Rarely available legal nonconforming two-flat in the heart of Northfield-123 Happ Road offers a unique opportunity for investors, multi-generational households, or buyers seeking flexible rental income. Situated on a deep 18,208 sq ft lot, this two-story stucco residence features two full living units, each with its own kitchen, living area, and bedrooms, plus a full basement. While the home requires significant renovation, its grandfathered multi-unit status allows the next owner to preserve and enhance its income-producing potential in a top-tier location. Zoned R-4 single family, the property may continue to operate as a two-flat provided no structural changes are made and its use remains uninterrupted. Ideally located within walking distance to Clarkson Park, Mariano's, the public library and Northfield's Town Center, the property also offers quick access to I-94, forest preserves, and North Shore trail systems. Located in top-ranked Avoca District 37 and New Trier High School district 203, this is a rare opportunity to restore a multi-unit property in one of the North Shore's most desirable communities. The property is also being marketed as a land opportunity. Please contact the listing agent for complete details on zoning and nonconforming use. 119 Happ Road, directly to the south, is also available as both 2-4 unit and land. Please do not walk the lot without a confirmed appointment.