| Company name | Reg. code |
|---|---|
| PRELAB OÜ | 12789932 |
| PREHAB OÜ | 12546276 |
| PREFAB GROUP OÜ (former name Ösel House OÜ) | 12173906 |
| HAGS PREFAB OÜ | 16475202 |
| MP PREFAB OÜ (former name MP Trade Agency OÜ) | 14839752 |
| PREFAB PRODUCTION OÜ | 17466033 |
| PREFAB ELEMENT OÜ | 14595422 |
| NORDIC PREFAB OÜ | 16970568 |
| KMT PREFAB OÜ | 10861173 |
| HARMET PREFAB OÜ | 14938847 |
| THÖRN PREFAB OÜ | 17024714 |
| WOODEC PREFAB OÜ (former name Savetime OÜ) | 12821854 |
| AIVAL PREFAB OÜ kustutatud | 14651646 |
| Q PREFAB OÜ kustutatud (former name Revolution Prefab OÜ) | 14644244 |
| PINSKA PREFAB OÜ | 16124141 |
| ÖSEL PREFAB OÜ kustutatud (former name Lilp OÜ) | 16212632 |
| BORDERLESS PREFAB OÜ | 16957409 |
| PREFAB EHITUS OÜ | 11952347 |
| MM PREFAB OÜ kustutatud | 16476041 |
| INHUS PREFAB OÜ (former name OÜ TMB Element) | 12560626 |
| TAMAISTO PREFAB OÜ | 16154932 |
| PREAB INVEST OÜ kustutatud | 10467466 |
| NORD HOMES PREFAB OÜ (former name Nord Prefab) | 12664745 |
| NORDIC PREFAB.HOUSES OÜ | 11011952 |
| MASSIVA CLT PREFAB OÜ | 16466969 |
| PREFAV OÜ | 16200669 |
| PREKLAD OÜ | 14143648 |
| PRELAIN OÜ kustutatud | 10038205 |
| CITY WORKS OÜ (former name Prefab Project OÜ) | 12757599 |
| HAPPY HOME EHITUS OÜ (former name HH prefab OÜ) | 12016779 |
| PRENAR TRADING OÜ | 11624790 |
| PRELIA GRUPP OÜ kustutatud | 11177500 |
| QHP123 OÜ (former name Q-haus Prefab OÜ) | 14612959 |
| LA PRELLI EXPERT OÜ | 17333102 |
| PROLAB OÜ | 14396792 |
| PROLAB COSMETICS OÜ kustutatud | 12191695 |
| IT PROLAB OÜ | 16142191 |
| ARELAX OÜ (former name KP Grupp OÜ) | 14098563 |
| BREALAB OÜ kustutatud | 14820965 |
| PARKLAB OÜ | 16483437 |
| EVELAB OÜ kustutatud | 14923168 |
| TREELAB OÜ | 17063252 |
| ICELAB OÜ | 12820872 |
| PSYLAB OÜ | 17258139 |
| RELABZ OÜ kustutatud | 14451893 |
| ARTLAB OÜ (former name Ansve Beauty OÜ) | 12905674 |
| PEEMAB OÜ | 14525367 |
| PETLAB OÜ | 16154656 |
| THELAB OÜ | 12887267 |
| POPLAB OÜ | 14772137 |