My suggestion: figure out ways that magic lets you do things differently than even modern technology.
For example - if teleportation gates are easy to create, you could have the following effect:
The well-to-do live in homes that are built *up* rather than out. Each room is its own 'cell' that is stacked up with the others to make the best use of the space. There are no doors or connections between the rooms.
Travel between rooms is accomplished with door frames that act as gates. Place one frame in the wall in one room and another in a completely different room - viola! You now pass through the doorway and are teleported between the rooms, even if they are on different floors.
If you get tired of the 'arrangement' of your house, you simply have servants re-arrange the doors to your liking.
"When the Baron comes to visit, I want a new set of double doors in the Great Hall that lead to the Gallery, so that he can easily come to view my illusion sculptures."
This also lets you close off rooms that you don't want used. Just take down one of the doorways and put it away in the basement, with the others.
Additionally, doors can be pulled off the walls to provide privacy. Simply turn the door around, and the one-way teleportation effect goes to a solid wall. This might be a nice way to introduce the magical effect. PCs walk into a room, and the homeowner says 'let me make sure we aren't disturbed', takes the open doorway off the wall and turns it around.
Windows can be handled in a similar fashion. Even a closet buried deep in the ground can have a window that allows air and sunlight into the house - just set up a large, empty barn in the country, fill the walls with magical teleporting and televiewing windows, and stick the matching ones on your walls in the city. Ta da! Nice views, sunlight, and fresh air.
Of course, if a burglar gets her hands on one of your unused doors secretly, they have a nice way to silently enter your lavish fortress home.
Think of doing things differently with magic. Why have a create water spell that acts as a shower when you can enchant an archway with a "clean" spell and walk through it after arising in the morning?
Why make horseless carriages mimicking our cars when people can fly or teleport everywhere?
Why have lights on poles when you can simply enchant the cobbles of the street to cast light of their own? For that matter, why have streets, since anyone of importance can fly or teleport? Streets are for proles - they'll take dirt and like it.
=Mik
(edited to include door-turning idea)