Comparative Market Analysis
Comparative Market Analysis (CMA)
Quick Definition
A comparative market analysis (CMA) is an estimate of a property's fair market value based on the recent sale prices of similar properties (called "comps" or comparables) in the same geographic area. Real estate agents prepare CMAs — typically at no charge — to help sellers set a listing price and help buyers make competitive offers. Unlike a formal appraisal conducted by a licensed appraiser, a CMA is not a certified valuation and carries no legal weight in lending decisions.
What It Means
Setting the right price is one of the most consequential decisions in a real estate transaction. Price too high and the home sits on the market, accumulating stigma and eventually requiring price cuts. Price too low and the seller leaves money on the table — sometimes tens of thousands of dollars.
A CMA gives agents and their clients a data-driven starting point by anchoring the subject property's value to what buyers have actually paid for comparable homes nearby. The logic is straightforward: a well-informed buyer in a free market will not pay more for Property A than they would for an essentially identical Property B next door.
CMAs are also called Broker Price Opinions (BPOs) in some contexts, particularly when used by banks to value properties in foreclosure or short-sale situations.
What Goes Into a CMA
A thorough CMA analyzes three categories of properties:
| Category | Description | Significance |
|---|---|---|
| Recently sold comps | Similar homes sold in past 3-6 months | Primary basis for value; actual market evidence |
| Active listings | Similar homes currently for sale | Establishes the competition; sets ceiling |
| Expired/withdrawn listings | Properties that failed to sell | Reveals overpricing mistakes; sets ceiling |
| Pending sales | Under contract but not yet closed | Leading indicator of current market |
The Comparable Selection Criteria
Agents select comps based on factors that most influence buyer decisions:
- Location: Same neighborhood, school district, ideally same street or block
- Size: Similar square footage (typically within 10-15%)
- Bedroom/bathroom count: Matching configuration
- Lot size: For single-family homes, lot size matters significantly
- Age and condition: Similar age, construction quality, and condition
- Recency: Sales within last 3-6 months (or 12 months in slow markets)
- Style: Ranch vs. two-story vs. split-level can affect value
How a CMA Is Prepared: Step by Step
- Pull the MLS data: Agent searches the MLS for recently sold properties matching the subject property's criteria within a defined radius (typically 0.5-1 mile in urban areas; wider in rural)
- Select 3-6 best comps: Choose the most similar properties — closer, more recent, and more similar is better
- Adjust for differences: Add or subtract value for differences between comps and the subject property
- Analyze active competition: What similar homes are currently listed for tells you what buyers are comparing your home to
- Review market trends: Is the market appreciating or declining? Adjust older comps accordingly
- Arrive at a price range: Calculate price per square foot and adjusted sold prices to establish a defensible range
Adjustments: The Science and Art of CMAs
No two homes are identical. Agents adjust comp prices to account for differences:
| Feature | Typical Adjustment Direction | Example |
|---|---|---|
| Extra bathroom | +$10,000-$20,000 | Subject has 3 baths; comp has 2 |
| Extra bedroom | +$15,000-$30,000 | Subject has 4 beds; comp has 3 |
| Garage (1 vs. 2 car) | +$10,000-$25,000 | Subject has 2-car; comp has 1-car |
| Pool | +$20,000-$50,000 | Varies significantly by market |
| Updated kitchen | +$10,000-$30,000 | Subject renovated; comp original |
| Larger lot (0.5 acre vs. 0.25 acre) | Varies by market | More significant in suburban/rural |
| Age (sold 6 months ago in rising market) | Appreciation adjustment | +1-3% depending on market trend |
Note: Adjustment values vary significantly by market, price point, and local buyer preferences. A pool adds more value in Phoenix than in Minneapolis.
Sample CMA Output
Subject Property: 4BR/2BA, 2,000 sq ft, built 1995, updated kitchen, 2-car garage, 0.25 acre lot
| Comp | Sold Price | Sq Ft | Beds/Baths | Sold Date | Adjustments | Adjusted Price |
|---|---|---|---|---|---|---|
| 123 Maple St | $485,000 | 2,050 | 4/2 | 3 months ago | -$5,000 (larger) | $480,000 |
| 456 Oak Ave | $460,000 | 1,900 | 3/2 | 2 months ago | +$20,000 (1 less bed, older kitchen) | $480,000 |
| 789 Pine Rd | $505,000 | 2,100 | 4/2.5 | 1 month ago | -$15,000 (extra bath, newer) | $490,000 |
| 321 Elm Ct | $470,000 | 1,980 | 4/2 | 5 months ago | +$7,000 (time adjustment) | $477,000 |
CMA Conclusion: Suggested list price range of $475,000 - $495,000, with $485,000 as the most defensible midpoint.
