All & One Restoration and Construction

All & One Restoration and Construction holds a 5-star rating across 65 Google reviews, which matters significantly in West Covina, where older homes (median build year 1968) face real moisture challenges. The area's 61% average relative humidity and 19 inches of annual rainfall create conditions where mold can develop quietly in walls, attics, and crawl spaces. A contractor with that track record has likely handled the specific problems West Covina homeowners encounter. If you're facing mold concerns, this rating suggests you're looking at a trustworthy option.

Before hiring, confirm that All & One Restoration and Construction holds a valid California Contractor's State License Board (CSLB) license - California doesn't issue a separate mold remediation license, so the CSLB credential is essential. Request proof of current liability insurance and ask whether their team holds IICRC certification, which demonstrates professional training in mold assessment and remediation. Typical projects in this area run $1,800 to $5,500, so get a detailed estimate in writing. Always verify credentials independently rather than relying on verbal assurances.