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| LAUGSTOL AS | 964715378 | PORSGRUNN |
| LAUKAS ELEKTRISKE AS | 879484952 | LILLESTRØM |
| LAUNES ENTREPRENØR AS | 956532337 | BYKLE |
| LAUPSTAD BYGG AS | 933725464 | HAMAR |
| LAURITSEN VVS AS | 920643086 | NORDRE FOLLO |
| LAUVÅSHYTTA AS | 913256336 | SØR-FRON |
| Lavangen Byggeindustri AS | 947725114 | LAVANGEN |
| LAVANGEN ENTREPRENØR AS | 913286669 | LAVANGEN |
| LAVANGEN MASKIN AS | 922048622 | LAVANGEN |
| LAVASOX AS | 997712528 | OSLO |
| LB BYGG AS | 923181849 | MOSS |
| LB ELEKTRO AS | 915624278 | LARVIK |
| LBI AS | 819503052 | KRISTIANSAND |
| L BROTUN RØRSERVICE | 968590162 | DRAMMEN |
| LBU AS | 916128983 | INDRE ØSTFOLD |
| LD BYGG LINAS DAVALGA | 927390515 | BERGEN |
| LE BYGG AS | 997098323 | VESTVÅGØY |
| LE-BYGG AS | 918698817 | BYKLE |
| LECON HOLDING AS | 993341800 | ÅLESUND |
| LEFDAL INSTALLASJON AS | 968545337 | BÆRUM |
| LEGALETT NORGE AS | 931986783 | HVALER |
| LEGANGER MASKIN AS | 911972646 | KVINNHERAD |
| LEGGETEKNIKK AS | 939522085 | GJESDAL |
| Leif Brun & Sønner A/S | 834464012 | MELØY |
| LEIF GRIMSRUD AS | 832516902 | HALDEN |
| LEIF K FJELDE AS | 929599853 | NARVIK |
| LEIF LIE EFTF. MASKIN AS | 991443436 | ØYGARDEN |
| LEIF MAGNE LOKØY | 970318437 | ØYGARDEN |
| LEIF NÆVDAL CONSULTING AS | 916896220 | ALVER |
| LEIF RUNARS AS | 995863243 | NES |
| LEIF STURLA LILLESTRØM MASKIN OG TRANSPORT AS | 999609090 | ALVDAL |
| LEIKNES AS | 942830068 | SENJA |
| LEIKVOLL'S KJERNEBORING AS | 976588894 | KLEPP |
| LEIN-NILSSEN AS | 986391134 | FROSTA |
| LEIRBOTN ENTREPRENØR AS | 981505646 | ALTA |
| LEIRNES RØR OG KJØL | 982438756 | HØYANGER |
| LEITHE & CHRISTIANSEN AS | 919513845 | OSLO |
| LEITHE ELEKTRO AS | 984681755 | LØRENSKOG |
| LEIV NESVIK | 884034132 | HÅ |
| LEKKASJETEKNIKK AS | 930698253 | OSLO |
| LEKVEN BYGG AS | 918023887 | BJØRNAFJORDEN |
| LEKVEN BYGGMESTERFORRETNING AS | 914005035 | BERGEN |
| LEKVEN ENTREPRENØR AS | 912158438 | BJØRNAFJORDEN |
| LEO HG AS | 815014332 | LIER |
| LEON BYGG AS | 916008422 | INDRE ØSTFOLD |
| LEONHARD NILSEN & SØNNER AS | 937843771 | ANDØY |
| LERCHE ARKITEKTER AS | 946890987 | OSLO |
| LERDAL BYGG AS | 830857192 | OSLO |
| LERVIK ARKITEKTER AS | 995661748 | GISKE |