John Langwasser Construction
Upland, California 91786
87/100
Excellent
Trust Score
License Details
- License Number
- 778396
- State
- CA
- Type
- B
- Class
- B
- Issued
- May 8, 2000
- Expires
- May 31, 2026
- Trade
- General Contractor
Bond & Insurance
- Bond Amount
- $25,000
- Bond Status
- Active
- Workers' Comp
- Exempt
Contact
- Phone
- (909) 982-1501
Data from CSLB. Last verified: May 9, 2026.
About John Langwasser Construction
John Langwasser Construction is a licensed general contractor based in Upland, California. This contractor holds an active CA license (#778396) , issued 26 years ago. With a Trust Score of 87/100, this contractor demonstrates strong compliance with state licensing requirements.