Question by maggiero: If I get a pre-made new vanity top with a sink built in, how much should it cost to remove old one and install new. the old one is approx 3x2ft
Answered by LCD: Assuming it fits right, probably in the $250-500 range IF the drop-in location (if against wall) is true and square - there it gets more expensive is with vanities with integral backsplash and the walls are not a true 90 or are out of plumb or not flat - which means about 90-95% of the time.
The simplest and cheapest are usually where the countertop goes in first, then the backsplash is put in against the wall on top of the back edge/ends of the countertop so the wall being out a bit does not make for a bad fit, with the two backsplash pieces butting up against each other (rather than mitered joints). In that case, unless the walls are WAYYY out, the butted joints fo backsplash to countertop and backsplash to backsplash then conceal most wall sins - though you still have issues at the top of the backsplash if the wall is wavy.
In nasty wall cases, or where the backsplash is integral to the countertop and not custom-scribed and manufactured to fit the wall, can run well over $500 in some cases. I have seen more than a few so bad the countertop/backsplash had to be custom scribed and cut, or the drywall had to come off and be redone planar and square.
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