A homeowner on a pressure washing forum asked how often a relative’s house in Houston really needs washing. If a company has just offered you a yearly plan, here’s how to check the deal.

What plans actually offer

These four operators publish their plan terms. We picked them because each one shows a different setup.

Provider (area) Fee House wash discount Terms worth reading
Wash Masters (area not stated) $24 a year, auto-renews 10% at once a year, 15% at twice Cancel 15+ days before the payment, by phone or signed form; quit and lose discounts for 2 years; prices fixed for the calendar year, then may rise
Super Clean Windows (area not stated) $49 a year, auto-renews 15% at twice a year (no yearly option) $75 fee to cancel a visit with under 72 hours’ notice; 30 days’ notice of price changes; quit and lose discounts for 2 years
Perfect Power Wash (several Eastern and Midwest states) No enrollment fee Same rate each year Tell them by March 16 if anything changes; cancel later and pay a 25% fee
Sonlight Services (Colorado Front Range) None listed 10% on annual plans Visit auto-scheduled at the same time each year

Two of these plans give deeper discounts, up to 30%, for monthly or quarterly visits. A national chain also advertises “up to 20%” off annual plans that mix pressure washing with window and gutter cleaning.

The per-visit math

Take a real price: one Portland-area company lists $385 for a one-story home of 1,500 to 2,000 sq ft. Our house washing cost guide has more published prices if your house is bigger.

  • 10% off, no fee: you save $38.50 a year.
  • 10% off with a $24 fee: you save $14.50 a year.
  • Twice a year at 15% off, plus a $49 fee: you pay $703.50 a year. That’s more than the $385 one wash would cost you, and $511 more than washing every other year, which averages $192.50 a year.
  • A 25% late-cancel fee on a $385 wash is $96.25.

So the plan saves real money only if you’d have booked the same number of washes without it. A plan that pushes you from one wash to two doesn’t save anything. It doubles the bill.

Price locks cut both ways. One plan promises the same rate each year. Another fixes prices only for the calendar year and says they may rise after that.

How often a house really needs washing

This is the question that decides everything, and the answer depends on your siding, shade and climate.

A vinyl siding maker recommends cleaning once a year. It says mildew grows on the dirt layer, “especially in warmer climates with consistently high humidity,” and is usually found under eaves and porch enclosures, where rain doesn’t reach.

Houston fits that description. NOAA’s 1991–2020 normals for Houston’s main airport show about 51.8 inches of rain a year, falling on about 104 days. Washers answering the Houston question on the forum said every two years, or every one to three years depending on shade, trees and how long the walls stay damp.

Drier places can go longer. One Colorado washer says algae typically comes back in 12 to 18 months there, faster on shaded north walls. A Maryland soft washer goes further and says most of its clients don’t need a yearly wash. It backs that with a two-year clean-home guarantee.

Notice the conflict: a company selling a yearly plan has a reason to say “yearly.” Before you sign, look at your own north wall and eaves about a year after a wash. If they’re still clean, you may only need a wash every other year. Our Louisiana heat and humidity guide explains why Gulf Coast siding grows green and black so quickly.

Read these terms before you sign

This isn’t legal advice, but the FTC’s consumer guidance boils down to a few checks:

  1. Does it auto-renew? Two of the four plans above renew the fee on your anniversary date. Note that date in your calendar.
  2. How do you cancel? One plan wants cancellation at least 15 days before the payment, by phone or signed form. The FTC says businesses have to give you a simple way to cancel paid subscriptions with automatic billing.
  3. What does quitting cost? Watch for late-cancel fees and rules that lock you out of discounts for two years.
  4. Can the price change? Look for an annual increase clause and how much notice you get.

The law here is in flux. A federal appeals court threw out the FTC’s 2024 “click-to-cancel” rule in July 2025, so don’t count on it. Other federal and state laws still apply, though. California, for example, requires businesses to show auto-renewal terms clearly before you agree and to get your consent before charging you. If a company keeps charging after you’ve cancelled, the FTC says to dispute the charge with your card company and report it at ReportFraud.ftc.gov. Your state attorney general’s consumer office can tell you which rules apply where you live.

For the questions to ask any company on the phone, see our house washing company interview script. If you’d rather skip plans entirely and do the in-between touch-ups yourself, our DIY soft wash guide covers the safe setup. For how we check every number, see our methodology.

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