Headquarters

353 Old Hays Rd.
Hays, MT 59527
406.673.3031
[email protected]

Billings Office

1537 Avenue D
Billings, MT 59102
406.969.6777
[email protected]

Havre Office

1753 U.S. Highway 2 – NW – SPC 36
Havre, MT 59501
406.400.2750
[email protected]

Please complete the form below and a member of our team will respond within 2-3 business days.



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    HEADQUARTERS

    353 Old Hays Rd.
    Hays, MT 59527
    406.673.3031
    [email protected]

    BILLINGS OFFICE

    1537 Avenue D
    Billings, MT 59102
    406.969.6777
    [email protected]

    HAVRE OFFICE

    1753 U.S. Highway 2 – NW – SPC 36
    Havre, MT 59501
    406.400.2750
    [email protected]

    OUR COMPANIES

    GVA Holdings, LLC
    Island Mountain Realty Holdings
    Classic Design Homes

    COMMUNITY PARTNERS

    Aaniiih Nakoda Community Foundation
    Life’s Language Lodge
    Nakoda Aaniiih Economic Development Corporation

    © 2026 Island Mountain Development Group