Slideshow: The Real Cost of Home Improvement

By Ben Steverman - 2012-11-26T19:03:24Z

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Garage or Carport

Average cost: $13,059

Married couples are 30 percent more likely to add or renovate a garage or carport than single people. Garage upgrades cost the most in the northeastern U.S., at $15,900, and the least in the South, at $10,800.

Adding a new garage recoups 57 percent, while replacing a garage door can recover 72 percent of its cost. Garage door openers should last 10 to 15 years, according to the NAHB.