4-L Engineering Company INC
TDLR-Licensed A/C Contractor · License 4772
TDLR lists 4-L Engineering Company INC under Texas air conditioning and refrigeration contractor license 4772.
Licensed individual on file with TDLR: Charles Lee Hansford.
TDLR shows the license as valid through August 17, 2027.
Its Google listing gives the address as 420 N Dorothy Dr, Richardson (Dallas County).
Google reviewers rate it 3.2 out of 5 across 20 reviews.
License record
| TDLR license | A/C and refrigeration contractor license 4772 |
|---|---|
| Licensed individual | Charles Lee Hansford |
| License expires | August 17, 2027 |
| County in the license file | Dallas County |
| Location | 420 N Dorothy Dr, Richardson, 75081 |
| Google rating | 3.2 out of 5 from 20 reviews |
| Hours (Google) | Open 24 hours, every day |
| Website | 4lengineering.com |
| Google Maps | View on Google Maps |
Source: TDLR air conditioning and refrigeration contractor license file (dated 10/14/2026); Google listing match verified. Verify the license at tdlr.texas.gov before hiring.
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