A screened-in porch is a patio or deck with a roof and screen surround that keeps out bugs, sometimes with a fan and lights installed.
| PROS | CONS |
| – Protection from the sun, insects, pests, and light rain – Lower material and building cost than an addition – No heating or air conditioning costs |
– In Maryland, it’s only comfortable for about six months out of the year – Does not protect from heavy rains, pollen, and dust |

In many cases, with a patio, it is relatively easy to add posts, screens, and a roof to create your ideal space. However, if you want to make a screened-in room over a deck, your contractor will still probably need to rebuild the deck to accommodate the extra weight while staying up to local building codes.
A 3-season room is an addition with a roof, energy-efficient windows, and HVAC hook up that is a comfortable space for most of the year.
| PROS | CONS |
| – Protection from most weather conditions – In Maryland, it’s comfortable for up to 10 months out of the year – Versatile space for dining and entertaining |
– More expensive to construct than an open deck or screened-in porch – More costly to maintain in extreme heat and cold |

However, a 3-season room is not insulated like the rest of the rooms in your home, so you shouldn’t expect to be able to keep it at the same temperature. Additionally, it is not usually possible to turn an existing patio or deck into a three-season room. It is more likely that you will need to build an addition up to local code to support the weight of the windows, roof, electricity, and HVAC system. Because of this, a 3-season room is going to be more expensive than a screened-in porch both to build and maintain.
So, a screened-in porch is perfect if you want a space to spend time in the shade during the warmer months without being annoyed by insects, pests, and summer showers. In comparison, a three-season room is a more reliable place for entertaining and dining during the temperate months. Whichever addition you choose, make sure you find an experienced and licensed contractor you trust, like Brothers, to follow local building codes.