How to Pull Real Estate Comps by Address: Free & Paid Tools

Pull real estate comps by address. It's non-negotiable for pricing, underwriting, or making an offer that won't blow up your returns. Comps give you the data-driven proof you need — not just a hunch about what a property's worth. And here's the thing: most investors get this wrong. They either grab the nearest five sales without thinking or waste hours adjusting for factors that barely matter. This guide covers the free tools that work, the paid platforms worth your money, the proximity rules that actually matter, and the specific mistakes that'll tank your deal analysis.

What Are Real Estate Comps?

Comps — short for comparable sales — are recently sold properties similar enough to yours that they tell you what your place is actually worth. Here's the critical part: they have to be *sold*. Active listings and pending deals? Those are just asking prices or accepted offers. They don't mean squat. Only closed transactions give you real market data you can bank on.

The Four Core Characteristics of a Good Comp

Appraisers, agents, and investors all judge comps the same way. Four things matter:

1. Location: Closer is better — way better. Neighborhood boundaries, school districts, even which side of the street you're on can swing values meaningfully.
2. Size: Gross living area (GLA) is what gets matched first. Bedroom and bathroom count factor in, but square footage typically carries more weight in the analysis.
3. Condition: A gut-renovated house and one sitting with years of deferred maintenance aren't comparable without adjustment. What shape was it in on closing day? That matters a lot.
4. Age / Year Built: New construction usually costs more than older homes. But architectural style, build quality, and what you've done to the place can close that gap or eliminate it entirely.

Who Uses Real Estate Comps?

Everyone in the transaction uses them. Buyers craft offers around comps. Sellers price competitively with them. Agents build Comparative Market Analyses (CMAs) on top of them. Appraisers justify lending values to lenders using them. And if you're an investor? You're using comps to calculate your maximum allowable offer and your after-repair value (ARV) — they're the foundation of your deal analysis. Want to go deeper? Check out our framework at Real Estate Comp Analysis: Running Comps Like a Pro.

How to Find Real Estate Comps by Address: Step-by-Step

Here's the workflow. It's basically the same regardless of which platform you're using.

Step 1: Start with Free Online Platforms

You've got fast starting points with the free portals. Most U.S. addresses will work on Zillow, Redfin, or Realtor.com.

• Zillow: Head to the subject property's listing page and scroll down to "What's My Home Worth?" or use the Zestimate comparables feature. This shows you exactly which sold properties Zillow's algorithm pulled. Want to dig deeper? Search "sold" homes on the map view, then filter by beds, baths, square footage, and sale date to build your own list.
• Redfin: Their interface is built for this. Use the "Sold" filter in the search map, pull up your subject address, and apply filters for properties sold in the last 90 days, similar square footage (±20%), same property type, and comparable bedroom/bathroom count. The platform also generates an automated estimate with the exact comps it used—you can review each one individually.
• Realtor.com: Look for the "Recently Sold" feature and filter by home type, price range, square footage, and date range. Click into each sold listing to access full sale details, recorded price, and sale date.

Step 2: Check County Recorder and Assessor Databases

County recorders hold the official public record. Every deed and transfer document lives there. Most counties now offer searchable online databases. Pull up your subject property address, then hunt for nearby recent sales using the parcel map or address proximity search tools. And here's where the assessor database gets useful: it'll show you property characteristics like square footage, year built, lot size, and assessed value. This data helps you qualify or disqualify potential comps fast. One critical thing—assessed value and market value are often drastically different. Don't mix them up.

Step 3: Work with a Real Estate Agent for MLS Access

The Multiple Listing Service is still king. Why? Verified sale prices, accurate property details from listing agents, and historical records that show price changes and days on market. Licensed agents pay $32.50–$60.50 per month (as of 2026) for MLS subscriptions on top of NAR membership fees. But if you're not licensed? Partner with an agent for a CMA. Most provide them free as part of their client services.

Step 4: Use iBuyer and Valuation Platforms as Secondary Sources

Opendoor and similar platforms publish their offers in some markets. That's one data point. More valuable—their online valuation tools pull from sold comp data and actually show you which comps they're using in their estimates. Think of these as directional signals, not gospel.

What Makes a Strong Comparable Property?

Here's the truth: not every sold property counts as a comp. The difference between a solid analysis and garbage-in-garbage-out comes down to whether you're filtering on four specific criteria—proximity, recency, property type, and condition. Know these rules cold, and you'll spot weak comps before they mess up your underwriting.

Proximity and Location Parameters

Dense urban market? Stay tight. Look for sold properties within 0.25 to 0.5 miles of your subject address, preferably in the same neighborhood or subdivision. Suburbs are more forgiving—a 1-mile radius works as your starting point. But rural or sparse markets? You might stretch to 5 miles or beyond. Just document why each comp falls outside the tighter parameters. No shortcuts.

