Here is a list of idioms about buildings.

To be in the doghouse

To be in the doghouse is to be in real trouble.

I will be in the dog house when my boss finds out what I have done.

Rome wasn’t built in a day.

This expression is used to mean that it takes a great deal of time to accomplish something great.

Build castles in the air

To build castles in the air is to have daydreams.

To bank on something/someone

When you bank on somebody you are certain that they will be there for you when you need their help.

I don’t think we can bank on our guide.

To be banging/hitting your head against a brick wall.

To bang your head against a brick wall is to have to keep asking somebody to do something they don’t want to do.

Like a ton of bricks

When something (for example, a piece of news) hits you like a ton of bricks, you are deeply affected by it.

The news of his sudden demise hit me like a ton of bricks.

To burn your bridges

To burn your bridges is to do something that would make it impossible for you to return to your previous position.

Close to home

When something is close to home, it affects you emotionally and personally.

Hold the fort

To hold the fort is to take care of an office or store while the person in charge of that is away.

Make oneself at home

To make yourself at home is to behave as if you were at your own home.