403 S El Paso Avenue Ideal for investors or for building your dream home or family compound in Downtown Tucson's historic Barrio Viejo, recognized by Conde Nast Traveler as a top North American destination in 2024. This rare 11, 000 sq ft double-sized lot has been owned for generations by one of the original Barrio Viejo families and offers HR-2 zoning allowing up to two single-family homes with potential for an ADU. Prime location near El Minuto Mexican Restaurant, Tucson Convention Center, vibrant Downtown and 4th Avenue, Mercado San Agustin, and The Loop Bike Path. Nearby schools include Carrillo K-5 and Drachman Montessori K-8. The property includes a century-old adobe home being sold AS-IS. The structure is currently unsafe and not habitable. A City-issued stop-work order was implemented during demolition. Entry is prohibited. Buyer to conduct all due diligence, verify square footage and lot lines, and is responsible for repairing or removing the existing structure in accordance with City of Tucson and Barrio Historico (HPZ) Advisory Board guidelines.