Recency of Sale

Ninety days. That's your gold standard—90 days or fewer from the valuation date. Most appraisers will grudgingly accept sales up to six months old as primary comps. In slow markets with justification on the file, you can push to 12 months. And here's where it matters: the FHFA House Price Index showed +2.1% year-over-year appreciation in Q2 2026. Even a six-month-old sale needs a time adjustment to reflect what's actually happening today.

Property Type and Structural Similarity

Single-family homes get compared to single-family homes. Condos to condos, townhomes to townhomes. Non-negotiable. Once you're in the same property type, tighten your filters further.

• Gross living area within ±20% (tighter is better)
• Same number of bedrooms, or ±1 with adjustment
• Same number of full baths, or ±1 with adjustment
• Similar lot size for detached homes
• Similar garage or parking configuration

Condition and Renovation Status

A fully renovated comp and a cosmetic fixer sitting on the same block aren't comparable—they're not even close without serious adjustments. When you're pulling comps, write down the condition at sale. MLS remarks, listing photos, agent notes—these tell you what you need to know. County records alone? They won't mention that kitchen update or roof replacement.

How Many Comps Do You Need?

Three to five. That's the standard, and it's standard for a reason. Three gives you the minimum range you can defend. Five or more? That's where outliers start to reveal themselves statistically. Lenders underwriting loans require at least three. But if you're running ARV analysis for a BRRRR or fix-and-flip deal, don't cheap out—pull four or five solid comps and plug them into our BRRRR Real Estate Calculator to stress-test your numbers.

How to Adjust Comps for Differences

You'll rarely find a perfect comp. That's why we adjust. The whole point of this process is to account for what's different between your comps and your subject property—which gets you a much sharper value estimate.

Adjusting for Square Footage

Start by calculating the price per square foot (PPSF) on each comp. Just divide the sale price by gross living area. Once you've got that number, multiply it by the square footage difference between the comp and your subject. That's your dollar adjustment. Here's a real example: a comp sold at $200/sqft, and your subject's got 200 more square feet. You'd add $40,000 to the comp's sale price as a positive adjustment to reflect your subject's true value.

Accounting for Condition and Upgrades

These adjustments are trickier because they're qualitative. But don't skip them. A fully renovated kitchen and baths in a comp that your subject doesn't have? Knock the comp's value down with a negative adjustment. Work the other direction too—if the comp suffered from deferred maintenance and sold at a discount, but your subject's in better shape, you apply a positive adjustment. And here's the key: appraisers use paired sales to nail down the actual market value of these differences. Two properties identical except for one feature? That's your gold standard data.

Lot Size and Land Adjustments

When land value matters—waterfront properties, big rural parcels, infill urban lots—you can't ignore lot size differences. Figure out the land value per acre or per square foot by looking at vacant land sales in your submarket. Then apply a proportional adjustment based on the acreage gap between the comp and subject.

Age and Year Built Considerations

Effective age beats chronological age every time. A 1960s house that got completely gutted and rebuilt to current standards? It's effectively 10 years old, not 60. And when your comps are 10+ years apart in effective age without renovation context to explain it, you need a market-derived depreciation adjustment to make the numbers work.

Want to speed this up? AI-Powered Real Estate Comps: Tools That Automate Comparative Analysis digs into platforms that handle adjustment calculations at scale. This matters if you're running high volume deals.

Free Tools and Resources to Pull Comps for Any Address

Below you'll find the main free and freemium platforms available right now for pulling real estate comps by address. Keep in mind — accuracy ratings are based on general performance benchmarks. Your actual results? They'll vary depending on your market, property type, and what data's actually available in your ZIP code.

Zillow's Zestimate works as a solid starting point for on-market homes. The median error rate sits at just 1.9% for on-market properties as of 2026. But here's the catch — that accuracy drops hard. Off-market properties carry a 7.0% median error. Do the math on a home at the August 2026 U.S. median existing-home sale price of $429,100. A 7% error? That's $30,000 you could leave on the table. For any valuation decision worth making, that's real money. Want to dig deeper into which platform actually wins for your specific use case? Check out Best Real Estate Comps Tools: Compare Property Values Like a Pro.

And if you're building comp data into automated workflows — which smart investors should be — Real Estate Comps API: Tools and Integration for Investors covers your programmatic options.

Comp Strength Checklist

When you're vetting comps for your subject property, keep this table handy. It'll save you from pulling bad data into your analysis:

Common Mistakes to Avoid When Using Comps

Even seasoned investors slip up here. Miss these mistakes upfront, and you'll end up chasing mispriced listings or making offers that kill your deal economics.

