The United Republic of Tanzania
CONTRACTORS REGISTRATION BOARD
The United Republic of Tanzania
CONTRACTORS REGISTRATION BOARD
| No. | Company Name | Registration Number | Managing Director | Type of Contractor | Class | Category | Physical Address | Postal Address | Town | Action |
|---|---|---|---|---|---|---|---|---|---|---|
| 1. | OLECO LIMITED | E5/423/01/2024 | JOSH MUROWE | ELECTRICAL | 5 | Local | SAM NUJOMA ROAD, SINZA AREA | P. O. BOX 79596 | DAR ES SALAAM | Details |
| 2. | OLISTRUCT CONTRUCTION LIMITED | C6/3332/05/2026 | DANIEL MORI | CIVIL | 6 | Local | KAWE | P. O. BOX 1559 | DAR ES SALAAM | Details |
| 3. | OLMASI CONSTRUCTION COMPANY LIMITED | C6/2641/05/2023 | MADARAKA ZUBERI | CIVIL | 6 | Local | LIVERPOOL STREET, HOUSE NO. 192 | P.O. BOX 42811 | DAR ES SALAAM | Details |
| 4. | OLMASI CONSTRUCTION COMPANY LIMITED | B5/1562/05/2023 | MADARAKA ZUBERI | BUILDING | 5 | Local | LIVERPOOL STREET, HOUSE NO. 192 | P.O. BOX 42811 | DAR ES SALAAM | Details |
| 5. | OLMOLOCK ENTERPRISES | C6/2273/05/2021 | MOSES MAKALANGA | CIVIL | 6 | Local | TEGETA KIBAONI | P. O. BOX 79567 | DAR ES SALAAM | Details |
| 6. | OLMOLOCK ENTERPRISES | B7/4765/05/2021 | MOSES MAKALANGA | BUILDING | 7 | Local | TEGETA KIBAONI | P. O. BOX 79567 | DAR ES SALAAM | Details |
| 7. | OLOSOKWA GROUP LIMITED | C6/2375/02/2022 | JESCA MAINGU | CIVIL | 6 | Local | KIHONDA MAGOROFANI, MOROGORO | BOX 602 | MOROGORO | Details |
| 8. | OLOSOKWA GROUP LIMITED | B6/1498/02/2022 | JESCA MAINGU | BUILDING | 6 | Local | KIHONDA MAGOROFANI, MOROGORO | BOX 602 | MOROGORO | Details |
| 9. | OLPESI CIVIL ENGINEERING LIMITED | C5/1744/11/2024 | OLOF MITILI | CIVIL | 5 | Local | P.O BOX 792 | DAR ES SALAAM | Details | |
| 10. | OLPESI CIVIL ENGINEERING LIMITED | B5/1840/11/2024 | OLOF MITILI | BUILDING | 5 | Local | P.O BOX 792 | DAR ES SALAAM | Details | |
| 11. | OLSH COMPANY LIMITED | B2/273/09/2025 | EMMANUEL TLUWAY | BUILDING | 2 | Local | KAGURU STREET | P.O. BOX65049 | DAR ES SALAAM | Details |
| 12. | OLSH COMPANY LIMITED | C4/638/03/2025 | EMMANUEL TLUWAY | CIVIL | 4 | Local | KAGURU STREET | P.O. BOX65049 | DAR ES SALAAM | Details |
| 13. | OMAGIB CONSTRUCTION COMPANY LIMITED | SPC3/1420/08/2022 | ABEL MAJALIWA | SPECIALIST CIVIL | 3 | Local | P.O. BOX 2979 | ILEMELA | Details | |
| 14. | OMAKEN GENERAL SUPPLIES | C7/1257/04/2007 | OMARI NURDIN | CIVIL | 7 | Local | IMCU BUILDING | P.O. BOX 1017 IRINGA | IRINGA | Details |
| 15. | OMASIMO CONSTRUCTION COMPANY LIMITED | C7/2143/10/2013 | JUMA OMARI | CIVIL | 7 | Local | PLOT NO. 42254, BLOCK B | P.O. BOX 8948 | MOSHI | Details |
| 16. | OMASIMO CONSTRUCTION COMPANY LIMITED | B7/4147/10/2013 | JUMA OMARI | BUILDING | 7 | Local | PLOT NO. 42254, BLOCK B | P.O. BOX 8948 | MOSHI | Details |
