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

House framing can be expensive because the materials are pricey, and the job requires a high level of expertise. The more complex the plans, the more expensive the job, but even the most basic frame needs to be installed with high-quality materials and precision. When pricing your home’s framework, remember that a sturdy frame is necessary to create a safe structure.

Yes, you can find ceiling joists using simple tools if a stud finder isn't available.

Using a hammer requires patience and a keen ear. Gently tap the ceiling in a grid pattern, listening for sound changes. A hollow sound indicates space between joists, while a solid, dull thud suggests a joist. Mark the location with a pencil and confirm by tapping from different angles.

Alternatively, you can use a nail, but this method will leave small holes. You'll feel increased resistance when the nail hits a joist. Mark the spot and repeat the process every 16 or 24 inches to map the joist locations. This method is considered less reliable than using a stud finder.

Yes, you will need a jack for a rim joist replacement. To prevent sagging and facilitate the removal of load-bearing wood, you’ll need to relieve the pressure from this joint before beginning work. 

Due to hydraulics and other specialized equipment, a sill plate and rim joist replacement are not typically a DIY project. Hiring a professional structural engineer and experienced contractors is the best approach to replacing rotted sill plates and rim joists.