The quickest way is to open www.openstreetmap.org, go to the location of your house and click on Edit on top of the page. After the login procedure select the building and fill in the house number in the address tab. If there is no building yet, simply create it. If the satellite background images don't show your house yet, you might need some additional help (e.g. a gps track).

Once that is done, hit save. Your changes will be visible approximately

• usually within some minutes in online search results in Marble
• a couple of minutes or hours later in the map shown on openstreetmap.org (see also here)
• approximately 7 days later in Marble (but you can use the download region feature to force a reload of tiles to get changes much earlier)
• 1-14 days in offline search (assuming you update the monav offline map for that region inside Marble)