While you want your new custom home to look modern, it's also important that elements be timeless in order to build and retain the most value in the event you decide to put it on the market.
Timeless design isn't created to be temporary, a fad or a trend. It's created to have staying power and be just as appealing to people in a number of years as it is today. good design never goes out of style. It's highly functional, yet not boring, and is quietly understated, simple and sophisticated.
Just because you're going for a timeless design doesn't mean your home can't be modern and up-to-date, though. Just make sure that any features you include that may be trendy can easily be given a new look or adapted for other uses, and you'll protect yourself against obvious dating.
Thinking about how you'll use spaces will also help you choose rooms that you'll use and avoid wasted space. Do you really need that theatre room that everyone seems to want? If so, make sure the room is adaptable for other uses without having to spend a lot of money to convert it; avoid built-in's that are for a specific, trendy use.
Storage space is also important, especially in areas like the kitchen, laundry, linen closets, and bedroom closets.
When selecting expensive items such as flooring, countertops, built-in cabinets, and appliances, choosing natural materials may be more expensive but in the long run they're a safer bet as they're less likely to go out of style.
By choosing a classic, timeless home design and using decor and furnishings to tweak the look for modern trends, you'll have the most flexibility in your new home while also building the highest resale value.