We study linear neutral PDEs of the form ( ∂ / ∂ t ) F u t = B F u t + Φ u t , t ≥ 0 ; u 0 ( t ) = φ ( t ) , t ≤ 0 , where the function u ( ⋅ ) takes values in a Banach space X . Under appropriate conditions on the difference operator F and the delay operator Φ , we construct a C 0 -semigroup on C 0 ( ℝ − , X ) yielding the solutions of the equation.