When it comes to additions in Maryland, most Homeowners choose to increase the first-floor footprint. This is largely because it's easier and more cost-effective. The most common reasons for this type of addition are kitchen expansion, morning or sunroom additions, or creating additional living space. 

Second-story additions are another great option if you're looking to add more space to your home. The most common reason a Homeowner chooses to build up instead of out is space; yard space that is. Zoning restrictions, which vary by county, may also limit Homeowners' options leaving them with no choice but to build up. While this option is sure to cost more because of the additional labor required, it is a better use of space, and, when done correctly, will completely transform your home. 

Two-story additions are another option if you're looking to expand your home. The most common reasons a Homeowner will choose to add a two-story addition are to match their existing home, add an in-law apartment, or add a garage with a room above. A two-story addition can add significant space and function to your home. If you're looking to add considerable square footage to your home, this may be the option for you. 

Consult with your contractor regarding possible permit and zoning issues

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Determine where you'll be staying during the construction process. If you're building out, you can likely stay in your home, however, if you decide to build up, you may need to find somewhere else to stay at least for the beginning of the project until the second floor is framed out and closed-in.