Using Pending or Active Listings as Comps

Here's the thing: active listings aren't comps—they're wish lists. Sellers can ask whatever they want. What actually matters? What a buyer shook hands on and what the deal closed at. Pending sales get you closer to reality, sure, but that accepted offer price and the final recorded price don't always match. Stick to closed, recorded sales. Period.

Ignoring Neighborhood Micro-Differences

Same ZIP code doesn't mean same market. Two streets apart, and you could be looking at completely different values because of school zones, proximity to commercial corridors, noise levels, views, flood zone status, or HOA rules that tank resale value. A comp two blocks over in a different school district? That's weak evidence. Always verify your comps share the same meaningful neighborhood characteristics as your subject property.

Overlooking Condition at Time of Sale

MLS data won't tell you the whole story. An "as-is" estate sale selling at a 20% discount isn't the same animal as an arm's-length retail transaction on a move-in-ready home. Dig into listing photos, agent remarks, and sale-to-list ratios to catch distressed or below-market sales. Exclude them or adjust for condition—don't pretend they're equivalent.

Relying on Too Few Comparables

One or two comps? You're flying blind. One unrepresentative outlier will skew your entire value estimate. You need at least three solid comps to have any statistical grounding. In slow or rural markets where inventory's thin, document your expanded search radius and time adjustments—make your reasoning transparent.

Using Outdated Sales Data Without Time Adjustment

Markets move. National appreciation hit +2.1% year-over-year as of Q2 2026 per the FHFA—which means a comp from 12 months ago is already stale without adjustment. Calculate that monthly appreciation rate, then apply it backward to bridge the gap between when the comp sold and your valuation date. Don't skip this step in an appreciating market.

Comps vs. Appraisals: Key Differences

Know the difference between DIY comp work and a formal appraisal. It'll save you time and money when you're trying to figure out which tool actually matters for your deal.

A licensed appraiser has to follow USPAP (Uniform Standards of Professional Appraisal Practice). They'll physically inspect your subject property, document comparable sales, make adjustments, and hand you a certified opinion of value in writing. Your lender won't accept an agent's CMA or your own ARV analysis — they need that formal appraisal for underwriting.

Free comp tools work perfectly fine for what matters: figuring out your initial offer, running a quick ARV underwrite, talking through pricing strategy, or just checking where the market's at. But they won't cut it when your lender demands an appraisal, when you're contesting a tax assessment, or when litigation and estate work are involved.

PropStream changes the game a bit. At $99/month as of 2026, you're getting MLS-quality comps data plus nationwide property records. If you're an active investor, this is the sweet spot between free tools and dropping money on a full appraisal. Want to explore other options? Best Real Estate Comps Websites: Compare Tools for Accurate Property Valuation breaks down the whole market.

Comp Proximity Guidelines by Market Type

Using Comps for Different Real Estate Scenarios

The mechanics stay the same. But how you use them? That changes by scenario.

Pricing a Home for Sale

A solid CMA pulls five to seven recent sold comps, three to five active competing listings, and any pending sales for context. The sold comps give you your value range; active listings show you what's actually competing in the market right now. Here's the thing — even though the August 2026 national median existing-home sale price hit $429,100, pricing strategy is ruthlessly local. National medians show you the macro picture, sure. But your comp set? That's what tells you where to actually price.

Making Competitive Offers as a Buyer

Pull comps for every property you're seriously considering before you write an offer. And don't skip this step. You need to know market value independently — the listing agent's CMA isn't your friend here, it's designed to justify the seller's target price. Your comp analysis tells you if that asking price is at, above, or below market. That intel drives your entire offer strategy.

Estate and Inherited Property Valuation

Estate attorneys and accountants need a "date of death" value for tax purposes. This is a retrospective valuation based on comps from the date of passing, not today's market. You're pulling historical sold data from county records or MLS archives — current market data won't cut it here.

New Construction Comparability

Comparing resale homes to new construction requires a different approach. The numbers tell part of the story: Q2 2026 median new home sale price was $410,700 versus the Q1 2026 national median single-family existing-home price of $404,300. That's a modest new construction premium in aggregate. But local markets vary wildly. When you're comping a resale against new construction in the same area, adjust for builder incentives, warranty value, and customization premiums — those inflate the new construction price relative to a truly comparable resale.