CMA vs. Appraisal: Key Differences
| Factor | CMA | Appraisal |
|---|---|---|
| Who prepares it | Real estate agent | Licensed/certified appraiser |
| Cost | Free (agent service) | $300-$600+ paid by buyer/borrower |
| Purpose | Setting list price; making offers | Lender verification; legal proceedings |
| Legal weight | None | Admissible in court; required for mortgages |
| Liability | Agent gives professional opinion | Appraiser carries E&O insurance liability |
| Required for mortgage | No | Yes (lender orders independently) |
| Typical timeframe | Hours to 1-2 days | 1-2 weeks |
A lender will order an independent appraisal before approving a mortgage — the CMA cannot substitute for this.
Price Per Square Foot: A Quick Cross-Check
Calculating price per square foot is a useful sanity check on CMA conclusions:
Comparable sales in subject neighborhood:
- Comp 1: $485,000 / 2,050 sq ft = $236/sq ft
- Comp 2: $460,000 / 1,900 sq ft = $242/sq ft
- Comp 3: $505,000 / 2,100 sq ft = $240/sq ft
- Average: $239/sq ft
Subject property check: $239/sq ft x 2,000 sq ft = $478,000 -- consistent with the CMA range above.
Key Points to Remember
- A CMA is a professional opinion of value, not a certified appraisal — it cannot be used for mortgage purposes
- The best comps are recent, nearby, and similar — prioritize recency and proximity above all
- Adjustments are added or subtracted to comp prices to account for feature differences
- Active listings show competition; expired listings reveal overpricing traps
- CMAs are typically free from listing agents — consider requesting one before listing or making an offer
- Price per square foot is a useful cross-check but ignores location and quality differences
Common Mistakes to Avoid
- Using outdated comps: In a rapidly changing market, 6-month-old sales may be significantly mispriced today
- Ignoring location differences: A house one block outside a top school district can sell for 10-15% less
- Over-relying on price per square foot: A luxury kitchen adds more than its prorated share; a dated bathroom subtracts disproportionately
- Confusing list price with sold price: Active listings are asking prices — only closed sales reflect what buyers actually paid
- Emotional pricing: Sellers often believe their home is worth more than the market supports — a good CMA provides objective grounding
Frequently Asked Questions
Q: Can I do my own CMA without an agent? A: You can research recent sold prices on sites like Zillow, Redfin, and Realtor.com, but public data often has gaps (sale price not always disclosed in some states) and lacks the MLS detail that agents access. You can approximate a CMA, but professional agents have access to more complete data and can make informed adjustments based on local knowledge.
Q: How many comps do I need for a reliable CMA? A: At least three to five recently sold comps are needed for statistical reliability. In rural areas or unique properties, finding good comps can be challenging — agents may need to widen the search radius or go back further in time, noting that market conditions may have changed.
Q: What if there are no good comps? A: Unique properties (distinctive architecture, unusual lot, very large or small square footage) present a true comparability challenge. In these cases, agents may use price-per-square-foot analysis, cost approach (cost to rebuild), income approach (for investment properties), or refer to an appraiser. High-end luxury homes often have sparse comparable sales by definition.
Related Terms
Real Estate Agent
A real estate agent is a licensed professional who facilitates the buying, selling, or renting of properties — representing buyers or sellers in transactions, providing market expertise, negotiating on clients' behalf, and earning a commission typically totaling 5-6% of the sale price.
10-K
A 10-K is the comprehensive annual report publicly traded companies must file with the SEC, containing audited financials, risk factors, and management's full analysis of business performance.
10-Q
A 10-Q is the quarterly financial report that publicly traded companies must file with the SEC within 40-45 days of each quarter end, providing unaudited financial statements and management's discussion of results.
1031 Exchange
A 1031 exchange allows real estate investors to defer capital gains taxes by reinvesting the proceeds from a property sale into a like-kind replacement property — a powerful wealth-building tool governed by strict IRS timelines and rules.
1040
Form 1040 is the standard IRS tax form used by individual taxpayers to file their annual federal income tax return — summarizing income, deductions, credits, and the resulting tax owed or refund due.
1040A / 1040EZ
The 1040A and 1040EZ were simplified IRS tax forms discontinued after 2017. All filers now use the redesigned Form 1040.
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