How Often Should You Clean Your Windows in Southern California?
Most homes in the San Fernando Valley and greater Los Angeles area benefit from professional window cleaning every 2-3 months, though the right interval depends on your location, landscaping, and water source.
Why Southern California windows get dirty faster than you'd expect
- Dust and Santa Ana winds: Dry seasonal winds carry fine dust that settles on glass and screens.
- Hard water: Sprinkler overspray and hard water sources leave mineral spotting that builds up over time if untreated.
- Hillside and canyon homes: Properties near hillsides, canyons, or unpaved areas (common in Calabasas, Hidden Hills, and Woodland Hills) tend to accumulate dust and debris faster.
- Proximity to construction or traffic: Homes near active construction or busier roads see faster buildup of grime.
General guidelines
As a baseline: every 8-12 weeks for most single-family homes, every 4-6 weeks for storefronts and commercial properties with high foot traffic or street-facing glass, and immediately after any wildfire event if ash or fire retardant residue is visible on the exterior.
Signs it's time sooner than scheduled
- Visible haze or spotting from more than a few feet away
- Screens noticeably dulling natural light indoors
- Water spots that don't wipe off with a cloth (a sign of mineral buildup, not just dust)