mildew, and mold on siding materials like vinyl, brick veneer, stucco, and fiber-cement. Pressure washing uses high-force water alone and belongs on hard flatwork like concrete and stone that can handle it. Pressure-blasting siding can force water behind panels, strip paint, and void your manufacturer's warranty — which is why we soft-wash your house and reserve pressure washing for driveways and walkways.
How much does professional house washing cost?
Pricing is based on home size: $299 for homes up to 1,500 sq ft, $449 for 1,500–2,500 sq ft, and $649 for homes over 2,500 sq ft. Larger packages add front porch, deck, and garage door cleaning. Every quote is written and line-item, delivered within 24–48 hours of your walkthrough, and the exact price depends on square footage, buildup severity, surface type, and site access.
How often should I have my house washed?
Most Northern Virginia homes benefit from a wash once or twice a year — spring is popular for resetting after heavy pollen season, and fall works well before the holidays and after leaf drop. Homes with heavy shade, north-facing brick, or nearby trees may need more frequent attention since they hold moisture longer and grow algae and mildew faster.
Is house washing safe for my landscaping and pets?
Yes. We use biodegradable detergents at low pressure and pre-wet or cover sensitive plants and mulch beds before applying any cleaning solution. The rinse step dilutes and washes away any residual detergent. We recommend keeping pets indoors during the service and until surfaces are fully rinsed and dry, simply as a precaution.
Will house washing satisfy my HOA's exterior-appearance requirements?
In most cases, yes. Many communities across Fairfax, Loudoun, and Prince William counties require siding to be kept free of visible mold, mildew, and algae staining as part of community appearance standards. We can provide the service date and before/after photos if your HOA requests documentation of compliance.
Why does my north-facing brick have more algae and mildew than the rest of the house?
North and northeast-facing walls get the least direct sun, so they stay damp longer after rain or high humidity — exactly the conditions black algae (Gloeocapsa magma) and mildew need to establish. Northern Virginia's humid summers make this especially common on shaded brick and vinyl, which is why these sides often need more frequent attention than sun-exposed walls.
Will house washing damage or discolor my siding?
Not when it's done correctly. We match pressure and chemistry to your specific siding material — vinyl, brick veneer, stucco, and fiber-cement all respond differently, and using the wrong combination can crack panels, trap moisture behind brick, or strip stucco texture. Our soft-wash approach is specifically designed to clean thoroughly without damaging the surface underneath.
Free Interactive Tool
House Wash Instant Quote
Tell us about your home for an instant soft-wash price range.
Ready When You Are
Get Your Free House Washing Estimate
Written, line-item quotes in 24–48 hours. No pressure, no generic ballparks.