I am converting our 2 car garage into an apt and will need to install a toilet and shower. There is a concrete slab now what dimensions will I need to bust up the concrete to accommodate for the plumbing of the toilet depth by width by length and for the shower drain?
Thanks so much in advance.

Deb

Where do you live and where do you plan to get your supply and drain to the main drain?

I live in Cedar Creek, Texas. The line in is the easy part, it's the going out that I am trying to figure out. Why do you ask?

I asked because climate sometimes affects how we do the plumbing like overhead supply lines in the attic. If you live where it freezes we stay away from overhead. Also codes play a part in projects. For example where I live you must have more than a shower and toilet to make an apartment and we can't make a garage into a second residence. If you can sketch where you want your fixtures we could give you a better answer but, in general, I'd break out a 3'x5' rectangle up againist one wall where both the toilet and shower will be. You will need to tunnel out or trench for the drain to connect to your home, sewer or septic.

I have attached a drawing of what where I plan to install the shower, sink and toilet.
Thanks again.

Really no set guidelines on area to break up. Just need to break up enough to install plumbing with room to work. Better to open up more than not enough. Just mark out your rough in plans with a marker on the concrete and follow the lines with the jackhammer.

Go back on your drawing. Show us where the sewer line's llocated and where you want the sewer to exit the building. This we have to know before we can help I think you fall under UPC but you'll have to call your Building Department to be sure. Let us know about the sewer and code. Regards, Tom