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11-Story, 425-Unit Affordable Project Breaks Ground in Potrero Hill

A market slump pushed the for-profit builder to pivot to a LIHTC‑ plus bond‑financed affordable model.

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The construction site at 300 DeHaro St., which was initially planned for market rate housing but will now sprout affordable homes.
Mark MacDonald says his developing firm, DM Development, could turn more projects into affordable housing.
Mark MacDonald, developer at DM Development, stands at 300 DeHaro St. in San Francisco. The site, which is currently under construction, will eventually hold 425 affordable housing units.

Overview

  • DM Development began construction on 300 De Haro, converting a previously approved market‑rate plan into 425 deed‑restricted apartments that are all affordable.
  • The project used Senate Bill 35 for ministerial approval, a step developers and state Sen. Scott Wiener credited with speeding permitting.
  • Studios and junior one‑bedrooms of roughly 300–400 square feet will target households at about 30%–70% of area median income, currently around $41,000–$95,000.
  • Financing includes low‑income housing tax credits and tax‑exempt bonds with MRK Partners as an affordable housing partner, and no city capital reported.
  • Completion is projected for summer 2027, an interest list is open, and neighbors have raised concerns over the 11‑story height, limited input under SB 35, and displacement of small businesses.