How Realtors Determine What a Home Is Worth

When a real estate agent tells you what your home is worth, that number comes from a specific process, not intuition and not from an algorithm. Understanding that process helps you evaluate pricing conversations with confidence.

The Foundation: The Comparative Market Analysis

The primary tool agents use is the Comparative Market Analysis, or CMA. A CMA is a detailed analysis of similar homes that have recently sold in your area, and it's the closest thing to a professional appraisal that doesn't require a licensed appraiser.

The agent pulls data directly from the MLS, not from public real estate sites, which can be incomplete or delayed. The MLS contains actual sale prices, days on market, property details, and market history that shapes a complete picture.

Selecting Comparable Sales

The first task is identifying appropriate comparable sales, called "comps." These are homes that have sold recently (typically within the last 90 days, though this window may extend in slower markets) and are similar to the subject property in key ways:

• Location, ideally within the same neighborhood or subdivision
• Size, with similar square footage
• Age and construction type
• Bedroom and bathroom count
• General condition and level of updates
• Lot characteristics where relevant

Finding truly identical comps is rare. The value in the CMA process comes from the agent's ability to identify the most relevant comparisons and make thoughtful adjustments for the differences.

Making Adjustments

No two homes are the same. Once comps are selected, the agent adjusts their values to account for differences from the subject property. If a comp home has an updated kitchen and yours doesn't, the comp's value is adjusted down. If your home has a finished basement and the comp doesn't, the comp's value is adjusted up.

These adjustments require judgment informed by market data, specifically what buyers have actually paid for these features in this area. This is where local knowledge matters more than a national algorithm can capture.

Reading the Market, Not Just the Data

A competent CMA doesn't just crunch numbers from sold listings. It also considers:

• Absorption rate: how quickly homes are selling relative to supply. A low-inventory, fast-moving market requires different pricing than one where homes sit for weeks.
• Active listings: your competition. Buyers will compare your home to others currently on the market; understanding the competitive landscape informs pricing strategy.
• Expired and withdrawn listings: homes that failed to sell often failed because they were overpriced. This context matters.
• Recent trends: is the market accelerating, decelerating, or stable? Timing the CMA to current conditions, not data from 6 months ago, produces a more accurate result.

Why Automated Estimates Fall Short

Online valuation tools use algorithms to estimate value, and they can be a useful first reference. But they can't see inside a home, don't know about recent renovations, can't assess condition, and may use data that lags the actual market by weeks or months.

A CMA from a local agent who has actually walked comparable homes and tracks daily market movement provides a more reliable basis for pricing decisions.

What the CMA Produces

A well-prepared CMA doesn't produce a single exact number. It produces a value range. The range reflects the uncertainty inherent in valuing real property: comparable homes aren't identical, buyer preferences vary, and market conditions shift. Within that range, the agent will help you choose a list price based on your goals and timeline.

A seller who needs to move quickly might price at the lower end of the range to attract immediate offers. A seller with flexibility might price at the upper end and see if the market responds. The CMA is the analytical foundation for that conversation.