Landmark: Chelsea Historic District: Historic District. Regulation type: Certificate of No Effect. Work types: Filing any work, Primary Facades: Existing original/historic openings at small residential and commercial buildings, Removal of Existing Fire Escapes, Filling in existing openings at nonvisible or minimally visible secondary facades, HVAC equipment in yards and areaways fronting secondary facades, Recreate missing architectural features, Security gates at door openings below or under stoops, HVAC equipment and other mechanical equipment on rooftops or terraces over secondary facades, Interior Alterations, Cleaning/removal of paint/coatings, Repair of wood features. Address: 418 WEST 20TH STREET. Community Board: MN-04. Issued: 2020-05-14. Expires: 2024-05-14. Applicant: West Chin. Owner: David Lesser.