CAD tip # 11982:

You can download the add-on app from Download. Load it with APPLOAD and start it by typing the AREATAB command. First create a table with at least two columns in your drawing (one preformatted row is enough).

The command usage is illustrated in the sample video:

You can use any text or any block with attributes as the parcel identification (number, label). But it must be placed inside the parcel/room. The enclosed area is detected automatically (no need to have it enclosed with a single entity).

The subsequently picked parcel numbers (and their areas) are written to new rows in the picked table (under the picked row, pick the first column). If the picked row (cell) contains empty space or the same parcel number (or the Overwrite option was used), it will be overwritten. Otherwise a new row will be inserted under the picked row and the current parcel (room, etc.) data will be filled in.

You can format the area label through the following LISP variables:

(setq _AreaTabPrefix "")
(setq _AreaTabSuffix " m\\U+00B2") ; m2
(setq _AreaTabDecimals 1)
(setq _AreaTabRatio 1.0)