How Often Should Windows Be Professionally Cleaned?

Clean windows are one of those things you don't notice until they're done — and then you wonder how you lived with dirty glass for so long. But how often is 'often enough'?

Residential recommendations

• Interior and exterior: 2-4 times per year
• Homes near construction: monthly until project completes
• Homes near the coast: every 2-3 months (salt spray)
• Homes with hard water sprinkler stains: every 2 months
• Allergy sufferers: every 2 months minimum

Commercial recommendations

• Retail storefronts: weekly or bi-weekly
• Office buildings: monthly or quarterly
• Restaurants: weekly (interior and exterior)
• Medical facilities: monthly minimum
• Multi-story buildings: quarterly (requires lift equipment)

Factors that increase frequency

Trees near windows (pollen, sap, bird droppings), proximity to busy roads (exhaust film), high humidity climates (mildew on frames), and homes with pets (nose prints and paw prints on glass doors).

Cost of professional window cleaning

Residential: $4-$8 per window pane (interior and exterior). Average home (20 windows): $120-$200 per visit. Commercial storefront: $3-$5 per window. Volume discounts apply for recurring service — most companies offer 10-20% off for quarterly contracts.