pressure-washing

How Much Does Pressure Washing Cost in Derry, NH? (2026) Prices for Siding, Decks, Driveways, and Roofs

Pressure washing prices in Derry, NH for 2026: house washing, driveways, decks, roof soft washing, seasonal timing, well and septic considerations, and hiring tips.

How Much Does Pressure Washing Cost in Derry, NH? (2026) Prices for Siding, Decks, Driveways, and Roofs

Pressure washing a typical two-story Colonial in Derry, NH costs $350 to $650 in 2026, and a full package that includes the house, driveway, walkways, and a deck usually lands between $700 and $1,200. Derry is a mix of 1980s and 1990s vinyl-sided subdivisions off Route 102 and Route 28, older homes near the Broadway downtown, and lakefront properties around Beaver Lake and Island Pond, and each of those brings a slightly different price.

Companies serving Derry come from within town and from Londonderry, Salem, Windham, and Manchester. Most charge by square footage of surface or a flat rate by home size, and a few still bill by the hour at $75 to $140. The green algae streaks on north-facing vinyl, the black mildew on shaded decks, and the moss on roofs facing the tree line are the three things that drive most calls.

Price by Surface in Derry

House washing, which for most Derry homes means vinyl siding, runs $0.15 to $0.30 per square foot of exterior wall. A 2,000 square foot two-story with roughly 2,400 square feet of siding costs $350 to $650. Ranches and split-levels, common in the neighborhoods off Chester Road and English Range Road, are cheaper at $250 to $450 because there is less wall and no second-story ladder work.

Driveways cost $0.20 to $0.40 per square foot. A two-car asphalt driveway of 600 to 800 square feet runs $150 to $300, and concrete runs slightly higher because it shows staining and takes more passes. Walkways and front steps are typically $50 to $150 as an add-on.

Wood deck cleaning runs $0.75 to $1.50 per square foot for a wash alone. A 300 square foot deck is $225 to $450. Adding brightener and a stain or seal coat pushes a deck project to $900 to $1,800, and many Derry homeowners bundle the two because the cleaned wood needs protection before winter.

Roof Cleaning and Soft Washing

Roof cleaning in Derry costs $450 to $900 for a typical asphalt shingle roof. This is always soft washing, meaning low pressure and a sodium hypochlorite mix that kills the moss and algae, because high pressure strips granules and voids shingle warranties. Homes backed up to conservation land or along the Rail Trail, where trees shade the roof most of the day, tend to need it every three to five years.

Soft washing is also standard for painted wood clapboard, older cedar shingles, and any siding with loose or brittle sections. It costs about the same as pressure washing per square foot but takes longer for the chemical to dwell.

Fences, Patios, and Extras

A wood or vinyl fence runs $2 to $5 per linear foot. Paver patios cost $0.30 to $0.60 per square foot, and resanding the joints afterward adds $1 to $2 per square foot. Gutter exterior cleaning, which removes the black tiger striping, runs $1 to $2 per linear foot and is one of the cheaper ways to make a house look freshly painted.

When to Schedule in Southern New Hampshire

Late April through June is the busy season in Derry, once the pollen drops and the ground firms up. Spring pricing is often 10% to 15% higher than fall because every company is booked. Waiting until September or early October usually gets a better rate and a faster appointment, and it still leaves time for a deck to dry before staining.

Winter washing is rare here. Water freezing on walkways and in equipment makes most companies stop by mid-November, and a few resume in March on warmer days. If you are prepping a house for a spring listing, book in the fall to avoid the April rush.

Humidity matters more than temperature for results. A house washed in a damp, still week in July will show green regrowth on the shaded side sooner than one washed on a breezy day in May.

What Pushes a Derry Quote Up or Down

Two-story and three-story homes cost more than single-story, and a walkout basement adds another level of wall on the back. Steep lots on the hills near Warner Hill Road or around Beaver Lake require more ladder setup and sometimes lifts, which adds $50 to $200.

