FIRST ONSITE Property Restoration

What They Do

Water DamageMoldFire and SmokeBiohazardStormOdorContents

• Fire damage cleanup & repair
• Remodeling
• Water damage-related cleanup & repair
• Water damage-related mold removal
• 24 Hr Emergency Response
• Catastrophic Event Restoration
• Climate Control
• Commercial Contracting
• Commercial Properties
• Comprehensive Reconstruction Services
• Content Recovery
• Content Restoration
• Customer Support
• Damage Control
• Demolition Services
• Disaster Planning
• Disaster Recovery
• Disaster Strikes
• Document Recovery
• Document Restoration
• Drying & Dehumidification
• Emergency Mitigation
• Emergency Response Planning
• Emergency Restoration Services
• Emergency Water Cleanup
• Emergency Water Damage
• Environmental Remediation
• Finish Work

In Their Own Words

First Onsite is a leading commercial disaster restoration and reconstruction company serving all 50 U.S. states and Canada. We specialize in water damage restoration, fire and smoke damage, mold remediation, and full property reconstruction for healthcare, education, retail, and more. Available 24/7, 365 days a year, our teams respond fast to minimize downtime and business interruption. With 110+ locations across North America, we combine local response with national resources at any scale. Contact us today at 800.622.6433 to build your pre-loss plan or get emergency help now.

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

Before You Call FIRST ONSITE Property Restoration

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. How will you deal with smoke odor inside wall cavities and the HVAC ducts?

Ask for the company’s contractor license number and look it up with the Arizona Registrar of Contractors. Also ask for proof of insurance and industry certification for the technicians.

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 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.
• Call a proTrauma and Unattended Death Cleanup, What Families Should KnowA gentle guide for families after a death or injury at home. What you do not have to do yourself, how cleanup works, who pays, and how to choose a crew.