Using Data Science to help Real Estate investors

Varun Khilnani
INST414: Data Science Techniques
3 min readSep 14, 2024

In the competitive world of real estate, the challenge of pricing a property effectively is a question that resonates with homeowners, real estate agents, and investors alike. The main question here is: “What is the optimal selling price for a house based on its various attributes?” This question is crucial for those looking to make informed decisions about property investments and sales.

To answer this question, a comprehensive dataset is needed, encompassing a wide range of property attributes and their corresponding selling prices. Attributes include not just basic details like square feet, year built, zip code, and schooling district, but also a multitude of other factors that can influence a property’s value. These may include amenities such as swimming pools, garages, energy efficiency features, neighborhood safety ratings, proximity to parks and public transport, and even aesthetic qualities like architectural style and interior design.

To gather such detailed data, we can use a combination of official property records and web scraping techniques. For example, Montgomery County real estate records offer a wealth of information about hundreds of property attributes. However, to ensure the dataset is current and comprehensive, web scraping tools can be employed. Using Python libraries such as requests and BeautifulSoup, we can extract up-to-date details from websites like Zillow and Redfin. These tools allow us to fetch real-time data on various property features and estimated market values.

Once the data is collected, the next step involves performing exploratory data analysis. This process begins with preparing the data, which includes handling any missing values and correcting anomalies. For instance, properties with incomplete information or erroneous values must be addressed to maintain the dataset’s integrity. Following this, we train a gradient dissent model using the collected data. This model utilizes numerous property attributes as inputs to predict the optimal selling price. By examining the performance of the model and the importance of different features, we can distinguish which factors most significantly impact property prices and predict the future price of properties.

Data visualization plays a crucial role in this analysis. Scatter plots and correlation matrices help illustrate the relationships between various property attributes and their selling prices. These visual tools provide insights into trends and patterns, aiding in the determination of the optimal price point for different types of properties.

Despite the thoroughness of this analysis, several limitations must be acknowledged. The accuracy of web-scraped data can vary, and Zestimate values from platforms like Zillow are not always perfect. Additionally, the real estate market can differ greatly across regions, which may limit the model’s applicability to specific areas. Temporal factors also play a role, as market conditions can fluctuate over time, potentially affecting the relevance of historical data.

In conclusion, determining the ideal selling price for a house involves a complex approach that considers a broad range of property attributes and market conditions. By using advanced data collection and modeling techniques, real estate professionals can gain valuable insights into pricing strategies. However, it is essential to remain mindful of the data’s limitations and potential biases to ensure the accuracy and applicability of the findings.

This is an example of the capabilities of the model. This GUI is limited to input only 5 factors, but with more work done, it can easily implement 100+.

https://github.com/vkhil/Module1

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