A rendering of Delaware Addition Phase II showing five buildings.

A housing complex with three four-story buildings, a two-story building and other buildings is proposed at Ingalls Alley in Santa Cruz. (MBH Architects)

Last updated: April 2024

Project name: Delaware Addition Phase II

Location: 100, 200, 300 and 400 Ingalls Alley

Phase II proposes new buildings on several lots on the northern part of the Delaware Addition.

Phase II of the Delaware Addition west of Swift Street and south of the Santa Cruz Branch Rail Line. (City of Santa Cruz)

Phase II of the Delaware Addition is about 3.4 acres. (Stephen Baxter – Santa Cruz Local)


The Delaware Addition Planned Development is a long-term, three-phase proposal to build housing, shops and industrial space on about 20 acres west of Swift Street in Santa Cruz. Phase II of the project is about 3.4 acres. 

The Santa Cruz City Council first approved planned development on the land in 2008.


The Santa Cruz-based Redtree Partners LP is the developer. RTP Delaware Avenue LLC is the development firm created for the project.

Project description for Phase II

  • Total housing units: 169 units, including 96 one-bedroom and 73 two-bedroom homes.
  • Affordable units: Seven low-income and 12 moderate-income units.
  • Height: Three four-story residential buildings, one two-story building with a leasing office and a fitness center and one single-story building with shops.
  • Details: 194 parking spaces are planned for residents and another 39 spaces of public parking. There are 217 bicycle parking spaces planned.


  • The Santa Cruz City Council on April 30 approved the lease of the units to UC Santa Cruz for rental to students, staff and faculty. The agreement between the city and developers of the Delaware Addition required amendment to allow the housing to be exclusively for UCSC, according to a city staff report.
  • City leaders approved a design permit in September 2023 and continued to review building permits as of April 1, 2024. 

Buildings in the first phase of the Delaware Addition stand toward Delaware Avenue in Santa Cruz in April 2024. (Stephen Baxter – Santa Cruz Local) 

Delaware Addition Phase II is bordered by the Santa Cruz Branch Rail Line and a parking lot for Swift Street businesses. (Stephen Baxter – Santa Cruz Local) 

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How to make your voice heard

Submit comments and questions on the City of Santa Cruz project page for 300 Ingalls Alley.

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