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.
In fact, cottages - by which is meant small, asymmetrical, (usually) rural dwellings of one or two stories and stone, brick, or stucco exteriors, come in a large variety of architectural styles. European-type cottages can incorporate design traits from Tudor, Georgian, French, and Italian architectural styles, with open rooms and high ceilings, fireplaces, and even luxurious elements such as gourmet kitchens, formal dining rooms, private master bedrooms, and French doors. What all cottage styles have in common is their livability - their human scale and design for relaxing, unstressful enjoyment of life.
When you are searching for a designer, search for one that is local to the area where you want your home built. Typically, local designers will have a better knowledge of the region, the laws, and the other issues surrounding your new house building project.
Given their professional experience in house designing, it can be helpful to hear why certain elements will and will not work as you may envision. Your architect will be able to show you 3D walk through plans too. This can be useful exercise to examine sun patterns at different times of day and get a feel for the scale of your future modern home.