One Call Services

What They Do

Water DamageMoldMold TestingFire and SmokeSewage

• Water Damage Inspection
• Water Damage
• Mold Inspection
• Mold Remediation

In Their Own Words

We are locally owned and based out of Fremont. We take pride in our superior customer service. One Call Services specialises in Emergency Water Damage, Water Damage Services, Flood Damage, Sewage Damage, Crawlspace Clean up, Sewage Clean up, Mold Removal, Mold Remediation, Mold Inspections, Mold Testing and Mold Estimates for your residential and commercial properties. We handle any size loss and work with all insurance companies. We Proudly Service: Alameda, Albany, Berkeley, Castro Valley, Dublin, Emeryville, Fremont, Hayward, Livermore, Newark, Oakland, Piedmont, Pleasanton, San Leandro, Union City, Campbell, Cupertino, Los Altos, Los Altos Hills, Los Gatos, Milpitas, Mountain View, Palo Alto, San Jose, Santa Clara, Sunnyvale, Saratoga

Written by the business on its public profile. We have not verified these claims.

Before You Call One Call Services

1. Do you take moisture readings every day and will you give me the drying log?
2. Are your technicians certified in water damage restoration?
3. Where do you think the moisture is coming from, and who fixes it?
4. Will you set up containment and negative air, and how will you protect the rest of the home?
5. Do you also do remediation? If so, who checks your work?

Ask for the company’s California contractor license number and look it up with the Contractors State License Board. Also ask for proof of insurance and industry certification for the technicians doing the drying or mold work.

How Their Reviews Break Down

Counts from public listings as of September 23, 2026. A handful of reviews says less than a few hundred.

Read This While You Wait

• DIY with careWhat to Do in the First 24 Hours After Water DamageAn hour by hour plan for the first day after water damage. Make it safe, stop the source, document, remove water and start drying before mold can start.
• DIY with careSafe DIY Mold Cleanup for Areas Under 10 Square FeetA step by step method to clean up mold under 10 square feet safely, with the gear to buy, what to throw away, why bleach is not the default, and when to stop.
• Call a proMold Testing, When It Is Worth It and How to Read a Lab ReportWhen a mold test is worth paying for, which kind to ask for, why store kits mislead, and how to read spore counts, outdoor controls and a lab report yourself.
• Call a proThe First 48 Hours After a House FireWhat to do in the first two days after a house fire. Safe re-entry, utilities, insurance calls, securing the home, food, medicine and what never to clean.