Theodor Welliehausen Bauunternehmen GMBH

Company facts

Self-certified in SAM.gov

• For Profit Organization
• Foreign Owned

Entity structure

Corporate Entity (Not Tax Exempt)

NAICS codes registered in SAM.gov

• 236210 Industrial Building Construction Primary
• 236115 New Single-Family Housing Construction (except For-Sale Builders)
• 236116 New Multifamily Housing Construction (except For-Sale Builders)
• 236220 Commercial and Institutional Building Construction
• 237110 Water and Sewer Line and Related Structures Construction
• 237310 Highway, Street, and Bridge Construction
• 237990 Other Heavy and Civil Engineering Construction
• 238190 Other Foundation, Structure, and Building Exterior Contractors

Show all

• 238290 Other Building Equipment Contractors
• 238390 Other Building Finishing Contractors
• 423320 Brick, Stone, and Related Construction Material Merchant Wholesalers
• 423390 Other Construction Material Merchant Wholesalers
• 531110 Lessors of Residential Buildings and Dwellings
• 531120 Lessors of Nonresidential Buildings (except Miniwarehouses)
• 561790 Other Services to Buildings and Dwellings

SAM.gov registration date

Oct 9, 2026

Physical address

Jägerallee 8, 31832 Springe, Germany

Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated Oct 9, 2026.