Single-sided NMR has the potential for broad utility, especially as a portable diagnostic for disorders in fluid regulation. These sensors require a remote, high field, uniform magnetic field to achieve sufficient sensitivity. We demonstrate a new magnet geometry, the Unilateral Linear Halbach, that combines design principles from sweet-spot and linear Halbach magnets to achieve this goal. Sensitivity analysis using finite element analysis produces a generalized framework for Unilateral Linear Halbach design. Experimental validation through the fabrication of a magnet assembly shows close agreement with the simulated magnetic field. Unilateral Linear Halbach magnets increase the sensitivity, portability, and versatility of single sided NMR.