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Hillsborough, New Jersey

Real estate information and opinions about residential real estate in Somerset, Hunterdon, Mercer and Middlesex Counties by a REALTOR� with over a quarter century of experience. COMMENTS ARE WELCOME. Please use the Add Comment link at the bottom of the posting.

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Slicing and Dicing Real Estate Pricing - AVMs

Feb. 21, 2006

As I mentioned yesterday (below), pricing is the most important factor in the successful sale of property.  Absorption rates are generally indicative of a general market climate.  However, more than that is necessary to arrive at a market value.  Automatic Value Models (AVMs) are attractive to many people.  A recent introduction, Zillow, is the latest of this phenomenon.  They claim to get within 10% of value of 62% of the homes they have in their database.  So, if your home has a value of $500,000, you have a 62% chance of losing only $50,000, or pricing it $50,000 over the market.  Not an attractive proposition.

 

The flaw in AVMs is that they are often based on tax assessments of surrounding properties.  Occasionally, AVMs have access to Realtors® multiple listing systems.  But, without seeing the interior of a property, it is difficult for a statistics-based system to come up with an accurate price.  Moreover, without seeing the so-called comparable sales, it is virtually impossible to arrive at a value of validity. 

 

Nor do AVMs take into consideration the dynamics of the marketplace.  If interest rates soar, it could be months (or longer) before an AVM reflects the impact on prices.  If a major local employer expands its workforce, it could be months (or longer) before the AVM reflects the change.

 

So whats the answer?  Ill tell you – soon.

User Comments

1. Zillow

Written by: P. Erickson
Feb. 26, 2006
I just had a case where a Washington State REALTOR® was using Zillow to check the price of a home she sold in South Jersey 20 years ago. She asked me to check the MLS to verify Zillow’s price of this home. She did not believe that there could be such a small increase in price from when she sold the home.

As it turns, out her sale was the last time it sold. In doing a quick CMA, without actually going inside the home, similar homes in the neighborhood are being sold for twice the value stated by Zillow. If the CMA estimate would be correct and the owner were to use the Zillow price, the owner would lose $180,000+/-. Not a happy prospect.

Bart Erickson, The HouseJeanie Team, Cinnaminson, NJ

2. Zillow Erred with My Home

Written by: Bonnie Erickson
Mar. 2, 2006
I checked Zillow to price the St. Paul home I purchased 18 months ago. Over $40,000 in renovations have been done since that purchase including new windows and a new roof. Based on my address alone Zillow tells me I have one less bedroom than I do, that the house is worth 12% less than we paid and the basis for this was comparable sales in south Minneapolis . . . not even the same zip code and by far not the same neighborhood! The closest property was 5.8 miles and hundreds of homes away from our home. No compensating factors for our home being a 3 story Victorian compared to a 2 story Sears catalog home, for being on a new foundation with all new mechanicals, for being across the street from a park, etc. If Zillow strikes out this badly on all homes, their AVM system is going to need drastic revision.


Edited by bonnieerickson on March 2, 2006 at 4:32 pm

3. Zillow adjusted my price

Written by: ARDELL DellaLoggia
Apr. 6, 2006
When I posted that Zillow's estimate of the price of my home was under by $200,000 or more, when I next looked they had adjusted it to the price I suggested. Maybe they are "watching" and listening :-)

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