This style of architecture became quite popular in the United States between the 1890's and 1940's. Interiors, because they are small, can give a cluttered but utterly functional appearance, with artistic niches and nooks, and knick-knick decor. Cottages are designed for a relaxed, simple lifestyle - places to come home to, kick off your shoes, and flop on the furniture. They are not designed to impress other people, but to make their owners feel good. Cottage living often involves gardening, and most cottage owners spend their weekends and vacations outside in their backyards, digging in the dirt and growing flowers and vegetables.
A few questions you will need to answer will include: how many bedrooms, whether or not to have a family room, if a separate study room is valuable, and if internal garage access will be important. Plans come in both 2D and 3D versions for you to review before building begins. You will want to go over these with a fine toothed comb, as changes are much easier to make on the blue prints then once actually constructed on the ground.
Nowadays architectural soundness has acquired a new meaning, with the advent of sustainable designing. A dwelling sheathed in solar panels has a very different aesthetic than the usual suburban house. Multi-unit housing which eliminates the thermal bridges created by extensive glazing and concrete decks do not share the aesthetic of glass paneled high rise towers. Passive solar designs often borrow elements from local architectural styles to address local climactic conditions.
Look for reputable designers. There are hundreds of different builders out there and every single one has a different history and reputation within the community. If you take the time to check out all of the available designers, you should have no trouble finding the best in the industry.