2,900+ local service businesses in San Mateo in our database, refreshed October 2026.
31% publish an email address — 922 you can reach by cold email.
746 have no website listed and 2,200+ have no Google rating yet.
82% of rated businesses hold 4.5★ or better.
Area codes
(650)2,500+
(415)152
(408)39
(510)29
(800)24
(888)16
A few San Mateo businesses
House Doctor Painting, Inc.Painting · 5.0★
Perfect Match Painting RdPainting · 5.0★
Toca Building DesignConstruction · 5.0★
E&H Duct Cleaning ServiceCleaning, HVAC · 5.0★
Eagle Legacy Roof Masters, Inc.Roofing · 5.0★
Caccia Home ServicesCleaning, Electrical, Plumbing, Property Maintenance · 4.9★
LB Construction & RemodelingConstruction, HVAC, Painting · 4.9★
Alternative HVAC SolutionsHVAC · 4.8★
Reaching out in the USB2B cold email is governed by CAN-SPAM: honest headers and subject lines, a physical address and an opt-out you honor. Phone outreach has its own rules, especially for cell phones. Read our CAN-SPAM guide and cold-calling rules before you start.