Big L Windows & Doors

Precision Door services over 5000 Buffalo customers every year and has been providing service since 2001. We have a highly trained team of technicians and installers which work out of a real building and warehouse. Don't be fooled by uninsured, fly by night outfits using inferior products that give you a tail-light warranty. You should demand to see a warranty in print and every company's workers comp insurance that steps on your property.

Since 1962, Wonder Windows has grown to become one of the leading and most trusted professional window installers in WNY. We are a second generation family owned business, that has been committed to offering the highest quality products at the lowest prices available. Our professional installation teams are our own employees and have been with us for years. It excites us that 60% of our business is repeat customers or referrals!