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Measure A House To The Foot, The 1/2 Foot Or Tenths?

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rubberchicken

Sophomore Member
Joined
Apr 27, 2009
Professional Status
Certified Residential Appraiser
State
Colorado
Third time in past month that I've seen a sketch with all measurements rounded to either the full foot or the half foot so I figured I will just ask -- Do you round your measurements?.

I measure a house to the 1/10th of a foot. It's on both my tape measure and my laser and its just as easy to type and write 25.7 into the sketch as 26.0 and I feel the end result is more accurate.
 

timd354

Elite Member
Joined
Jan 11, 2008
Professional Status
Certified Residential Appraiser
State
Maryland
I measure a house to the 1/10th of a foot.
The question is why? You are likely fooling yourself if you really think your measurements are that accurate.

It is likely that there is more than 1/10th of a foot of bow in your tape measure if you pull it across of a 40 or 60 foot run unless you pull that tape measure extremely tight while measuring and also hold that tape measure exactly at the same level above the ground as where you have the dumb end of the tape hooked onto the opposite corner of the house you are measuring. It is also likely that your laser measure is off by more than 1/10th of a foot over the same distance unless you have the laser measuring device mounted on a tripod and you are aiming the laser at a target that is the same distance from the ground as the top of the tripod. (over a 60 foot run, if you point your laser at a target that is 1 foot different in elevation at the other end of that 60 foot span, the error will be 0.09993057 of a foot and that is assuming that your aim is completely square in the horizontal axis (which is not very likely)
 
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residentialguy

Elite Member
Joined
Mar 24, 2009
Professional Status
Certified Residential Appraiser
State
Minnesota
Smaller simple homes, I typically round to the nearest foot. On bigger properties with more corners, I'll round to the nearest 1/2'
Any smaller won't make a difference...and the market certainly doesn't care.

Same with you're adjustments. Round them to $2,500 or higher. (unless you're appraising a dog house) You can't support smaller variances in the market.
 

rubberchicken

Sophomore Member
Joined
Apr 27, 2009
Professional Status
Certified Residential Appraiser
State
Colorado
The question is why? You are likely fooling yourself if you really think your measurements are that accurate.

It is likely than 1/10th of a foot of a bow in your tape measure if you pull it across of a 40 or 60 foot run unless you pull that tape measure extremely tight while measuring and also hold that tape measure exactly at the same level above the ground as where you have the dumb end of the tape hooked onto the opposite corner of the house you are measuring. It is also likely that your laser measure is off by more than 1/10th of a foot over the same distance unless you have the laser measuring device mounted on a tripod and you are aiming the laser at a target that is the same distance from the ground as the top of the tripod. (over a 60 foot run, if you point your laser at a target that is 1 foot different in elevation at the other end of that 60 foot span, the error will be 0.09993057 of a foot and that is assuming that your aim is completely square in the horizontal axis (which is not likely)

Actually, the question is not why? The question is - Do you round your measurements? I was just wondering how many appraisers out there round their measurements. I rarely see it in my market and seeing 3 in the past month is unusual.

And, FWIW, being 0.09993057 of a foot off is still less than being 0.3 feet off.
 

J Grant

Elite Member
Joined
Dec 9, 2003
Professional Status
Certified Residential Appraiser
State
Florida
I round to the nearest foot or half foot.
 
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