DEAR MR. MELTZER: My husband has been transferred to a town that is totally unfamiliar to both of us. We know nobody there. In fact, neither of us has ever been there before.

We have three children of school age and we're going to need a house. Shall we go there and drive up and down the streets looking for "For Sale" signs? Shall we look in the newspapers?

ANSWER: Buying a house is avery big move. It's expensive monitarily and emotionally.

There are many legitimate, professional brokers who will be delighted to help you find you house. Seek out brokers in the area where you intend to move, of course.

If you drive up and down the streets, you'll be wasting time. Many sellers do not display "For Sale" signs.

Look at the adverstisements in the local newspapers. Remember, in a good area demand far exceeds the supply of houses for sale.

DEAR MR. MELTZER: My new husband and I moved into our very first apartment. Our two sets of parents gave us most of the furniture as a wedding gift, which included new wall-to-wall carpeting.

Well, the carpeting people laid the carpet, but now the front door rubs. In fact it's almost impossible to open and close it over the high piled carpeting.

The miserable people who run the building refuse to help us. We asked if a maintenance man could come and rub down the door, or whatever is necessary, to make it open and close easily. The manager says it's our problem.

My husband's pretty good with a tool in his hand. Tf you can tell us how to correct this problem, I'm sure be can do it.

ANSWER: Usually the people who install the carpeting remove the door. Maybe you'll have to take the door down again and trim it yourselves.

Depending on the height or pile of the carpet, you may have to trim as much as one inch from the bottom of the door. Measure the distance between the lower edge of the half hinge on the door frame and the carpeting, minus one-quarter inch.

Mark off this distance with a pencil, measuring from the lower edge of the half hinge to the bottom of the door. Make another pencil mark on the other side of the door at that point. A line between both marks will serve as a cutting guide.

After removing the door, plane th bottom edge from each side toward the center. If you need to remove more than one-quarter inch, then saw it off. After sawing, plane a few thin shavings from the bottom. Sandpaper lightly before rehanging tthe door.

Bernard C. Meltzer is a realtor, engineer and appraiser. His address: Suite 900, 112 S. 16th St., Philadelphia 19102.