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Commission continues landmark renovation at 504 W. Hallam amid concerns about massing, connector and TDRs

Aspen Historic Preservation Commission · July 9, 2025
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Summary

The commission continued consideration of a proposed restoration and two-story addition at 504 W. Hallam, asking the applicant to reduce the rear massing, refine a wide connector that currently occupies the historic footprint, and clarify underpinning/relocation and TDR math before a Sept. 10 return.

The Historic Preservation Commission continued review of a proposed restoration and addition at 504 West Hallam after staff and multiple commissioners raised concerns about guideline compliance, massing and the project's connector element. Applicant representative Sarah Adams described a plan to remove non-historic rear additions, restore the landmark footprint and add a two-story rear volume reached by a glassy connector; the team requested a 71-square-foot floor-area bonus and asked the HPC to recommend two transferable development rights (TDRs) to City Council.

Staff (Jillian) told the commission that, in staff’s reading, the proposal fails to meet several design guidelines: the proposed addition would be larger than the historic resource in above-grade floor area, is about seven feet taller than the one-story resource, uses similar roofing materials on new and old portions, and places a connector within the historic footprint rather than attached as a distinct, narrow passage. Staff recommended continuation to allow the applicant and staff to reconcile the design with guidelines; commissioners expressed repeated concerns about the perceived mass from the alley, the connector functioning as habitable space rather than a passage, neighbor impacts, and whether underpinning or relocation could be achieved without harming the resource. Commissioners voted to continue the application to September 10 to allow additional study and revisions.