| ONE DESIGN WERKZ PTE. LTD. | 201011549Z | BLK 1 #08-45 Tampines North Drive 1 T - Space | 528559 |
| ONE INCH SQUARE FEET STUDIO | 53140972D | BLK 625 #06-07 ALJUNIED ROAD ALJUNIED INDUSTRIAL COMPLEX | 389836 |
| ONE STOP BUILDERS PTE. LTD. | 201904534R | BLK 7030 #05-30 Ang Mo Kio Ave 5 Northstar@AMK | 569880 |
| ONE THIRD CHOICE RENOVATION CONTRACTOR | 37191100A | BLK 30 JALAN INTAN | 668790 |
| ONE-STOP CONCEPT PTE LTD | 200511052R | BLK 2 #03-148 JURONG EAST ST 21 IMM BUILDING | 609601 |
| ONEDERFUL KONTRACTOR PTE. LTD. | 202400062C | BLK 39 #03-10 woodlands close mega@woodlands | 737856 |
| ONTRAC DESIGN PTE. LTD. | 202029429N | BLK 46 #01-96 TOH GUAN ROAD EAST ENTERPRISE HUB | 608585 |
| ONYX CONSTRUCTION PTE LTD | 202015617E | BLK 1 #04-23 KAKI BUKIT AVE 3 KB1 | 416087 |
| OPT RENOVATION CONTRACTOR | 53128960E | BLK 151 #01-39 SERANGOON NORTH AVENUE 2 | 550151 |
| ORIENT INTERIOR | 52818158X | BLK 58 #01-507 Lengkok Bahru | 150058 |
| ORIENT RENO | 26563500D | BLK 58 #01-507 Lengkok Bahru | 150058 |
| ORIENTAL INTERIORS & CONCEPT PTE LTD | 200411838H | BLK 3 #04-01 Woodlands Industrial Park E1 Northland | 757726 |
| OSK INTERIOR & CONSTRUCTION PTE LTD | 200924151C | BLK 150 #12-04 THOMSON ROAD THOMSON EURO ASIA | 307605 |
| OUR INTERIOR PTE. LTD. | 201529466E | BLK 8 #05-45 KAKI BUKIT AVE 4 PREMIER@KAKI BUKIT | 415875 |
| OVERHAULED IN. DESIGN | 53261520D | BLK 501 #04-620 Hougang Ave 8 | 530501 |
| OVON DESIGN PTE. LTD. | 201712182W | BLK 53 JOO CHIAT PLACE | 427777 |
| OW BEE ALUMINIUM WORKS | 34258500B | BLK 1014 #01-176 GEYLANG EAST AVENUE 3 JTC | 389729 |
| OYSTA DESIGN & BUILD PTE. LTD. | 202005499C | BLK 8 #06-17 KAKI BUKIT AVENUE 4 PREMIER @ KAKI BUKIT | 415875 |
| OZ I.D. STUDIO PTE. LTD. | 200409700C | BLK 449 BALESTIER ROAD | 329826 |
| P & A LINK PTE LTD | 199406601N | BLK 5050 #01-1019 ANG MO KIO INDUSTRIAL PARK 2 ANG MO KIO INDUSTRIAL PARK 2 | 569553 |
| P & H BUILDING CONSTRUCTION | 53063097D | BLK 280 #02-01 Woodlands Industrial Park E5 Harvest @ Woodlands | 757322 |
| P CONSTANT CONTRACTS & SERVICES | 53002112M | BLK 36 #44-262 MARGARET DRIVE | 140036 |
| P.C. ANG BUILDERS PTE LTD | 201400891Z | BLK 31 #01-52 DEFU LANE 10 DEFU INDUSTRIAL ESTATE | 539212 |
| P.K.B. DECOR ENTERPRISES | 52851929L | BLK 66 Staint Anne's Wood | 545219 |
| P.W.C. CONSTRUCTION PTE. LTD. | 200719744E | BLK 558 #10-380 Hougang Street 51 | 530558 |
| PACE D & C PTE. LTD. | 201628764N | BLK 11 #09-33 Woodlands Close Woodlands 11 | 737853 |
| PACE PTE. LTD. | 201114560Z | BLK 31 #11-03 HARRISON ROAD FOOD EMPIRE BUILDING | 369649 |
| PACT BUILDERS PTE. LTD. | 201415507G | BLK 115 WOODLANDS INDUSTRIAL PARK E5 WOODLANDS E-TERRACE | 757494 |
| PAGODA BUILDING CONTRACTOR | 30108400M | BLK 257 Changi Road | 419746 |
| PAINTING GUYS PRIVATE LIMITED | 201802186G | BLK 63 #07-03D UBI AVENUE 1 63@UBI | 408937 |