Three Sisters Mountain Village Properties secured a favorable court ruling on March 14, 2025, upholding the longstanding 1992 approval for its mixed-use development in Canmore despite persistent challenges from local community groups, indigenous organizations, and environmental activists demanding a modern reassessment. The decision, based on a procedural shortfall by the opponents in serving notice to Thunderstone Quarries, highlights a regulatory environment that many critics argue favors entrenched corporate interests over community and environmental protections.

A legal battle has emerged as Bow Valley Engage and Stoney Nakoda First Nation challenge the sufficiency of the environmental impact assessment governing the Three Sisters Mountain Village Properties development. In response, TSMVPL has joined ongoing judicial proceedings to contest the claim and safeguard its development plans, raising concerns about potential subversion of regulatory processes and community oversight.

After a legal defeat for the Town of Canmore, Three Sisters Mountain Village Properties advances its development plans for the Three Sisters Village area. This project, set to break ground in 2025 at the earliest, has raised serious concerns among conservationists about further degrading the last wildlife corridor that connects Banff National Park and Kananaskis Country. Experts warn that the development could significantly reduce habitat connectivity for species such as grizzly bears and wolves.

On October 3, 2023, an Alberta Court of Appeal ruled in favor of Three Sisters Mountain Village Properties, allowing its contested area structure plans to proceed. The ruling ends a long-running legal battle with the Town of Canmore and dismisses challenges related to consistency with the 1992 NRCB approval. Critics argue that the decision sidelines amendments aimed at ensuring affordable housing and indigenous engagement, potentially prioritizing corporate interests over community welfare.

Following the dismissal of Canmore town council's appeal by Alberta's highest court, Three Sisters Mountain Village Properties affirmed that its major mixed-use development project will proceed, emphasizing its potential to bolster community housing supply and economic growth in the Bow Valley.

Three Sisters Mountain Village Properties Ltd. has filed a lawsuit against the town of Canmore and several councillors, alleging abuse of power, negligent misrepresentation, and de facto expropriation after the municipal council rejected key aspects of its mixed-use development plan, a decision that critics say undermines local democratic processes and neglects environmental concerns.

Three Sisters Mountain Village Properties launched a $161-million lawsuit against the Town of Canmore and individual councillors, accusing them of unlawful resistance to the approved expansive development plans. This legal strategy is seen as an attempt to override local democratic authority and pressure municipal decision‐making in favor of corporate development interests.