Aruta, как вариант...
<!DOCTYPE html>
<html>
<head>
<meta http-equiv='Content-Type' content='text/html; charset=windows-1251' />
<script src='https://code.jquery.com/jquery-latest.js'></script>
<!--
<script src="https://code.angularjs.org/1.3.9/angular.min.js"></script>
<script src="https://code.angularjs.org/1.3.9/angular-route.js"></script>
-->
<style type='text/css'>
</style>
<script type='text/javascript'>
$(function(){
$('.upsale__block__sub-right-wrap :checkbox').click(function(){
if (this.id=='floor') {
this.checked=false;
this.disabled=true;
$(this).parents('.upsale__block__sub-right-wrap').find('.floor__item :checkbox').prop('checked',false);
return;
};
if (this.name=='groundfloor') {
if (this.checked) {
$('#floor').prop({
'disabled': false,
'checked': true
});
return;
};
var o=$(this).parents('.upsale__block__sub-right-wrap').find('.floor__item :checked');
if (o.length==0) {
$('#floor').prop({
'disabled': true,
'checked': false
});
};
};
});
});
</script>
</head>
<body>
<div class="upsale__block__sub-right-wrap">
<div class="upsale__block__bot-right__title-wrap dflex">
<div class="upsale__block__bot-right__title dflex">
<input id="floor" type="checkbox" class="block__check" />
</div>
</div>
<div class="upsale__block__bot-right__sub-wrap dnone">
<div class="montage__content-wrap">
<span class="montage__text">intro text where we explain </span>
<div class="montage__floor-wrap montage__comp-wrap dflex">
<div class="montage__floor dflex">
<div class="floor__item-wrap">
<div class="floor__item-inner">
<div class="floor__item">
<input type="checkbox" name="groundfloor" value="groundfloor">
<div class="floor__item__img">
<img src="catalog/view/theme/myown/image/floor/groundFloor.svg" alt="">
</div>
<span class="floor__item__text">floor__item__text 0</span>
</div>
<div class="floor__item">
<input type="checkbox" name="groundfloor" value="groundfloor">
<div class="floor__item__img">
<img src="catalog/view/theme/myown/image/floor/groundFloor.svg" alt="">
</div>
<span class="floor__item__text">floor__item__text 1</span>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>