Well it depends on your lifestyle, if you prefer to go out rather then entertain at home then probably not. But if entertaining is your thing and you love having friends and family over for all the occasions the yes, absolutely building an outdoor kitchen is for you.
Design your custom outdoor space with your lifestyle in mind, put some thought into the planning process this will give you the best result at the end. Talk to your Builder about the different options you have, if you can make allowances for electricity/gas and plumbing now and build the kitchen later down the track.
Are you wanting a full scale self sufficient outdoor kitchen or is a minimalist, low fuss but high style with prep space open shelving more your style? Also locating the outdoor space adjacent to the indoor kitchen will your place great flow.
What you'll need in your space depends on how you will use the space but at a minimum you'll need necessary cooking appliances, preparation spaces and a sink. You can go full scale also with refrigeration and dishwashers, pizza ovens and smokers. This will all depend on the space you have and budget.
Building an outdoor kitchen will drastically improve the value of your home, whilst being practical it also elevates your home and gives way for a great place to entertain friends and family. Having your Builder design and create your custom outdoor kitchen is a luxurious upgrade to your home but an upgrade you'll be glad you made!