Alexander Company

Alexander Company is a window, door, and skylight installation contractor serving Burlingame and the broader SF Peninsula from a showroom located in the city. The company holds contractor license #642553 and has maintained a 4.8-star average across 158 homeowner reviews, reflecting consistent service quality in a market where window installations often generate mixed feedback. Their service area includes Burlingame, San Bruno, and surrounding Peninsula communities, where they handle both residential single-family projects and multi-unit apartment portfolio work.

What distinguishes Alexander Company from many regional installers is their commitment to in-house labor. The website explicitly states they use no subcontractors, meaning every window and door installation is performed by their own certified team. They carry an extensive brand portfolio including Marvin, Milgard, Simonton, Andersen, Therma-Tru, and Velux, offering homeowners across the Peninsula access to major manufacturers through a single local dealer. The company holds Diamond Certified status and BBB A+ accreditation, credentials that require independent audit verification.

Reviewers who left detailed feedback highlight specific team members by name. Rosie and Trish appear in reviews of apartment portfolio work, with one reviewer noting their organized approach from scheduling through completion. Another reviewer describes a manufacturing defect where one window arrived incorrectly sized; the installation team installed the other windows, returned two weeks later with the correct unit, and the company responded quickly despite full payment already being processed. A separate reviewer mentions the crew returned to address missed caulking on trim work, demonstrating follow-through on post-installation issues.