Brazoria County · Houston metro
Concrete Patio Cleaning Cost in Friendswood, TX
Local pricing and Gulf Coast cleaning advice for Friendswood, Brazoria County.
Friendswood is a settled Brazoria County suburb where tree-shaded streets and well-kept backyards set the tone. Brick patios, covered porches, and outdoor kitchens get plenty of use here, and the mix of older established homes and newer subdivisions means a lot of concrete spread across town, all fighting the same losing battle against Gulf Coast moisture.
The trouble in this part of Texas is rarely dirt. It's living growth. Damp air that hangs around the bayous feeds black mildew and green algae, and slabs shaded by trees or patio furniture turn slick and dark before owners notice. Because the humidity here barely lets up between seasons, that growth keeps coming back rather than clearing on its own. Leaf tannins from heavy canopy and rust from metal chairs add their own stains on top of it.
Plenty of folks who drive over to League City, Alvin, or Pearland for errands deal with the exact same patio headaches. The practical fix is cleaning paired with a sealer, since a bare wash lets the algae creep back within months. When you ask us for a quote, your details go to a single vetted local cleaner here, never sold to five companies all calling at dinnertime.
Cost estimator
Estimate your Friendswood patio cleaning cost
Estimated range
$150 – $208
For 300 sq ft in Friendswood. A real quote from a vetted local pro is free.
Why patios in Friendswood get dirty fast
The Gulf Coast humidity problem
In Friendswood, the patio problem is organic, not just dirt. Near-constant Gulf humidity across Brazoria County grows mildew, algae and mold on concrete, darkening the shaded sections first and holding on because the surface stays damp.
Since the moisture never really clears, regrowth is constant, and leaf tannin plus rust from metal furniture only add to it. Pressure washing alone gives way to returning algae within months here, so pros pair cleaning with a seal — as they do over in Alvin.
Clean, then seal
Make the clean last in Friendswood
A bare wash looks great for a few weeks, but in this humidity the algae creeps back fast. Adding a seal after cleaning slows regrowth and keeps the slab brighter for far longer. You can add sealing to your estimate above to see how it changes the range.
Common questions
Patio cleaning in Friendswood, TX
What does it cost to clean a concrete patio in Friendswood?+
Most Friendswood patio cleanings land between $150 and $400, driven mostly by square footage and how heavy the algae or mildew buildup is. A standard 300-square-foot slab usually falls near the lower-to-middle of that range. Adding a sealer afterward raises the total but pays off by holding regrowth back far longer than a bare wash.
When is the best time of year to clean a patio given Friendswood's humidity?+
Because moisture stays high here almost year-round, there's no perfect season, only better windows. Late fall through early spring tends to be ideal, since cooler, slightly drier stretches let a fresh seal cure properly. That said, if your slab is already black with mildew, waiting only lets it spread, so book whenever the growth shows.
Should I pressure wash it myself or hire a pro in Friendswood?+
DIY pressure washing can knock surface grime off, but rented machines run high enough to etch concrete and leave streaks if you're not careful. More importantly, plain washing skips the treatment that kills algae at the root, so it returns within months. A local pro applies the right cleaner and can seal afterward, which is what actually lasts here.
How often do Friendswood patios need cleaning?+
In this climate, plan on a yearly cleaning at minimum, and twice a year for slabs that sit under trees or stay shaded most of the day. The constant humidity means algae never really stops growing, so shaded, north-facing, or downspout-adjacent areas green up faster than open sunny patios that dry out quickly.
Why does my Friendswood patio turn black under the furniture?+
Those dark patches are mildew and mold thriving where it stays damp and shaded. Furniture legs and cushions trap moisture against the concrete and block sunlight, creating ideal conditions for growth. Metal furniture can add rust streaks too. Moving pieces occasionally helps, but a proper cleaning and seal is the real fix for recurring black spots.
Also serving nearby