Two techniques come quickly to mind: set up really big black panels to reflect black into the windows or shoot two images, one during the day and one after dark.
Hi Ellis, I agree, my thoughts exactly. One needs to reduce or eliminate the luminosity of the source of the refection
, the exterior structures are the issue.
Either darkening the exterior (shooting at night) or blocking the features (with black screens, perhaps in sections and combining layers in darker blending mode) seems to be all that can be done (other than taking out the window pane or extensive postprocessing).