How are the values calculated for property on your website?

Asked by j.beckproperties, Wharton, NJ Tue Apr 30, 2013

The original ranch house at 13 East Main Street, Brookside, Mendham Township was gutted, completely renovated and doubled in size to 3046 sq ft in 2007/8. Your picture and details are of the new house but your estimate does not reflect this & is way below even the avg price/sq foot for the area! Happy to send you the before picture if you need to see the difference between the old house and the new one. Please update your estimate.

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Trulia Custo…, Other Pro, San Francisco, CA
Wed May 1, 2013

What are Trulia Estimates?
A Trulia Estimate is just that: an estimate of a home's worth. Our estimates use a ton of info, including recent sales of similar homes and home facts like number of bedrooms and bathrooms, square footage, and more to provide insight into what a home is worth. You can help us improve our accuracy by telling us what you think of your home’s Estimate, and by claiming your home and updating its facts.

Don't see a Trulia Estimate for your home? Don't fret - it doesn't mean it’s not worth anything! Trulia Estimates are only available in locations where we believe our estimate is within a reasonable range of accuracy. Currently, more than 50 million homes across the US have Trulia Estimates, a number that will continue to expand. Check out our coverage and accuracy for homes with Trulia Estimates in available counties across the US.

If you're looking for a precise value for your home, or if you're thinking of selling your home, we recommend you talk to a real estate professional. After all, our algorithms are smart, but we can't know everything about your home’s features and location. Connect with real estate experts in your area.

Trulia Estimates Coverage and Accuracy
Trulia Estimates are available for single-family homes, condos and townhomes in many areas across the US. You can also review the accuracy of Trulia Estimates within each of these counties. We measure accuracy by comparing (1) actual sales prices for recently sold homes over a 3 month period with (2) those homes’ Estimates at the start of that 3-month period. For each county, we report the median error of these differences and the percentage of sales where Trulia Estimates were within 5%, 10% and 20% of the final sale prices.

Frequently Asked Questions

Where does the data come from and how are Trulia Estimates calculated?
Trulia Estimates are based on the physical characteristics of homes like bedrooms, square footage and other features as well as recent sales information for homes in that area. This data is compiled from public records and other sources for counties across the US. Our estimates also incorporate updates from homeowners who claim their homes and enhance the profiles for those homes on Trulia.

Why are Trulia Estimates more accurate in some areas than others?
The amount of data available from public records and other sources varies by county. Accuracy tends to degrade in areas where we have limited data about recent sales of similar homes or basic information about the features of the homes in those areas.

Why are Trulia Estimates not available in all locations?
There are many areas across the country where home facts and recent sales data are limited or not available at all. For example, there are certain “non-disclosure” states, like Texas, that do not disclose sale prices for homes in public records.

If you have additional questions, please contact Trulia Customer Support at

Thank you,
Trulia Customer Service
0 votes
Andrew Tisel…, Agent, clifton, NJ
Wed May 1, 2013
to get true estimate you would need to call in a realtor or appraiser. Trulia estimates do not look at size of a home. They just take an avg of all single family units sold in the area. It would even include condo' townhomes.

What is the purpose of the estimate you need. I'd be glad to help.
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