Why Do I Have a Sewer Smell in My Home?

back pressure ,,,,,,,,,

busted sewer drain pipe somewhere,,calla plumbers or several to get one who carries a 100 ft snake rodder ( heavy duty) and a hi definition camera,, some of them out there bring only a 50ft line snake,meaning another trip to get a larger line 'u got a bad break in dere lady'

water traps need filling up i have one in the Kitchen sink

One in the Laundry sink one in the Laundry floor

One in the bath/shower one in the Toilet one in the Bathroom sink and one in the Bathroom floor

I fill a Jug with Hot water put 1/2 a cup of Bleach and Pour half down the Laundry Floor Drain and the Other Half down the Bathroom floor drain result No smells

and if you have an outside Drain it needs filling up at least once a month

If it's a smell of pee, it could be mice.

It appears you have a sewage leak from a bathroom or your sewage pipe.  You really need to get this checked out A.S.A.P. before it does a lot of damage.

A sewage smell in-house is usually a sign that your sewage treatment system has been damaged or has not received proper maintenance. Some of the following causes might be responsible and are worth checking first: P-trap: the drains of your toilets, shower, all have a P-trap (a curved part of pipe) that holds water.

how about emptying your rubbish bin or closing the toilet door  or even flushing your toilet , it might hep !!!! thought it might be coming from your drain ????

A sewage smell in-house is normally a sign that your sewage treatment framework has been harmed or has not gotten legitimate support. A portion of the accompanying causes may be capable and merit checking first: P-trap: the channels of your latrines, shower, all have a P-trap (a bended piece of line) that holds water.

Dry traps in floor drains are a very common way sewer smells get in the house.  Make sure you pour water in them at least monthly. 

M&R Drains are wankers.