SIC Code 1799 — Special Trade Contractors, Not Elsewhere Classified

4-digit industry in the 1987 Standard Industrial Classification — still requested by banks, insurers, SEC filings and legacy systems.

Code	1799
Title	Special Trade Contractors, Not Elsewhere Classified
System	SIC 1987 (final edition — replaced by NAICS in 1997)

The SIC was last revised in 1987 and officially superseded by NAICS in 1997, but it never fully disappeared: the SEC still tags EDGAR filings with SIC codes, and many banks, insurers and legacy databases keep requesting it. That is why converting between the two systems is still routine work.

NAICS equivalents of SIC 1799

From the official U.S. Census concordance (1987 SIC → 2002 NAICS). Where the 2002 code no longer exists in NAICS 2022, the closest current code is shown.

NAICS 2002	Title (2002)	Current 2022 code
236220	Commercial and Institutional Building Construction	236220 (same code)
237990	Other Heavy and Civil Engineering Construction	237990 (same code)
238150	Glass and Glazing Contractors	238150 (same code)
238190	Other Foundation, Structure, and Building Exterior Contractors	238190 (same code)
238290	Other Building Equipment Contractors	238290 (same code)
238320	Paint and Wall Covering Contractors	238320 (same code)
238350	Finish Carpentry Contractors	238350 (same code)
238390	Other Building Finishing Contractors	238390 (same code)
238910	Site Preparation Contractors	238910 (same code)
238990	All Other Specialty Trade Contractors	238990 (same code)
561790	Other Services to Buildings and Dwellings	561790 (same code)
562910	Remediation Services	562910 (same code)

Other SIC codes in 17xx

• 1711 — Plumbing, Heating and Air-Conditioning
• 1721 — Painting and Paper Hanging
• 1731 — Electrical Work
• 1741 — Masonry, Stone Setting, and Other Stone Work
• 1742 — Plastering, Drywall, Acoustical, and Insulation Work
• 1743 — Terrazzo, Tile, Marble, and Mosaic Work
• 1751 — Carpentry Work
• 1752 — Floor Laying and Other Floor Work, Not Elsewhere Classified
• 1761 — Roofing, Siding, and Sheet Metal Work
• 1771 — Concrete Work
• 1781 — Water Well Drilling
• 1791 — Structural Steel Erection

Data: 1987 SIC titles (OSHA/Census) and official Census concordance — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.