There is no definitive answer to this question as it depends on a number of factors, such as the quality of the kitchen, how well it has been maintained, and so forth. However, in general, a kitchen should last for around 10-15 years before needing any major repairs or replacement. Of course, if you take good care of your kitchen and keep up with regular maintenance, it could last even longer. So if you're wondering how long your kitchen will last, it's important to keep these things in mind.