Once a building is completed, are there any regulation if you want to structurally alter it?
Ie do you have to get planning permission to say build an extension or an add height to your property?
Keng, in our experience, it all depends upon who you are, what nationality, i.e. Turkish or otherwise, where your property is situated, i.e. fronting a main road/street, or on a side street, whether or not neighbours object, (if Turkish neighbours object, basically you are STUFFED ).
Turks bought the property in front of ours in a communal garden with only 3 properties on there, before they had even moved in, they had the side/front balcony closed in, (ILLEGAL), knocked down what used to be the end wall of the lounge, and then extended the lounge onto the now enclosed balcony. (ILLEGAL), They then had the entire roof removed, and raised by 2 metres, (ILLEGAL), to incorporate 2 full sized bedrooms and en-suite bathrooms.
We were also woken up at silly o'clock one morning by the sounds of workmen, who were busily fencing off the communal garden, (ILLEGAL), and extremely bad feckin' manners, which, by the way, Lorraine and I, along with Tony, our neighbour who had been murdered, had planted with various expensive trees, shrubs etc. I wrote 2 letters to the Belediye, officials from their "Technical Department" attended, took measurements, photos etc. , agreed on the illegality of the entire project, and done......................SWEET FU%&-ALL !!