Should I Trust Zillow to Determine My House Value in Chicagoland and Illinois


According to Zillow, the Zestimate provided for any house, including yours, is quite accurate. Zillow reports a nationwide median error rate of 2.4% for properties currently on the market, and a median error rate of 7.49% for properties that are off-market.

Should I Trust Zillow to Determine My House Value in Chicagoland and Illinois?

As a homeowner in Chicagoland and Illinois, you may be considering selling your house and wondering how much it’s worth. One popular method for determining a home’s value is by using Zillow’s Zestimate tool. But can you trust Zillow to accurately determine your house value? In this blog post, we’ll explore the accuracy of Zillow’s Zestimate tool and discuss alternative methods for determining your home’s value. We’ll also provide some tips on how to sell your house fast in Chicagoland and Illinois.

What is Zillow’s Zestimate?

Zillow’s Zestimate is an online tool that provides an estimated market value for a specific property. It uses a proprietary algorithm that takes into account various factors, such as the property’s physical characteristics, location, and market conditions. The Zestimate is updated regularly as new data becomes available, and it is intended to be a starting point for homeowners and potential buyers to determine a home’s value.

How Accurate is Zillow’s Zestimate?

According to Zillow, the Zestimate has a median error rate of 1.9% for on-market homes and 7.5% for off-market homes. This means that half of the Zestimates for on-market homes are within 1.9% of the actual selling price, while half of the Zestimates for off-market homes are within 7.5% of the actual selling price. While these error rates may seem relatively low, they can still translate to significant discrepancies in the estimated value of a home.

For example, let’s say you have a home in Chicagoland with an estimated value of $300,000. A 1.9% error rate for an on-market home would mean that the Zestimate could be off by as much as $5,700. For an off-market home with a 7.5% error rate, the Zestimate could be off by as much as $22,500. These discrepancies can have a significant impact on your decision-making process when it comes to selling your home.

Factors That Can Affect the Accuracy of Zillow’s Zestimate

There are several factors that can affect the accuracy of Zillow’s Zestimate, including:

1. Limited Data

Zillow’s algorithm relies on data from public records and user-submitted information. In some areas, public records may be incomplete or outdated, which can lead to inaccuracies in the Zestimate. Additionally, user-submitted information can be prone to errors, as homeowners may not accurately report the details of their property.

2. Unique Properties

Zillow’s algorithm may struggle to accurately estimate the value of unique properties, such as historic homes or properties with unusual features. This is because the algorithm relies on comparable sales data, which may not be available for unique properties.

3. Market Fluctuations

The real estate market can be volatile, with property values fluctuating due to factors such as changes in the local economy, interest rates, and housing demand. Zillow’s algorithm may not be able to keep up with these rapid changes, leading to inaccuracies in the Zestimate.

4. Home Improvements

Zillow’s algorithm may not take into account recent home improvements, such as a new roof or updated kitchen, which can significantly impact a home’s value. This can lead to an inaccurate Zestimate that does not reflect the true value of the property.

Alternative Methods for Determining Your Home’s Value

Given the potential inaccuracies of Zillow’s Zestimate, it’s important to consider alternative methods for determining your home’s value. Some options include:

1. Comparative Market Analysis (CMA)

A comparative market analysis (CMA) is a report prepared by a real estate agent that compares your home to similar properties that have recently sold in your area. This can give you a more accurate idea of your home’s value based on current market conditions. To get a CMA, you can contact a local real estate agent who will gather the necessary data and prepare the report for you.

2. Professional Appraisal

A professional appraisal is an in-depth evaluation of your home’s value conducted by a licensed appraiser. The appraiser will consider factors such as the property’s location, size, condition, and any recent improvements. While an appraisal can be more expensive than a CMA, it is generally considered to be the most accurate method for determining a home’s value.

3. Online Home Value Estimators

In addition to Zillow’s Zestimate, there are several other online home value estimators available, such as Redfin’s Estimate and’s Home Value tool. While these tools may also have their limitations, they can provide additional data points to help you determine your home’s value.

Tips for Selling Your House Fast in Chicagoland and Illinois

If you’re looking to sell your house fast in Illinois, consider the following tips:

1. Price Your Home Competitively

Setting the right price for your home is crucial for attracting potential buyers and selling quickly. Be sure to consider the current market conditions and the value of comparable properties in your area when determining your asking price.

2. Make Necessary Repairs and Updates

Before listing your home, make any necessary repairs and updates to ensure that your property is in good condition. This can help attract more potential buyers and increase the likelihood of a quick sale.

3. Stage Your Home

Staging your home can make it more appealing to potential buyers by showcasing its best features and making it feel more inviting. Consider decluttering, rearranging furniture, and adding decorative touches to create a welcoming atmosphere.

4. Market Your Home Effectively

Work with a real estate agent who has experience in your local market and can help you effectively market your home. This may include professional photography, online listings, and open houses.

5. Be Flexible with Showings and Offers

Be prepared to accommodate potential buyers by being flexible with showings and open to negotiating offers. This can help increase the chances of a quick sale.


While Zillow’s Zestimate can provide a helpful starting point for determining your home’s value, it’s important to consider its potential inaccuracies and explore alternative methods for determining your home’s value. By working with a real estate professional and following the tips outlined above, you can increase your chances of selling your house fast in Chicagoland and Illinois.