Animated scrolling when intra-page links are clicked
Get the "respective" div in a more general way from the link's href attribute:

$('a[href=#certificados], a[href=#team], a[href=#house], a[href=#contact]').click(function(e){
    e.preventDefault();
    $("html, body").animate({ scrollTop: $(this.hash).offset().top }, 1000);
    // this.hash would be equivalent to $(this).attr("href") in your case
});


Probably you also can use a much better selector now - maybe selecting those links by a common class.