Construction companies in Rio de Janeiro, Brazil

Rio de Janeiro has 39,425 construction company records in ISIC section F (construction), 39,425 of them active, according to the Receita Federal (CNPJ registry) as of 2026-10-10. That is 6.2% of the section in Brazil and makes Rio de Janeiro the 6th largest of 27 states for construction. The sector is under-represented here: 4.8% of Rio de Janeiro's records against 5.8% nationally (location quotient 0.82).

The city of Rio de Janeiro concentrates 48.3% of the active companies, followed by Niteroi (2,550) and Duque de Caxias (1,539); the three together hold 58.7%. The median active company is 8.0 years old; 8% were registered in the last year and 23% in the last three. In the 12 months to September 2026, 2,889 new construction businesses were registered in Rio de Janeiro, +5.7% on the previous 12 months (national section F: +7.4%). By ISIC division, 41 (construction of buildings) is 47.4% of the records and 43 (specialized construction activities) 43.9%. Size is known for 70% of the active companies; 77% of those are micro.

One of the largest sections in every registry and the noisiest: developers register a company per project (SPE/SPV), so division 41 overstates the number of operating builders. Division 43 (specialised trades) is where the actual contractors are. Construction-tech, building-materials distributors, equipment rental and fintech lenders use this section with a size or age filter.