| 17. | OMATEK (T) LIMITED | E6/267/06/2024 | OMARY KASEJA | ELECTRICAL | 6 | Local | TOANGOMA, KIGAMBONI, DAR ES SALAAM NEAR USAGARA PETROL STATION | P.O.BOX 79793 | DAR ES SALAAM | Details |
| 18. | OMICRON POWER SOLUTION COMPANY LIMITED | SPE3/783/03/2022 | JUMA JUMA | SPECIALIST ELECTRICAL | 3 | Local | P.O BOX 851 | DAR ES SALAAM | Details | |
| 19. | OMNITECH ENGINEERING COMPANY LIMITED | SPE3/782/03/2022 | JOVINA MROSO | SPECIALIST ELECTRICAL | 3 | Local | TEGETA NAMANGA NEAR RABINSIA HOSP | P.O. BOX 75080 | DSM | Details |
| 20. | ON AFRICA CONSTRUCTION LIMITED | B1/284/07/2026 | NIAZHAN SHERMOHAMED | BUILDING | 1 | Local | KIGAMBONI, GEZAULOLE, BLOCK 15 PLOT 588 | P.O.BOX 5447 | DODOMA | Details |
| 21. | ON AFRICA CONSTRUCTION LIMITED | C1/238/07/2026 | NIAZHAN SHERMOHAMED | CIVIL | 1 | Local | KIGAMBONI, GEZAULOLE | P.O.BOX 5447 | DODOMA | Details |
| 22. | ONASSA 2000 CORPORATION LIMITED | C5/0495/08/2011 | GEORGE MTAMBALIKE | CIVIL | 5 | Local | KPM No. 715 | P.O. BOX 75356 | DAR ES SALAAM | Details |
| 23. | ONASSA 2000 CORPORATION LIMITED | B5/0620/08/2011 | GEORGE MTAMBALIKE | BUILDING | 5 | Local | KPM No. 715 | P.O. BOX 75356 | DAR ES SALAAM | Details |
| 24. | ONE BELT ELECTRICAL TECHNOLOGY GROUP LIMITED | E1/134/02/2026 | WANG WEIZHENG | ELECTRICAL | 1 | Foreign | PLOT NO. 16 BLOCK I KISIWANI STREET UBUNGO DAR ES SALAAM | P.O. BOX 75935 | DAR ES SALAAM | Details |
| 25. | ONE NAGG GROUP LIMITED | M2/30/09/2026 | MOHAMED NASSOR | MECHANICAL | 2 | Local | MEDELI - STATE OIL BUILDING DODOMA CITY | P. O. BOX 10250 | DODOMA | Details |
| 26. | ONE NAGG GROUP LIMITED | B2/222/03/2025 | MOHAMED NASSOR | BUILDING | 2 | Local | MEDELI - STATE OIL BUILDING DODOMA CITY | P. O. BOX 10250 | DODOMA | Details |
| 27. | ONE NAGG GROUP LIMITED | C1/192/03/2025 | MOHAMED NASSOR | CIVIL | 1 | Local | MEDELI - STATE OIL BUILDING DODOMA CITY | P. O. BOX 10250 | DODOMA | Details |
| 28. | ONE NAGG GROUP LIMITED | E2/167/09/2026 | MOHAMED NASSOR | ELECTRICAL | 2 | Local | MEDELI - STATE OIL BUILDING DODOMA CITY | P. O. BOX 10250 | DODOMA | Details |
| 29. | ONECS WORKERS GROUP | SPC2/348/08/2026 | ODILIA MLAY | SPECIALIST CIVIL | 2 | Local | ENGOSENGIU | P.O.BOX 2403 ARUSHA | ARUSHA | Details |
| 30. | ONEJH MECHANICAL ENGINEERING & FABRICATION LIMITED | M6/123/01/2025 | ONESMO MKUWA | MECHANICAL | 6 | Local | P.O BOX 72745 | DAR ES SALAAM | Details | |
| 31. | ONESTRUCTURE CONTRACTORS COMPANY LIMITED | C6/2475/07/2022 | ESTHER YEKENYA | CIVIL | 6 | Local | MAGOMENI USALAMA, MOROGORO ROAD, PLOT NO.5 BLOCK NO.40, HOUSE NO.5, DAR-ES-SALAAM | P.O.BOX 1779 | DAR-ES-SALAAM | Details |
| 32. | ONESTRUCTURE CONTRACTORS COMPANY LIMITED | B6/1556/07/2022 | ESTHER YEKENYA | BUILDING | 6 | Local | MAGOMENI USALAMA, MOROGORO ROAD, PLOT NO.5 BLOCK NO.40, HOUSE NO.5, DAR-ES-SALAAM | P.O.BOX 1779 | DAR-ES-SALAAM | Details |
