If you'd rather build a home than buy one and you can relate to either of the scenarios described here, it would probably be best to use a custom home builder's services.
You've bought an undeveloped piece of real estate that features a large hillside
If you have purchased a piece of undeveloped real estate that features a big hillside, then you will need a custom home builder's help. The reason for this is that a hillside is not the ideal plot on which to build any structure. However, a custom home builder could help you to do this without having to make major changes to this plot first.
For example, they would have the skills to construct a home that is built into the hill (so that a part of the house would essentially be underground); this could not only create a really unusual piece of real estate but would also be less labor-intensive than, for example, creating a level plot by filling in the bottom of the hillside with soil or by removing the upper sloped section. The latter is something that an unspecialized builder might offer to do in these circumstances because they might not have enough expertise to build a house into a hill.
If you want the construction of your home to be as brief as possible, to require a minimal amount of prep work and to not alter the landscape of the real estate too dramatically, then you should use a custom home builder's services.
You want a slightly eccentric, wacky house that is fun to live in
If you would describe your decor and design tastes as slightly wacky and eccentric, then you would probably be a custom home builder's ideal client. The reason for this is that if you get a custom home builder to create a house for you, you don't have to abide by the design principles that most home builders tend to follow. Because builders of this ilk have the ability to make almost any style of house you want, the home they construct for you can be as wild, imaginatively designed and outrageous as you want it to be.
For example, you could have them build a staircase that has a slide attached to it that you can use to glide down to the ground floor whenever you don't feel like walking. You could also have them build huge, irregularly shaped windows or get them to build a room that looks like the interior of an igloo. You could also have them fit a fireplace in your bathroom or build a stone tower on the side of the house that resembles those described in fairytale books. In short, the only things that will limit your project will be your imagination and your budget.
To learn more, contact a custom home builder.