| Absolute Coatings | Absolute Coatings | — | (669) 294 6171 | Windows, patio, painters | Menlo Park · San Mateo County | — | — |
| Absolute Electrical | Jeffrey Alden Jonah | office@absoluteelectrical.com | (650) 654 7889 | Electricians | San Carlos · San Mateo County | — | — |
| Absolute Flooring | Husam Daoud Husari | — | (650) 726 8141 | GC, remodel, ADU | Half Moon Bay · San Mateo County | — | — |
| Absolute Flooring | Betty Elizabeth Husari | — | (650) 661 8153 | Other | Half Moon Bay · San Mateo County | — | — |
| Abstract Windows INC | Dimitar Blagoev Georgiev | — | (650) 863 0639 | GC, remodel, ADU | San Carlos · San Mateo County | — | — |
| AC & Lc Corporation | Lawrence U-Fai Choi | — | (650) 578 1981 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| Acaba Engineering Construction | Amor Canda Bautista | — | (650) 278 6843 | Electricians | San Bruno · San Mateo County | — | — |
| Academy Construction Services INC | Robert Barnes Woods | — | (650) 480 0715 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Accent Electric | Bernard Raymond Accristo | — | (650) 483 7653 | Electricians | San Mateo · San Mateo County | — | — |
| Access Cabling | Guido Rene Rodriguez | sales@accesscabling.com | (650) 212 1544 | Electricians | Redwood City · San Mateo County | — | — |
| Access Door Solutions INC | Scott Shelton Nola Untiedt | — | (650) 766 0719 | Other | Daly City · San Mateo County | — | — |
| Access Soil Drilling INC | Jonathan Justin Fone | max@accesssoildrilling.com | (650) 808 2200 | Other | San Carlos · San Mateo County | — | — |
| Access/affordable Floor And Window Coverings | Access/affordable Floor And Window Coverings | — | (650) 591 3822 | Other | Belmont · San Mateo County | — | — |
| Acclaim Homes INC | Mark Cyril Johnson | — | (650) 324 9021 | GC, remodel, ADU | Menlo Park · San Mateo County | — | — |
| Accutite | Eddy Armand Tabet | sales@accutite.com | (650) 616 1200 | GC, remodel, ADU | South San Francisco · San Mateo County | — | — |
| Ace Construction | Josh Joseph Adam | — | (650) 307 4614 | GC, remodel, ADU | Brisbane · San Mateo County | — | — |
| Ace Furnace Company INC | Joseph Christopher Byrne | — | (415) 661 8000 | HVAC | South San Francisco · San Mateo County | — | — |
| Ace Heating & Air Conditioning INC | Gregory Joseph Torre | — | (650) 571 6236 | HVAC | San Mateo · San Mateo County | — | — |
| Ace In The Hole | Ace In The Hole | — | (650) 200 6919 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |
| Ace Shower Door & Glass Ca. Lic# 998322 | Ace Shower Door & Glass Ca. Lic# 998322 | — | (650) 458-3414 | Windows, patio, painters | San Mateo · San Mateo County | — | — |
| Achus Electric | George Issac | — | (650) 270 8718 | Electricians | San Bruno · San Mateo County | — | — |
| Ackerman Construction | Michael Curtis Sr Ackerman | interested@domainmarket.com | (650) 271 2963 | GC, remodel, ADU | South San Francisco · San Mateo County | — | — |
| Acme Mechanical | Acme Mechanical | — | (650) 759 2990 | Other | San Mateo · San Mateo County | — | — |
| Acosta Construction | Acosta John | — | (650) 892 5400 | GC, remodel, ADU | Pacifica · San Mateo County | — | — |
| Ad Design And Construction | Djalali Ardalan | — | (650) 387 9272 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Ad Mechanical Services INC | Adlan Cherkesbiev | — | (510) 240 9011 | HVAC | Burlingame · San Mateo County | — | — |
| Ad Pro Painting LLC | Eduardo Arturo Paniagua | — | (415) 525 0604 | Windows, patio, painters | Daly City · San Mateo County | — | — |
| Adam Electric Company | Farris Ben Adam | — | (415) 244 7474 | Electricians | Daly City · San Mateo County | — | — |
| Adam Mc Aboy | Adam Mc Aboy | — | (650) 255 9602 | Windows, patio, painters | Menlo Park · San Mateo County | — | — |
| Adam O'neill Locksmith | Adam O'neill Locksmith | — | (415) 425 0996 | Other | South San Francisco · San Mateo County | — | — |
| Adamo Campagna Development | Adamo Alessandro Campagna | — | (415) 310 8937 | GC, remodel, ADU | Pacifica · San Mateo County | — | — |
| Adaptive Home Hardening LLC | Kenneth Louis Jr Bagwell | nigel@adaptivehomehardening.com | (775) 762 9328 | GC, remodel, ADU | San Bruno · San Mateo County | — | — |
| Adaptive Networks LLC | Joel David Gutierrez | — | (650) 345 8000 | Other | Millbrae · San Mateo County | — | — |
| Adary Electric INC | Nadav Adary | — | (650) 577 1100 | Electricians | Foster City · San Mateo County | — | — |
| Adelphia Design | Bill Theodoros Tsanakas | — | (650) 642 1977 | Windows, patio, painters | Redwood City · San Mateo County | — | — |
| Adl Plumbing | Adl Plumbing | — | (713) 927-1993 | Other | South San Francisco · San Mateo County | — | — |
| Adornment Painting INC | Adnan Ahmed Baalbaki | — | (415) 828 3862 | Windows, patio, painters | San Mateo · San Mateo County | — | — |
| Adrian Figueroa Construction INC | Adrian Figueroa | — | (650) 400 5852 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Adroit Builders INC | Anthony Daniel Juarez-Lessing | — | (650) 492 6071 | GC, remodel, ADU | Redwood City · San Mateo County | — | — |
| Adu San Mateo LLC | Elie Wadih Alchaer | — | (650) 200-2040 | GC, remodel, ADU | San Mateo · San Mateo County | — | — |