Appraisals, Assessments and Zestimates, Oh My!

by Rich Vetstein on October 25, 2010

in Appraisals, Massachusetts Property Values, Realtors

Welcome back Guest Blogger, Gabrielle Daniels Brennan, from Coldwell Banker Residential Brokerage, Sudbury, MA, Check out her fantastic blog, Living In Sudbury (

What Is Your Massachusetts Home Really Worth?

OK folks, you want to know what your house is worth? Stop obsessing over your town assessment and online estimates. At the end of the day, your house is worth what someone is willing to pay for it.

But while you follow the sale prices of your neighbor’s house and e-mail me to ask what your house is worth (sight unseen), I’ll explain to you that it is neither an exact science, a mathematical equation, or a guesstimate. So many factors go into the value of your house. In this case, perception is, for the most part – reality. The location, the condition, the square footage, the updates, the amenities, the lot, the neighborhood, the neighbors, proximity to school, the floorplan – and so much more. Size matters, but it’s not the only thing.

It’s so easy to want to use the two words interchangeably, but please know that an assessment and an appraisal are totally different things.

ASSESSMENTS: (Think – measurement rhymes with assessment) Assessments are based upon the town’s opinion of value of the land and the value of your house, based on the measured square footage and condition (excellent, very good, good, fair and poor). The square footage includes everything in the house – closets, hallways, two-story foyers, stairways, etc. So, although you may add up the square footage from each room, it’s not the same. The taxes you pay are based on your assessment. Years ago, houses were priced close to, or above, their assessed value. If a house were priced below the assessment, it was featured as a fabulous thing. Priced WAY BELOW assessment, translated, meant: “Don’t forget your checkbook as you’re running like a madman to the open house.”

These days, assessments may be in the general vicinity of the asking price. Not a lot of weight is placed on the assessed value as it compares to the true market value. Most are priced around the assessed value, especially if they sold in the past 10 years.  The assessor’s office does not take into account all of the items within a house that a buyer perceives as valuable (age of systems, paint vs. 1970s wallpaper, neighborhood full of kids the same age, master bathroom rivaling the one at the Four Seasons in Nevis, etc.) Just the square footage, value of the land and the town’s rating of the neighborhood.

APPRAISALS: An appraisal is a valuation made mathematically by a real estate appraiser for the purposes of providing security to the lending institution. The bank wants to be sure that the money it is loaning – for a refinance, home equity loan, line of credit or a purchase – can be recouped in today’s market if the owner defaults on the loan. Essentially, they need to know that they would not have a problem selling the house for the amount borrowed.

The appraiser formulates his/her appraisal based on the sale prices of the houses nearby that would be comparable for the square footage, the amenities, and the condition. In some towns, it’s not necessarily apples to apples, because a house down the street may have been foreclosed upon, thus skewing the value of the subject property.

Appraisals used to be more of a formality, and now they are extremely strict. As a result of the mortgage debacle, banks have cracked down and the rules have changed. Banks used to be able to communicate with the appraisers – now they have been prohibited from having direct communication. If you have recently refinanced and your appraisal came in at one price, it doesn’t necessarily mean that that price is what you would get from a buyer if your house went on the market.

ZESTIMATES: I think Zillow is an entertaining and somewhat informative website. It is a great site to search for homes and to take advantage of all of the interactive features. The “Zestimate” is’s term for “estimate of the value of your house.” For houses in Middlesex County, Zillow states that its accuracy is 99 % of the homes in Middlesex County that are on Zillow. Ninety-nine percent of homes in Sudbury are on Zillow. Ninety-nine percent of those have “Zestimates.” Of that 99%, only 32% sold within 5% of their Zestimate. Fifty-eight percent sold within 10% of its Zestimate and 82% sold within 20% of its Zestimate. Median error is 8.3%.

Dizzy? This means that if your Zestimate is $800,000, your sale price may be closer to $640,000 or $960,000. It’s a pretty big spread! So, fun site – yes. Accurate – not really. Why? The information pulled by Zillow is information that is available online – and if one piece of data is incorrect (it happens all the time) then everything is skewed.

Zillow does not know what streets are busy, what houses have just updated their kitchen and bathrooms, furnaces, roofs, etc. Zillow also does not know the motivation of sellers. So, if your neighbors won the lottery and just wanted to sell the house so they could sail around the world and sold for about $50K less than they could have – according to Zillow, your house just went down $50K, also.

Unless he or she has a really good sense of humor, please don’t tell your real estate agent that you disagree with his/her extensive analysis because your “Zestimate” states “X.” It would be like telling Todd English that you know how to make his signature dish because you just Googled the recipe. So, enjoy the site, have fun searching, reading the real estate news, etc., but don’t get excited or freak out because of your Zestimate. It will likely change the next time you log on.

COMPARATIVE MARKET ANALYSIS: This is the best, and most accurate, way to know the value of your house. A comparative market analysis is written by a real estate agent. It would best completed by an agent who knows the market, knows each house that your’s would be compared to, and has his/her hand on the pulse of the buyers. A real estate agent preparing the market analysis should take into account everything about your house – the square footage, the condition, the style, the location, the demographic of the potential buyers, the market conditions, the intangibles, and the perceived value within the town.

We then analyze the house in comparison with the houses that are on the market, have accepted offers, are under agreement and have sold (closed). A market analysis conducted today would not include sales from the spring as it was a different market. It’s also very important to have a sense of what comparables appraisers will use when appraising the house for the buyer’s mortgage company.

So, assessments (pain in the assessment = taxes), appraisals (think = approximate), Zestimates (, market analysis (call me/real estate agent).

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