Explore Our New Hampshire ADU Designs To help simplify things, we’ve organized our ADU Concepts into three main groups based on whether they have a garage or not. Any of the three can be either attached to the primary house or detached, depending on your needs. Attached designs can be a bit more complex and therefore take longer and cost more, but sometimes that is the only path forward and do not worry - we handle that all the time! See our FAQ fore more information.