The most reliable way to find your home's value is a professional appraisal, but you can get a rough estimate for free using online tools, recent sales of similar homes nearby, or a real estate agent's opinion
Your home's value depends on what a buyer would actually pay for it right now, not what you paid for it or what you think it should be worth. That number changes with the market, the condition of your house, and what similar homes in your area have sold for recently. If you need the value for a mortgage, refinance, or property tax appeal, a licensed appraiser is the standard — but if you just want to know roughly what you have, there are several free or low-cost starting points.
The method you choose depends on why you need the number. A lender will not accept an online estimate; they require a formal appraisal. But if you are checking your net worth, planning a renovation budget, or deciding whether to sell, a free estimate is often enough to start.
Key Takeaways
- A professional appraisal from a licensed appraiser is the only valuation a lender will accept, and typically costs $300 to $500.
- Online home value tools like Zillow, Redfin, and county assessor websites give free estimates but can be off by 5 to 20 percent depending on how recent the comparable sales data is.
- Recent sales prices of similar homes (same size, condition, location) in your neighborhood are the most reliable free data point you can find yourself.
- A real estate agent's comparative market analysis (CMA) is free and based on actual local sales, but the agent has a financial interest in the number they give you.
- Your county assessor's value is used for property taxes, not market value, and is often lower than what your home would sell for.
Professional appraisals: what lenders require
If you are refinancing a mortgage, taking out a home equity loan, or selling through a traditional lender, you will need a formal appraisal from a licensed appraiser. The lender orders and pays for it (though the cost is usually rolled into your closing costs or loan fees). The appraiser inspects the interior and exterior, measures square footage, checks the roof and foundation, and compares your home to recent sales of similar properties in the area.
An appraisal typically costs $300 to $500 for a single-family home, though it can be higher in rural areas or for unusual properties. The process takes one to two weeks from order to report. The appraiser's job is to estimate fair market value — what a willing buyer would pay a willing seller — not to determine what you should list it for or what you paid for it.
If you disagree with an appraisal, you can request a reconsideration, but the appraiser must have a documented reason to change it (such as a data error or a comparable sale they missed). Simply disagreeing with the number is not enough.
Free online home value tools
Websites like Zillow, Redfin, Trulia, and Realtor.com offer free home value estimates called automated valuation models (AVMs). These tools pull public records, recent sales, property characteristics, and market trends to generate a number in seconds. They are convenient and free, but they are estimates, not appraisals.
The accuracy of an AVM depends on how much recent sales data exists in your area. In a neighborhood with frequent sales and consistent home types, an AVM might be within 5 to 10 percent of actual value. In rural areas, new subdivisions, or neighborhoods with few recent sales, the estimate can be off by 20 percent or more. The tools update as new sales data comes in, so checking the same home a few months apart may give you different numbers.
These estimates are useful for a quick sense of your home's ballpark value, but do not rely on them for major financial decisions. Use them as a starting point, then cross-check with other methods.
Comparable sales in your neighborhood
The most reliable free data you can find yourself is what similar homes have actually sold for recently. Look for homes that are the same size (within 500 square feet), similar age, similar condition, and in the same neighborhood or within a few blocks. Sales that closed in the last three to six months are most relevant; older sales matter less as the market changes.
You can find recent sales through your county assessor's website (search by address or parcel number), Zillow's sold listings, Redfin's sold history, or your local multiple listing service (MLS) if you have access. Most county assessor sites are free and public; you can see the sale price, sale date, and basic property details for any home in the county.
If you find three to five homes that are genuinely comparable and sold recently, you can average their prices or adjust for differences (for example, if a comparable sold for $350,000 but has an extra bedroom, you might subtract $20,000 to $30,000 from that number). This method is more work than an online tool, but it is based on real transactions in your actual market.
Real estate agent comparative market analysis
A real estate agent can prepare a comparative market analysis (CMA) for free. The agent pulls recent sales of comparable homes, lists homes currently for sale, and homes that were listed but did not sell. They use this data to suggest a listing price or estimated value.
A CMA is more detailed than an online estimate because it is based on an agent's local knowledge and access to MLS data. However, remember that the agent has a financial incentive in the number — if you are selling, they want the price high enough to attract buyers but not so high that the home sits on the market. If you are refinancing, they have no direct stake, so the analysis may be more neutral.
Get CMAs from two or three agents if possible. If the numbers are similar, you have a solid range. If they vary widely, ask each agent to explain their reasoning — the differences often reveal which comparable sales they weighted most heavily.
County assessor values and property tax records
Your county assessor assigns a value to your home for property tax purposes. This value is public record and you can find it on your county assessor's website by searching your address or parcel number. The assessor's value is usually lower than market value because it is based on a formula, not recent sales, and because many states cap how much the assessed value can increase each year.
Do not use the assessor's value as your home's market value. It is useful for understanding your property tax bill, but it does not reflect what your home would sell for. If you think your assessed value is wrong (for example, if it has not been updated in years), you can file an appeal with your assessor's office, usually before a deadline in spring or early summer.
When to use each method
| Reason You Need the Value | Best Method | Why |
|---|---|---|
| Refinancing or home equity loan | Professional appraisal (required by lender) | Lenders will not accept estimates; they need a licensed appraiser's report. |
| Selling your home | Comparable sales + agent CMA | Real transactions in your market are most relevant; agent knows local conditions. |
| Checking net worth or insurance | Online tool + comparable sales | Quick estimate is enough; cross-check with one or two comparable sales. |
| Property tax appeal | Comparable sales + recent appraisals | Assessor's office wants to see what similar homes sold for and what appraisers found. |
| Estate planning or divorce | Professional appraisal | Courts and attorneys often require a formal appraisal for legal accuracy. |
What affects your home's value
Your home's value is not fixed. It changes based on the local market (interest rates, inventory, demand), the condition of the house (roof age, foundation issues, updates), and location factors (school district, proximity to jobs, neighborhood trends). A home that was worth $300,000 two years ago might be worth $320,000 today or $280,000 depending on these factors.
Major renovations (kitchen, bathroom, roof replacement) can increase value, but not dollar-for-dollar. A $50,000 kitchen renovation might add $30,000 to $40,000 to your home's value, depending on the market and the quality of the work. Deferred maintenance (a failing roof, foundation cracks, outdated electrical) decreases value.
If you are planning a major expense or considering selling, it is worth getting a current estimate every year or two. Markets move, and your home's value with it.
Frequently Asked Questions
How accurate are online home value estimates?
Online estimates are typically within 5 to 20 percent of actual value, depending on how much recent sales data exists in your area. In active markets with frequent sales, they are usually more accurate. In rural areas or neighborhoods with few recent transactions, they can be significantly off. Use them as a starting point, not a final answer.
Can I use an online estimate for a mortgage or refinance?
No. Lenders require a formal appraisal from a licensed appraiser. Online estimates are not acceptable for any loan decision. If you are refinancing, the lender will order the appraisal for you.
What if my home's value dropped since I bought it?
Home values fluctuate with the market. If you are underwater (owe more than the home is worth), you have limited options: wait for the market to recover, make improvements to increase value, or explore loan modification programs if you are struggling with payments. Consult a mortgage professional about your specific situation.
How often should I check my home's value?
If you are not planning to sell or refinance, checking once a year is reasonable. If the market is moving quickly or you are planning a major financial decision, check every few months. Online tools update as new sales data comes in, so the number may change between checks.
Is my county assessor's value the same as my home's market value?
No. The assessor's value is used for property taxes and is often lower than market value. It is based on a formula and may not reflect recent sales. If you need your home's market value, use comparable sales, an online estimate, or a professional appraisal instead.