Heavy buildup adds time. A house that has never been washed and has a decade of algae and mildew on the north side takes more chemical and more passes. Expect 20% to 40% above the base rate for a first cleaning, then a lower recurring rate.

Water source affects price too. Many Derry homes on the outskirts are on private wells, and a company that has to bring its own water because of a low-yield well or a homeowner's concern about the septic system will charge an extra $50 to $150. Homes on Pennichuck or town water do not have this issue.

Well Water and Septic Considerations

Runoff from soft washing contains diluted bleach, and in a home with a septic system the cleaning company should keep it out of the leach field and away from the well head. Reputable companies neutralize runoff and rinse plants and lawn thoroughly. Ask how they handle it before booking.

Low-yield wells are common in parts of town, and a house wash uses several hundred gallons. A company with a water tank on the truck avoids drawing your well down.

Lakefront Homes Around Beaver Lake

Homes on Beaver Lake, Island Pond, and the smaller ponds in town carry a few extra considerations. Runoff into the water is a concern, and a company working lakefront should be using biodegradable detergents and containing wash water where possible.

Access is often from the water side, and docks, retaining walls, and stone steps add surfaces to the quote. A lakefront package that includes the house, dock, and walkways typically runs $800 to $1,400.

Hiring a Pressure Washing Company in Derry

New Hampshire does not license pressure washing companies, so the checks fall on the homeowner. Ask for a certificate of general liability insurance and confirm it is active. A crew that blows a window seal, strips paint off a trim board, or forces water behind vinyl siding can cause a few thousand dollars in damage, and an uninsured company leaves you holding it.

Ask what pressure and chemicals they use on each surface. The right answer for vinyl siding is low pressure and a detergent mix.

The right answer for a roof is soft wash only. A company that says it uses the same high-pressure setting on everything is a company to skip.

Get the quote in writing with each surface listed separately, so you can drop the driveway or add the fence without renegotiating. You can compare local options through the pressure washing companies listed for New Hampshire on this directory, and the New Hampshire home services blog covers what other exterior work costs across the state.

Recurring Service Discounts

Several companies serving Derry offer an annual or every-other-year plan at 10% to 20% off the one-time rate. For a house that sits under trees or faces north, an annual wash at a discount usually costs less over five years than two heavy first-time cleanings.

Bundling with gutter cleaning in the fall is another common package, since the same crew and ladder setup handle both.

DIY vs. Hiring in Derry

A homeowner-grade electric pressure washer runs $150 to $300 and handles a driveway, walkway, or small deck fine. It will not do a good job on a two-story house without a ladder and a lot of time, and it cannot soft wash a roof. Rental gas units from the home centers in Derry and Salem cost $75 to $120 a day.

The risk with DIY on siding is water intrusion. Spraying upward at vinyl lap siding drives water behind the panels, where it sits against the sheathing. Professionals spray down and across, and they use detergents that do most of the work so pressure stays low.

For a driveway and a small deck, DIY makes sense. For the house and roof, the professional price is usually worth it.

Frequently Asked Questions

What is the average cost to pressure wash a house in Derry, NH?

A typical two-story vinyl-sided home costs $350 to $650 in 2026. Ranches and splits run $250 to $450, and larger Colonials with walkout basements can reach $800.

How much does roof cleaning cost in Derry?

Soft wash roof cleaning runs $450 to $900 for a standard asphalt shingle roof. Homes shaded by trees typically need it every three to five years.

Is fall cheaper than spring for pressure washing in New Hampshire?

Usually. September and October rates are often 10% to 15% below the April through June peak, and scheduling is easier.

Can pressure washing damage vinyl siding?

Yes, if done at high pressure or sprayed upward. Water forced behind the panels can lead to mold and rot in the sheathing. Low-pressure detergent washing avoids this.

Do I need to be home during the service?

Not usually, as long as outdoor water is on, windows are closed, and cars are moved off the driveway. Most companies serving Derry send a photo when the job is done.

How often should a Derry home be washed?

Every one to two years for most homes. Properties near Beaver Lake, under heavy tree cover, or with north-facing walls that stay damp often need it annually.