Historic Preservation Commission continues review of large side addition at 628 Northwest 16th Street

At its May meeting the Historic Preservation Commission continued consideration of an application by Britney Portree of James Gray Homes for work at 628 Northwest 16th Street in Mesta Park. Commissioners did not approve the project and moved the item to the July 2 commission hearing to allow the applicant and staff more time to refine materials, proportions and documentation.

The application seeks to enclose and substantially expand a side-facing wing of the house and to reconfigure the yard. Katie (Historic Preservation staff) told commissioners that staff’s primary concern is the proposal’s prominence from the public right-of-way and whether it meets the guidelines that call for additions to be “constructed to the back of the property or on a non-character-defining elevation, preferably not visible from the public right-of-way” (Historic Preservation Guidelines 4.3.0.2).

Why this matters: front- and side-facing additions change how a historic house reads from the street and can set precedents across a district. Commissioners repeatedly cited the guidelines’ direction that additions be secondary, visibly distinguishable from the original house, and proportioned to the historic building’s height-to-width ratios.

What the applicant said: Britney Portree, the applicant, said the design team had reduced visible massing and changed the roof to a flat profile. “We made a few changes based on the recommendations … we made it a flat roof taking off 50% of the visible structure,” Portree said, describing revisions intended to lessen the addition’s street presence. The applicant also provided precedent photos and said the lot has substantial hardscape and a pool at the rear.

Commissioners’ concerns focused on three issues: (1) scale and massing — several commissioners said the addition reads as broadly horizontal and out of proportion with the house’s vertical character; (2) visibility — staff and several commissioners said the addition remains visible from the public way in a way the guidelines caution against; and (3) plat setback and permitting risk — staff identified language on the original plat that establishes a 20-foot east-side setback “for driveways and landscaping,” and legal staff had advised that the plat language remains in effect. Katie told the commission that zoning and permitting may still bar construction into that setback and that the project could be required to return if zoning does not permit the location as proposed.

Quantities and technical points raised in the meeting: the applicant reported the proposed addition as about 480 square feet; site coverage in revised materials was listed at about 69% in the packet; staff noted that additions should not exceed “50% of the square footage of the footprint of the existing historic structure, enclosed space only, or 750 square feet, whichever is larger” (Guideline excerpt cited by staff).

Next steps: Commissioners voted to continue the item to the July 2 hearing so the applicant can (a) work with staff to refine the massing and elevation drawings, (b) supply clearer documentation on lot coverage and set‑backs, and (c) provide precedent and materials samples that make the proposed differentiation between old and new explicit. Katie and staff also suggested the applicant pursue one-on-one review with staff between meetings to try to resolve items that could otherwise be handled administratively.

Speakers quoted in this article are drawn from the meeting transcript and appear in the speakers list below.