Planning board reviews draft West Chelsea mixed-use overlay; staff proposes high-density, design-first approach with no minimum parking

Chelsea planning staff presented the draft West Chelsea Mixed-Use Overlay District on Feb. 25 and sought board feedback on a package of form-based regulations meant to spur dense, walkable, transit-oriented development along Everett Avenue and adjacent parcels. The district map designates primary pedestrian streets, identifies permitted uses, and sets building-form controls intended to encourage active ground-floor uses and publicly accessible open spaces.

Staff emphasized three principal form controls: a floor-area-ratio-based approach (up to 7 FAR with a maximum buildable coverage of 75% of a lot), building height allowances of up to 12 stories (or 150 feet) in appropriate locations, and façade-edge requirements that seek to place 80% of primary street frontage within 5 feet of the lot line on primary pedestrian corridors. For taller buildings, a 5-foot step back is required above the 6th story to reduce street-level impacts.

Open-space standards are tied to lot size: 20% of lot area must be usable open space; for projects >30,000 sq ft, 50% of that open space must be on the ground floor and 5% of the lot must be publicly accessible open space with minimum clear widths and amenities. Staff said these publicly accessible spaces might resemble small plazas or pocket parks.

On parking, staff proposed removing a citywide minimum requirement to allow dense, transit-first development; parking may still be provided but would be designed to be screened from public view and located off private drives. To address travel impacts, projects larger than 30,000 sq ft would submit Transportation Demand Management (TDM) plans with a traffic-impact study and a menu of mitigation measures (bike parking, transit subsidies, shuttle programs, unbundled parking, shared parking, and other options) scored by staff. The TDM approach is intended as a flexible “living document” the department can update over time.

Board members and residents raised several concerns: how removing minimum parking would affect on-street parking and adjacent neighborhoods, whether residents of new units would be eligible for on-street parking permits, floodplain constraints for sites near Chelsea Creek and Mill Creek (staff confirmed FEMA floodplain coverage and conservation review is required), and whether an administrative waiver process to relax design standards would need stronger public oversight in some cases. Staff said most large projects in the district are likely to exceed the 30,000 sq ft site-plan-review threshold, which will trigger public hearings, and encouraged written board comments to refine waiver and public-notice language.

No vote was taken; staff requested additional written feedback and indicated a plan to return with refined language, a draft TDM scoring document, and clearer waiver criteria for public review.