I'm all for the restoration and maintenance of our buildings. After decades of neglect, I am thankfull that both private parties and civic authorities have finally woken up. In a few years from now, I hope to see the majority of buildings across this country, fully restored. I know that Karachi and Lahore have some fantastic gems too!
Re: Jinnah House - you got me there. I'll get to it the next time I wake up early on a Sunday. 
The Taj Palace Hotel wasn't built by mistake, it's just that the entrance was switched to the harbour-side, on Apollo Bunder, about 40 years ago. 
Here's a quote from wikipedia -
The side of the hotel seen from the harbour is actually its rear. The front faces away to the west. There is a widespread misconception that the architects' building plans were confused by the builder so that he built it facing away from the harbor. This is not true, as the hotel was deliberately built facing inland, possibly because the horse carriages in which guests came to the hotel could more easily approach the hotel from the city.<SUP> </SUP>The carriages were then taken to Wellington Mews. 40 years ago, the old front was closed off, and since then, access has been made through the harbor-side entrance.
You're welcome. 