The minimum distance required is 15" either side/ that is minimum.
The standard measurement for a toilet drain rough-in is 12 inches from the finished wall to the center of the drain.
To measure the toilet rough-in without removing the toilet, you can use a tape measure to measure the distance from the wall behind the toilet to the center of the closet bolts at the base of the toilet. This measurement will give you the rough-in measurement, which is typically either 10, 12, or 14 inches.
18 inches to center
The recommended depth for installing a rough-in for a toilet drain is typically around 12 inches from the finished floor level.
The dimensions required for installing a Toto 10-inch rough-in toilet are typically a minimum of 10 inches from the wall to the center of the drain pipe. This measurement ensures proper alignment and fit for the toilet installation.
Would be risking damage to the tank and possibly open for a major lawsuit
A standard toilet roughs in at 12" from the wall.
12 inches from the center of the drain to the back wall behind the tank. Some toilets are 10" rough in. Also should be 18" from side wall to center of toilet if possible.
most toilets are set for a 12" inch rough in, that means before sheet rock and against a wood framed wall you would set your toilet flange 12 inches to the center of the flange to the edge of the wall and if you have something in your way like a floor joist or other you can buy a 10" rough in toilet or you can use a offset toilet flange which will offset your drain pipe from your flange to about 2 inches any direction and if you are setting a flange before a concrete floor I would measure 12.5 inches just to be safe from concrete workers etc hitting your pipes.The rough for a toilet can be 10" - 12" and 14"Depending on the type of toilet installed .. for example a wall hung tank normally would be a 14" rough becvause of the 2" slip ell supply from the Douglas vavleCertain Flushometer top spud require less then a back inlet bowl for finish
If you mean from the back wall to the center of the drain. The minimum standard rough in is 10 " - 12". IN ADDITION: This is a construction fault. Either you need to re do the plumbing or move the toilet across until it fits. This type of problem is quite a nasty one to fix.
10"- 12 "- 14 "
The required code for toilet clearance in a residential building is typically 15 inches of clearance on each side of the toilet and 21 inches of clearance in front of the toilet.