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Determining the Square Footage of a Home

By
Real Estate Sales Representative with W.C. & A.N. Miller Realtors, a Long & Foster Co.

I often asked what the square footage of a home for sale is.  This is a really "gray" area, unfortunately.  Most often, I will quote the square footage stated in the Maryland State Department of Taxation  and Assessments (SDAT) database.  This figure is normally the approximate square footage of the home, NOT including:

  • the basement, whether it's finished or not
  • hallways
  • baths
  • closet space
  • foyers
  • garage space -- even if it has a workshop section to it

SDAT does also include a "livable" finished square footage number for the basement.  I find that many homes have been remodeled and expanded or have finished their basement; and SDAT's numbers often don't reflect that improvement.  I'm guessing it's dependent upon whether or not plans were filed with the county when updates were done.   Either way, you can see that the numbers can be somewhat misleading.

However, be aware that most builders will advertise the square footage of the homes they build as the total square footage as measured by the dimensions of the home times the number of floors PLUS the basement. 

As you can see, there can be a HUGE discrepancy between these two numbers.  The same home in one scenario had an SDAT square footage of 1888 and a builder's advertised square footage of 3100 square feet!  Often people come to my open houses quoting the numbers they found from various sources, not understanding that they are being somewhat mislead.

Appraisers use a different paradigm than these, just to make things even more complicated. 

The bottom line is this:  You can't count on the square footage quote from any source to be completely accurate, since everyone uses a different definition of what space should be included in the total.  Compare room sizes of competing properties to be sure that you're comparing "apples to apples".  Your agent should have a laser measuring tool available which would allow you to quickly measure the rooms yourself, to be sure you're getting what you think you're buying.  Buying a home is a significant investment for most of us.  Protect yourself and don't rely on square footage quotes -- even from the "experts".

Sonja Patterson
Keller Williams - BV - College Station, TX
Texas Monthly 5-Star Realtor Recipient for the Hou

Good article Colleen.  If a seller cannot provide me with a justification for their sq. ftg. estimate...I use the county estimate.  Don't want to get in trouble for errors because "the seller said it was _____".

Sep 18, 2009 07:57 AM
Brian Brumpton
Keller Williams Boise - Boise, ID
Boise Idaho Real Estate

Our contracts state that its up to the buyer and their agent to verify square footage.  I can tell you I've seen some surprising variances when listings go through multiple agents. 

Sep 18, 2009 07:59 AM
Anonymous
Roxanne Navarra

This is a very intersting note.  I wanted to let you know that you if are you using the information in SDAT then there is now a mobile application available.  It is really an interesting tool.

May 08, 2012 07:57 AM
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