Ascertaining whether the property you're interested in is a wise investment takes some work. You need to figure what the average house in a given area sells for, as well as what the most desirable houses in that area are like and what they cost.

Some experts suggest that buyers who take this route try to find a "cosmetic fixer" that can be completely refurbished with paint, wallpaper, new floor and window coverings, landscaping and new appliances. You should avoid run-down houses that need major structural repairs. A house price that looks too good to be true probably is. A smart buyer will find out why before buying it.

The basic strategy for a fixer is to find the least desirable house in the most desirable neighborhood, and then decide if the expenses needed to bring the value of that property up to its full potential market value are within one's rehab budget.

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.

The 203(K) loan is usually done as a combination loan to purchase a fixer-upper property "as is" and rehabilitate it, or to refinance a temporary loan to buy the property and do the rehabilitation. It can also be done as a rehabilitation-only loan.

Plans and specifications for the proposed work must be submitted for architectural review and cost estimation. Mortgage proceeds are advanced periodically during the rehabilitation period to finance the construction costs.

For a list of participating lenders, call HUD at (202) 708-2720.

If you are a veteran, loans from the U.S. Department of Veterans Affairs also can be used to buy a home, build a home, improve a home or to refinance an existing loan. VA loans frequently offer lower interest rates than ordinarily available with other kinds of loans. To qualify for a loan, the first step is to apply for a Certificate of Eligibility.

Another program is the Fedeal Housing Administration's Title 1 FHA loan program.

Resources:
* "Rehab a Home With HUD's 203(K)" brochure, U.S. Department of Housing and Urban Development, 7th and D streets S.W., Washington, DC 20410.

All buildings must be issued a building permit and a certificate of occupancy before it can be used. During construction, housing inspectors must make checks at key points. Codes are usually enforced by denying permits, occupancy certificates and by imposing fines.

Building codes also cover most remodeling projects. If you are buying a house that has been significantly remodeled, ask for proof of the permits involved before you purchase to avoid future liability for fines.

Resources:
* "The Ultimate Language of Real Estate," John Reilly, Dearborn Financial Publishing, Chicago; 1993.

The book is available for $9.95 through Consumer Press and Women's Publications, Inc., Dept. SR01, 13326 Southwest 28th St., Fort Lauderdale, FL 33330-1102; (954) 370-9153.

Resources:
* Profiting From Real Estate Rehab, Sandra M. Brassfield, John Wiley & Sons Inc., New York; 1992.
* Remodeling magazine's annual "Cost vs. Value Report", available for a nominal fee from the magazine; call (202) 736-3447 to order a copy.

The tax code does not allow deductions for the demolition or significant alternation of a historic structure.

Resources:
* National Trust for Historic Preservation, Washington, D.C.; (202) 588-6000.

Many experts recommend that buyers find the least desirable house in the best neighborhood and then decide if the expenses needed to bring the value of that property up to its full potential market value are within one's budget. Most experts say inexperienced buyers should avoid run-down houses that need major structural repairs and instead look for properties that only require cosmetic fixes.