The cost to convert a carport into a garage averages about $22,000, ranging from about $15,000 and $55,000. Additional cost factors to consider include size, time of year, and how much of the carport you can reuse. Other cost factors include the kinds and amounts of materials used, such as:

• Add insulation: $1 per square foot

• Add drywall: $1–$3 per square foot

• Add window: $450–$2,000 per window

• Add outlets: $75–$500

• Add garage door: $250–$11,200

• Enclose framing: $5–$13 per square foot

• Replace roofing: $1,000–$2,000

Most Cape Cod houses are two stories tall at the peak, although they’re considered one-and-a-half stories tall because the steep roof pitch cuts off a portion of the living space on the second story. Unless you raise the roof on your Cape Cod house to add a dormer, the interior rooms upstairs will lose some usable living space to the sloped ceilings.

Learning how to frame a house includes picking the right lumber for the job. Most people will want to pick pine, spruce, or fir for the framing. These types of lumber are affordable and produce sturdy framing for structures. Look for kiln-dried lumber to reduce the risk of shrinkage or insect damage after installation. As part of what’s included in framing a house when you hire a professional, the contractor should order the lumber, so you don’t have to worry about finding the right lumber.

Converting a carport into a garage can vary in difficulty depending on its configuration, the condition of the foundation or slab, and its location relative to the house. The process has a lot in common with a home addition, but you can often skip non-essential finishes like fine flooring, trim work, or even drywall and HVAC. The conversion requires experience with drywall, insulation, and other building materials to ensure it’s done safely and correctly. While it might be possible for a DIYer with the proper tools and skills to do the work, it is a complicated and potentially dangerous job. If you’re new to basic construction, it's best to leave this project to the professionals.