A rare 16.7-acre development assemblage along Grass Valley Highway in Auburn, offering a balanced mixed-use opportunity. The 12.4-acre parcel at 1406 Grass Valley Hwy is zoned RM30-Dc, supporting high-density residential development at up to 30 units per acre. Recently rezoned from commercial to residential under Placer County's RHNA housing initiative, it reflects strong jurisdictional support and has already been included in the County's RHNA Environmental Impart Report (EIR). According to the County, projects dedicating 20% or more affordable units may qualify for administrative approval with staff-level review, dramatically lowering entitlement risk and timelines. Adjacent to this site, the 4.3-acre parcel at 1448 Grass Valley Hwy is zoned CPD-DC and offers stable income from two tenants while providing long-term development flexibility and prominent Hwy 49 frontage. This parcel is expected to provide primary access to the residential acreage, improving connectivity and design efficiency. Together, the properties create a cohesive project vision aligning with state housing mandates and Auburn's growing demand for residential and commercial uses. Both properties to be sold together. Cross listed under MLS #22514578.