Energy Efficient Homes By Amy Hoak   Energy Efficiency Homes & Curb Appeal According to Remodeling Magazine's 2008-2009 Cost vs. Value report, replacement projects that improve curb appeal -- including siding, windows and decks -- are some of your best bets for recouping money at resale. Upgrading windows also can make a home more energy efficient. ServiceMagic has seen more interest in projects including insulation and solar-panel installation, which cut energy bills and are likely eligible for government tax credits, according to the company's report. And some homeowners are investing in home energy audits, for a comprehensive view of what can be done to increase efficiency, Mr. Smith says. The cost: between $300 and $500. "But people will pay that because the insight provided can save them a lot of money down the road," he says. An audit can help homeowners select projects. By completing tasks such as sealing up attics and crawlspaces, installing better insulation and tuning up air-conditioning systems, homes in Southern California that took 60 to 80 cents per square foot to heat or cool could cost 10 to 20 cents per square foot after improvements are made, says Mr. Judson, the California architect. Hot Tubs and TVs Most home-improvement projects may be practical these days, but some splurges are also becoming popular as market conditions force people to stay in a home longer than previously planned and as the economy has them spending more time entertaining at home. As a result, some homeowners are buying hot tubs, spas and saunas, as well as TVs and other home-theater components, Mr. Smith says. Compared to large-scale remodeling projects, "hot tubs are not a massive out-of-pocket expense," Mr. Smith says. And "with the prices of flat-screen TVs coming down and the whole 'staycation' phenomenon," updated media rooms also have appeal. Return to part 1 Write to Amy Hoak at amy.hoak@dowjones.com   Tags: