Straight answers on what exterior cleaning actually costs across Nassau and Suffolk County — no bait-and-switch, no vague ranges, no surprises.
One of the most common questions we get before any estimate is: "What does this actually cost?" It's a fair question — and most companies dodge it. You'll find vague national averages online that don't reflect Long Island pricing at all, or you'll get a contractor who won't give you a number until they're standing in your driveway trying to upsell you.
We're going to give you honest numbers. Actual ranges based on what we charge and what legitimate Long Island exterior cleaning companies charge in 2026. Use this as your reference to know whether a quote is fair — or whether someone is taking advantage of you.
One quick note: "pressure washing" and "power washing" are terms people use interchangeably, but not all surfaces should be pressure washed. For roofs and house siding, soft washing (low-pressure chemical application) is the correct method. We'll note this where relevant.
| Service | Typical Range | What Affects Price |
|---|---|---|
| House Washing | $250 – $450 | Square footage, stories, siding type, algae/mold level |
| Driveway Cleaning | $100 – $200 | Size (linear feet), staining, oil/rust spots |
| Roof Cleaning (Soft Wash) | $300 – $600 | Roof size, pitch, severity of algae/moss |
| Deck Cleaning | $150 – $300 | Deck size, wood type, staining needed |
| Paver Cleaning & Sealing | $200 – $500+ | Square footage, sealer type (wet look vs matte), condition |
| Soft Washing (Siding/Surfaces) | $200 – $400 | Surface area, growth level, accessibility |
| Concrete Washing (Walkways/Patios) | $75 – $175 | Area size, staining, access |
| Window Cleaning | $100 – $250 | Number of windows, stories, screen cleaning included |
These are Long Island market rates for licensed, insured professional companies in 2026. Prices may vary based on specific property characteristics.
A full house wash on a standard Long Island colonial or Cape Cod (1,500-2,500 sq ft) typically runs $250-$350. Larger homes in the 2,500-4,000 sq ft range fall in the $350-$450 bracket. Larger estates or homes with complex rooflines and multiple gables may exceed $500.
The correct method for house washing is soft washing, not pressure washing. High-pressure on vinyl or aluminum siding can force water behind the siding into the wall cavity, creating a moisture and mold problem inside your walls. Soft washing uses biodegradable detergent to kill algae, mildew, and oxidation, rinsed at low pressure that won't penetrate your exterior envelope.
Factors that push house washing toward the higher end of the range:
A standard two-car concrete driveway (approximately 600-800 sq ft) runs $100-$150. Longer driveways or those with heavy oil staining, rust, or tire marks can reach $175-$200+. Oil stains that have penetrated the concrete may require a degreaser pre-treatment that adds to the cost.
Concrete is one surface where high-pressure washing is entirely appropriate — concrete is designed to handle it and benefits from the mechanical force of pressurized water removing embedded grime and biological growth.
Roof cleaning requires soft washing — not pressure washing. (See our separate guide on why pressure washing destroys shingle roofs.) Soft wash roof cleaning on a typical Long Island ranch or colonial runs $300-$450. Larger two-story homes with higher square footage and steeper pitch fall in the $450-$600 range.
Roof cleaning price is driven by: roof size (total square footage), roof pitch (steeper = more safety equipment and time), severity of algae and moss growth, and accessibility factors. Heavy moss or lichen infestations may require a second application and additional dwell time.
The ROI on roof cleaning is substantial. A professional soft wash extending your roof's lifespan by even 3-5 years saves you $4,500-$7,500 compared to early roof replacement — at a fraction of that cost.
A standard 200-300 sq ft deck runs $150-$200. Larger decks (400+ sq ft) or those with railings, built-in benches, or pergola structures fall in the $225-$300 range. Fence cleaning is often bundled with deck cleaning for a combined discount.
If your deck needs staining or sealing after cleaning (which is often the case for weathered wood decks on Long Island), that's typically priced separately as a preparation + stain/seal service.
Paver cleaning and sealing is priced primarily by square footage. A standard two-car paver driveway (600-800 sq ft) with cleaning, polymeric sand replacement, and sealing typically runs $400-$600 complete. Patio-only sealing for 200-400 sq ft falls in the $200-$350 range.
Sealer choice affects cost — wet-look acrylic sealers are generally priced similarly to matte/natural sealers, but penetrating sealers and high-end polyurethane options cost more due to material cost. The type of sealer is something to discuss with your contractor based on your specific goals and the paver material.
Homes with paver repair needs (sunken areas, cracked pavers, complete polymeric sand failure) will have additional costs beyond cleaning and sealing.
If you've seen national cost estimates online — $150 for a house wash, $80 for a driveway — those numbers are not Long Island. Here's why our market runs higher:
If someone is offering you a house wash for $100 or a full paver seal for $150, they're either cutting corners on materials, carrying no insurance (which is your liability if they're injured on your property), or they're using fly-by-night practices that will damage your surfaces.
The best quotes come from a physical walk-around or at minimum photos plus measurements. Here's what to have ready when you contact us or any contractor:
At Best Power Wash LI, we provide free estimates with no obligation. We'll look at your property, tell you exactly what's needed, and give you a written price before any work begins. No surprises on the invoice.
The biggest opportunity for Long Island homeowners to save money is bundling multiple services into one visit. When a crew is already mobilized, driving to your property, and set up on site, the incremental cost of adding a second or third service is significantly less than scheduling separate visits. Typical examples:
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