Unique or Off-Market Properties

Historic designations. Large acreage estates. Unusual floorplans. When a property's got truly unusual characteristics, traditional comps don't exist. Appraisers use "the best available comps" and apply larger adjustments with detailed narrative support to justify their work. What should you do? Widen your search geography. Include older sales with time adjustments. And seriously consider getting a formal appraisal before you commit capital. For off-market deal structures where pricing accuracy matters most, check out our overview of Assignment Contracts in Real Estate: How Wholesalers Get Paid.

If you're analyzing rental income potential alongside sale comps, How to Use Rental Comps to Maximize Rent (Free Tools Included) gives you the same framework for the rental side. Building a full investment strategy around your comp analysis? Our Real Estate Investing Business Plan: Free Template helps you structure the whole thing.

Handling Slow Markets and Thin Comp Environments

Rural areas and niche property types kill comp availability. You're stuck with limited recent sales and a thin market to work with. But you've got options — and they work if you're methodical about them.

Start by stretching your time window. Go from 90 days to 6 months. Then to 12 months if you need to. The trick? Apply a time adjustment factor based on actual local price trends — not guesses. Next, expand geography in concentric rings outward from your subject property. Document why you're making each expansion. This matters when your report gets scrutinized.

Then there's paired sales analysis. Find two sales of nearly identical properties except for one variable — maybe a garage, extra bathroom, or square footage difference. That difference tells you the implied adjustment rate, even when direct comps are nowhere to be found.

Seasonal swings mess with everything. Spring and summer? Transaction-heavy. November through January? Comp sets dry up completely.

Always flag the seasonal context of your comps. A property that sold in a hot spring market may show inflated value for a winter valuation analysis. You might need a downward seasonal adjustment to account for that timing difference.

How Technology Is Changing Comp Analysis

AI and machine learning are doing the heavy lifting now. They pull and adjust comps automatically—no manual hunting through MLS. These platforms chew through thousands of data points: property records, satellite imagery, market transactions. You get instant comp sets that would've taken hours to build by hand. If you're scaling your analysis across multiple deals, check out AI Tools for Real Estate Investors: Complete Guide 2026 and AI Tools Transforming Real Estate Investing in 2026 for a breakdown of what's actually available right now.

But here's the catch: algorithms still choke on unique properties, thin markets, and condition details that don't fit the model. You need human judgment for those.

Conclusion

You pull comps the same way every time—and that consistency is what separates solid valuations from guesses. Start free. Zillow, Redfin, county recorder databases. They're fast for initial reads. Then layer in MLS access through an agent or upgrade to PropStream if you're running numbers constantly. The real work happens when you filter by four things: location, size, condition, age. Find comps that match. Adjust for what doesn't. You're hunting for three to five closed, arm's-length sales within 90 days and your target radius. Pending deals, short sales, REOs from three neighborhoods over? Skip them. They'll poison your numbers.

But know your limits. When a lender's involved, a court's watching, or you're moving serious capital—get a formal appraisal. It costs more upfront and saves you from expensive mistakes downstream.

Run this process enough times and you'll read any market instantly. The platforms that make it happen are all catalogued here: Best Comparables (Comps) Websites for Real Estate Investors & Appraisers.

Frequently Asked Questions About Real Estate Comps

How recent should comps be to be valid?

Ninety days or fewer from your valuation date — that's your sweet spot. Most appraisers will go six months back for primary comps, and they'll stretch to 12 months in slower markets (though they'll document the hell out of it and apply a time adjustment). And here's the thing: in appreciating markets like the +2.1% national appreciation rate the FHFA recorded in Q2 2026, even a few months makes a difference. You need a time adjustment to stay accurate.

How far away can a comparable property be from the subject?

Distance rules change fast depending on where you're operating. Urban and suburban? Stay within 0.25 to 1 mile — same neighborhood or subdivision. Rural deals are a different animal. You might need to go five miles out just to find enough comps, and appraisers will push even further if they can justify it. The real standard is simpler than it sounds: Does the comp's market area actually reflect the same buyer and seller dynamics as your subject property?

Can you use pending sales as comps?

No. Not as your primary comp, anyway. Pending sales show an accepted offer price, sure. But they're not closed. They're not recorded. That final sale price could shift because of repair issues, renegotiations, or deals falling apart entirely. You can use pending sales to support your market direction story. They just can't be the anchor on your value conclusion. Stick with closed, recorded sales only.

What if there aren't enough comps in the area?

You expand strategically. Start by stretching your time window — go from 90 days to six months. Then expand geography in concentric rings outward from the subject. Next, consider adjacent property types, but hit them with meaningful adjustments. Document every single move you make and spell out your time and location adjustments explicitly. In truly thin markets? Get a formal appraisal from a local expert who actually knows the area's quirks. That's your best bet for a defensible value opinion.

How accurate are online comp estimates for off-market properties?