| Business | Phone |
| A & E Architects Pc 608 N 29th St, Billings 59101 | (406) 248-2633 |
| Ackerly Hurlburt & Assoc 3970 Avenue D # B, Billings 59102 | (406) 652-4015 |
| Aia Montana 1629 Avenue D # C8, Billings 59102 | (406) 259-7300 |
| Anderson Architects 5415 Sweetgrass Creek Dr, Billings 59106 | (406) 651-5272 |
| At Architechture 170 Erickson Ct S, Billings 59105 | (406) 698-1582 |
| Atwood Architecture 1301 Division St, Billings 59101 | (406) 245-9988 |
| Bauer Group Architects 511 Grand Ave, Billings 59101 | (406) 259-8234 |
| Cbg Architects 1616 Broadwater Ave, Billings 59102 | (406) 656-5862 |
| Collaborative Design Architect 2280 Grant Rd # C, Billings 59102 | (406) 248-3443 |
| Schutz Foss Architects 3030 4th Ave N, Billings 59101 | (406) 252-9218 |
| Space Planning For People 2817 2nd Ave N # 202, Billings 59101 | (406) 245-5082 |
| Spectrum Group Architects 3203 3rd Ave N # 200, Billings 59101 | (406) 248-4443 |
| Cta Architects Engineers 13 N 23rd St, Billings 59101 | (406) 248-7455 |
| Cta Architects Engineers 1500 Poly Dr # 201, Billings 59102 | (406) 248-7455 |
| Design Lab Architects 100 Poly Dr, Billings 59101 | (406) 245-5071 |
| Devitt Associates Architects 490 N 31st St # 105, Billings 59101 | (406) 248-3554 |
| O 2 Architects 208 N 28th St # 350, Billings 59101 | (406) 259-7123 |
| Harrison G Fagg & Assoc 222 N 32nd St # 800, Billings 59101 | (406) 248-7811 |
| High Plains Architects Pc 1 S 28th St # 102, Billings 59101 | (406) 896-0250 |
| Jga Architects-Engineers 644 Grand Ave # 1, Billings 59101 | (406) 245-6363 |