Finally, a Two Family with exceptional Upside in Prime PLG/Flatbush Border. Welcome to 124 Martense Street, a classic 20' x 55' two-family barrel front townhouse located at the crossroads of Flatbush and Prospect Lefferts Gardens. The two family, 20 ft x 55 ft home is rich in period details. Inside you'll find stunning inlaid hardwood floors, ornate Victorian mantels, a grand pier mirror, and intricate original woodwork,. All of these rare architectural touches speak to the home’s history. While the property requires TLC, these preserved elements offer an incredible starting point for restoration or conversion. Set on a 20.33 ft x 117.83 ft lot and zoned R7-1 with a residential FAR of 3.44, this property offers a tremendous development opportunity with 5,782 square feet of unused buildable, allowing for a maximum usable floor area of 8,118 square feet. Whether you're a developer seeking your next project or an end-user with vision, the potential here is undeniable. Each floor can be its own rentable unit or you can combine the first and second floors into a spacious grand one family home. Located on a charming, tree-lined block near the heart of PLG, you are close to Prospect Park and the B/Q trains. Lot Size: 2,360 SF (20.33' x 117.83') Zoning: R7-1 / Residential FAR 3.44 Max Buildable: 8,118 SF Unused Buildable: 5,782 SF End-users, investors, and developers—bring your architect and vision. This is a rare chance to transform a historic home with architectural pedigree or build new on a generously zoned lot in one of Brooklyn’s most dynamic neighborhoods. Cash offers preferred. Shown by appointment.