  We study admissible observation operators for perturbed evolution equations
using the concept of maximal regularity. We first show the invariance of the
maximal $L^p$-regularity under non-autonomous Miyadera-Voigt perturbations.
Second, we establish the invariance of admissibility of observation operators
under such a class of perturbations. Finally, we illustrate our result with two
examples, one on a non-autonomous parabolic system, and the other on an
evolution equation with mixed boundary conditions and a non-local perturbation.
