Add between $75 and $500 to your budget for the cost of outlet installation. Most garages have electricity of some sort, even if it's just a bare bulb in the ceiling and a few outlets spaced around the walls. If you're trying to convert your garage into living space, you'll need a nearby licensed electrician to add more wiring and outlets for additional electrical devices.
Leaky doors and windows let in uncomfortable drafts and increase heating and cooling costs. Check your garage service door to be sure it has good weather stripping and a threshold that seals tightly to the bottom of the door. In most cases, if your service door is missing a threshold and weather stripping, it’s more efficient to replace the door with a new, weather-tight version. You can buy an inexpensive prehung metal exterior door at home centers and lumberyards.
There are a remarkable number of garage options that vary widely in design and price. If your doors could use a functional and aesthetic upgrade, consider budgeting for replacements that include enough extras that they help boost your curb appeal. These pretty doors include old-style pulls as well as small windowpanes, all painted in a color to blend with the rest of the home.
When considering a small garage remodel, you can pay as little as $2,500 to as much as $30,000.  On average, the cost will be around $11,000, if you consider the national average. These costs are not set in stone, though. Your choices on materials will largely determine the overall cost. Your budget will take less of a hit on a smaller garage, which is another bonus, and there are many ways to save. A breakdown of the costs follows.
For those searching for more room when you decide to remodel two spaces come quickly to mind. These are your garage and your attic. Both have benefits and drawbacks as far as conversion to a bedroom or usable space goes. It is a bit more easily converted than your attic and can result in a beautiful living space. Before you begin work you should know the real garage remodeling costs involved. Converting your garage to a bedroom requires certain elements that are not necessary for a family room. When converting your garage to a bedroom you will need to have a window that serves as a secondary escape route, and a closet. There are additional requirements by code, but these are the main ones to consider. 
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