| 33. | ONEVISION COMPANY LIMITED | C6/2699/06/2023 | JAMSON KANYIKI | CIVIL | 6 | Local | PLOT NO 6 BLOCK 'D' MANGA VETA | P.O BOX 1593 | MBEYA | Details |
| 34. | ONEVISION COMPANY LIMITED | B6/1715/06/2023 | JAMSON KANYIKI | BUILDING | 6 | Local | PLOT NO 6 BLOCK 'D' MANGA VETA | P.O BOX 1593 | MBEYA | Details |
| 35. | ONGUJO INVESTMENT COMPANY LIMITED | C3/179/11/2023 | ONGUJO NYAMARWA | CIVIL | 3 | Local | SEGEREA STREET | P.O. BOX 616 | DAR ES SALAAM | Details |
| 36. | ONGUJO INVESTMENT COMPANY LIMITED | B3/160/11/2023 | ONGUJO NYAMARWA | BUILDING | 3 | Local | SEGEREA STREET | P.O. BOX 616 | DAR ES SALAAM | Details |
| 37. | ONIKA WOMEN GROUP | SPC3/1250/11/2021 | NDENINGWA KITOMARI | SPECIALIST CIVIL | 3 | Local | NEW STAND STREET - SHINYANGA | P.O.BOX 575 | SHINYANGA | Details |
| 38. | ONIKE COMPANY LIMITED | C6/2405/04/2022 | ANDREW SHAYO | CIVIL | 6 | Local | KILUNGULE STREET KIMARA | P.O. BOX 45671 | DAR ES SALAAM | Details |
| 39. | ONYANGO COMPANY LIMITED | B7/4860/11/2023 | SALIM NYANGE | BUILDING | 7 | Local | IYUNGA | P. O. BOX 131 | MBEYA | Details |
| 40. | OPET CONSTRUCTION COMPANY LIMITED | C6/2507/08/2022 | PETER MWIJARUBI | CIVIL | 6 | Local | MAKONGO JUU | P. O. 15789 | DAR ES SALAAM | Details |
| 41. | OPET CONSTRUCTION COMPANY LIMITED | B6/1534/05/2022 | PETER MWIJARUBI | BUILDING | 6 | Local | MAKONGO JUU | P. O. 15789 | DAR ES SALAAM | Details |
| 42. | OPHRA ENTERPRISES COMPANY LIMITED | SPE2/478/12/2025 | DEUSDEDITH NG'WILABUZU | SPECIALIST ELECTRICAL | 2 | Local | HOUSE NO. 25 MSANYENGE STREET, KATORO | P. O. BOX 105 | KATORO | Details |
| 43. | OPPE CONSTRUCTION SERVICES COMPANY LIMITED | C6/2920/03/2024 | JACKSON MISHWARO | CIVIL | 6 | Local | MIYUJI MPAMAA NEAR ESPERANZA HOTEL | P.O BOX 1249 | DODOMA | Details |
| 44. | OPPE CONSTRUCTION SERVICES COMPANY LIMITED | E5/438/03/2024 | JACKSON MISHWARO | ELECTRICAL | 5 | Local | MIYUJI MPAMAA NEAR ESPERANZA HOTEL | P.O BOX 1249 | DODOMA | Details |
| 45. | OPTIMA INCORPORATED LIMITED | C5/1947/12/2025 | DENIS MALEWA | CIVIL | 5 | Local | MBEZI JUU | P. O. BOX 14687 | DAR ES SALAAM | Details |
| 46. | OPTIMA INCORPORATED LIMITED | B5/2021/12/2025 | DENIS MALEWA | BUILDING | 5 | Local | KAYUNI STREET, MBEZI JUU | P. O. BOX 14687 | DAR ES SALAAM | Details |
| 47. | OPTIMUM ENGINEERING WORKS LTD | C6/2030/02/2019 | DAVID MLAKI | CIVIL | 6 | Local | KIJITONYAMA DSM | P.O. BOX 10451 | DAR ES SALAAM | Details |
| 48. | OPTIMUM ENGINEERING WORKS LTD | B6/1261/02/2019 | DAVID MLAKI | BUILDING | 6 | Local | KIJITONYAMA DSM | P.O. BOX 10451 | DAR ES SALAAM | Details |
| 49. | OPTIMUM ENGINEERING WORKS LTD | SPE3/736/02/2019 | NICOLA MDOE | SPECIALIST ELECTRICAL | 3 | Local | KIJITONYAMA DSM | P.O. BOX 10451 | DAR ES SALAAM | Details |
| 50. | OPTIMUM HOLDINGS (T) LIMITED | C6/2713/07/2023 | WOLFGANG KING'OLA | CIVIL | 6 | Local | BAGAMOYO - MAPINGA | P.O. BOX 66622 | DAR ES SALAAM | Details |