Background-image not showing

put quotes around your image url

background-image:url("../images/House-03.png");

ETA : per comment below... quotes are indeed not required! just mentioned it here to troubleshoot the original question.

I personally had the pathname and url syntax correct. The only issue was

background-img: url("") 

needing to be changed to..

background: url("")

And my background pattern revealed itself triumphantly.

try setting the background image size property

.house {
    display:block;
    position:absolute;
    background:url(../images/House-03.png);
    background-repeat:no-repeat;
    background-size: 100% 100%;
    width:122px;
    height:148px;
    float:right;
    bottom:0;
    right:0;
}

hope this helps?