In Wellesley last year, one piece of paperwork was worth more than a kitchen renovation.

It has nothing to do with kitchen countertops.

Ashley Liddle, Seniors Real Estate Specialist® with Douglas Elliman, on the one task that pays for itself before you list.

If you have owned your Wellesley home for twenty-five years or more, you are about to be surprised twice. Once by what the house is worth. And once by what the IRS thinks you owe on the difference.

Wellesley's median single-family sale price reached $2,210,652 in 2025. For a homeowner who bought in the 1980s or 1990s, that number can mean a substantial capital gain, and the federal exclusion of $250,000 (or $500,000 for a married couple) rarely covers all of it.

But the gain is not measured against the price you paid alone. It is measured against your basis: the purchase price, plus every capital improvement made since. A 1996 kitchen. A 2004 addition. A new roof. Replacement windows.

Each one lowers the tax. Most homeowners have forgotten most of them.

We have seen this add up to six figures in a single home. That is money that simply disappears if the receipts were never kept, or were kept in a box in the basement instead of a folder a CPA can use.

This is not a task for the week before closing. It is the one thing on a downsizing timeline that cannot be compressed, because nobody can reconstruct forty years of your own home's history but you.

Start the folder today. It costs nothing, and it may be the single most valuable hour you spend before you sell.

This is one of nine decisions covered in The Wellesley Downsizing Guide, a free resource for homeowners considering a move after decades in the same house. It is not a sales brochure. It is the same guidance Ashley gives her own clients, in the order it usually matters.

The Wellesley Downsizing Guide, a free resource for homeowners thinking through a move after decades in the same house — covering timing, belongings, tax relief, estate planning, and a realistic 12-month timeline.