Market value is what price the house will bring at a given point in time. A comparative market analysis is an informal estimate of market value, based on sales of comparable properties, performed by a real estate agent or broker.

The greatest rise in home prices occurs when the economy is strong and the number of home sales is increasing.

Though markets vary, that has occurred twice in recent history -- in the early 1970s and the late 1980s. However, single-family homes appreciated much more than condominiums. While overall market conditions are out of the homeowner's control, other factors are not.

For example, specific home improvements can increase the value above the cost of the improvements. According to Remodeling magazine, which publishes an annual "Cost vs. Value" remodeling report, a remodeled bathroom returns 81percent to the owner, a bathroom addition, 89 percent and a master bedroom suite, 82 percent.

Remember, quality pays. Well-planned and well-executed remodeling jobs are a good investment while bad work seldom enhances value or livability.

If you live in a high-crime area, an organized community watch program not only will lower the crime rate but also have been known to enhance property values.

Your real estate agent will be happy to provide a comparative market analysis, an informal estimate of value based on comparable sales in the neighborhood. You also can research "the comps" yourself by checking on recent sales in public records. Be sure that you are researching properties that are similar in size, construction and location.

This information is not only available at your local recorder's or assessor's office but also through private companies and on the Internet.

An appraisal, which generally cost $200 to $300 to perform, is a certified appraiser's opinion of the value of a home at any given time. Appraisers review numerous factors including recent comparable sales, location, square footage and construction quality.

The greatest rise in home prices occurs when the economy is strong and the number of home sales is increasing. Though markets vary, that has occurred twice in recent history -- in the early 1970s and the late 1980s.

Specific home improvements can increase the value above the cost of the improvements. According to Remodeling magazine, which publishes an annual "Cost vs. Value" remodeling report, a remodeled bathroom returns 81percent to the owner, a bathroom addition, 89 percent and a master bedroom suite, 82 percent. Remember, quality pays. Well-planned and well-executed remodeling jobs are a good investment while bad work seldom enhances value or livability.

The safety and security of a neighborhood can affect property values, too. If you live in a high-crime area, an organized community watch program not only will lower the crime rate but give home values a boost, too.

Ultimately, the decision should be based on individual needs, the extent of work involved and what will add the most value.

Most recently, the highest remodeling paybacks have come from updating kitchens and baths, home-office additions and extra amenities in older homes. While home offices are a relatively new remodeling trend, for example, you could expect to recoup 58 percent of the cost of adding a home office, according to the survey.

For overall housing statistics, U.S. Housing Markets regularly publishes quarterly reports on home building and home buying. Your local builders association probably gets this report. If not, the housing research firm is located in Canton, Mich.; call (800) 755-6269 for information; the firm also maintains an Internet site. Finally, check with the U.S. Bureau of the Census in Washington, D.C.; (301) 495-4700. The census bureau also maintains a site on the Internet. The Chicago Title company also has published a pamphlet, "Who's Buying Homes in America." Write Chicago Title and Trust Family of Title Insurers, 171 North Clark St., Chicago, IL 60601-3294.