9 Brothers Building Supply your source for quality Brentwood pergolas from Cambridge and Nicolock. Complete your dream outdoor living space with an elegant looking pergola. Whether a large pergola to cover your patio or a smaller one to give some style and shade over your outdoor kitchen. We also carry accessories like banners to add even more style to your pergola. Stop in at one of our locations today in Brentwood or Riverhead to check out our pergola collection for yourself!