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.
The cost to finish a garage is often less than the cost of a remodel, coming in at an average of about $5,000. Finishes should factor high on your list of materials before you ever begin your garage conversion. The answers to the following questions will go far in determining your budget. Low-end finishes will save you big bucks at the time of renovation, but high-end finishes will help recoup your ROI when it comes time to sell.
Waterproof paint (for concrete walls) • Paint (dry wall) • Behr concrete cleaner (2 Gal) • Behr Concrete Etcher (2 Gal) • Behr Concrete Bonding Primer (1 Gal) • Behr 1-Part Epoxy Paint (2 Gal.) • MiscPainting Supplies • Stainless steel light switch/receptical covers • Lumber for cabinet over circuit breakers • Gladiator Garage Works workbench-Wall cabinets-tall cabinet • Hooks for bicycles/tools • Tapcon masonary drill bits • PVC (to run wires for garage door openers
Before you install the drywall, temporarily remove the brackets that support the garage door tracks and opener. This will make it easier to install the 4-mil poly and ceiling drywall and will result in a neater-looking job. Start by carefully measuring and recording the position of the tracks and opener. Measure from the nearest wall and from the floor. Then close the garage door, lock it closed and unplug the opener to disable it. Unscrew or unbolt the brackets that support the garage door tracks and remove them. Also remove the garage door opener brackets and support the opener on a ladder. It may be easier to entirely disconnect the opener and set it aside. Reinstall the garage door track brackets using a new section of angle iron on the ceiling. Attach each new ceiling angle iron with four 5/16-in. x 3-in. lag screws driven into the center of the ceiling joist or into wood blocking that’s screwed to the adjacent ceiling framing.
For a garage-to-utility-room conversion, budget at least $6,000 for appliances, a utility sink, and space for sorting, folding and hanging laundry. A new utility room in place of an old garage brings convenience into your life, especially if you've spent years dragging loads of laundry up and down the stairs. This conversion will cost a bit more due to the addition of plumbing, but it'll be worth it.
Larger projects might entail hiring an architect or structural engineer. If you're having trouble deciding on the specifics of a garage remodel, consider hiring an interior designer. Costs for these professionals vary depending on their experience and level of involvement in the project; you could pay a few hundred dollars for a one-time consultation or several thousand dollars for beginning to end involvement.
If the concrete slab in the garage is the problem, there are more cost-effective solutions than a concrete mason. Most cracking, flaking, stains, pitting or wear can be easily fixed by calling a concrete specialist to apply either an inexpensive epoxy or polyurethane-based coating. These seals are very durable and can make your garage floor look brand new. 
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