New answers tagged theme
While there is no explicit "house" tag, I would recommend browsing in Brickset's City theme: http://brickset.com/sets/theme-City You can refine the search based on year (include only recent, therefore easy to buy sets), tags (building, shop, ...) and subtheme (airport, construction, police, ...).
No, but Brickset now provides the facility to enable one to be made. See http://brickset.com/article/12960/tags-a-new-way-to-search-the-database
Top 50 recent answers are included