A Comparative Market Analysis is how real estate professionals price homes. Understanding how a CMA works helps you evaluate whether your agent’s pricing recommendation makes sense — whether you are buying or selling.
A CMA helps you determine fair market value before making an offer. See our full home buying process guide and learn how days on market affects negotiation.
How a CMA works
A CMA estimates property value by analyzing three categories of comparable properties:
| Category | What It Shows | Why It Matters |
|---|---|---|
| Sold comparables | What similar homes actually sold for | Most important — shows what the market actually paid |
| Active listings | What similar homes are currently listed for | Shows your competition (for sellers) or options (for buyers) |
| Expired / terminated | What similar homes failed to sell at | Shows what the market rejected — a pricing ceiling |
The CMA process
- Agent identifies comparable properties (comps) within the same neighbourhood or nearby
- Comps are selected based on similarity: size, age, condition, property type, lot size
- Agent adjusts for differences between each comp and the subject property
- Agent analyzes the data to arrive at a recommended price range
- Agent presents the CMA to the client with their pricing recommendation
What makes a good comparable
| Factor | Ideal Comp | Acceptable Comp | Poor Comp |
|---|---|---|---|
| Location | Same street or block | Same neighbourhood (within 1 km) | Different neighbourhood |
| Sale date | Within 30 days | Within 3 months | Over 6 months ago |
| Property type | Exact match (detached to detached) | Similar (semi to semi) | Different (condo to detached) |
| Size | Within 10% of subject’s square footage | Within 15%–20% | Over 20% difference |
| Age/condition | Similar age and condition | Same era with minor differences | Significantly older/newer or different condition |
| Bedrooms/bathrooms | Same count | ±1 bedroom/bathroom | Significantly different |
| Lot size | Within 15% | Within 25% | Very different lot size |
Adjustments: how agents account for differences
No two properties are identical. Agents adjust comp prices to account for differences:
| Feature | Typical Adjustment |
|---|---|
| Extra bedroom | +$15,000–$40,000 (depends on market) |
| Updated kitchen | +$15,000–$30,000 |
| Updated bathrooms | +$10,000–$20,000 per bathroom |
| Finished basement | +$20,000–$50,000 |
| Garage (vs no garage) | +$20,000–$50,000 |
| Corner lot / larger lot | +$10,000–$30,000 |
| Pool | +$10,000–$25,000 (varies — some buyers see pools as negative) |
| Older roof / furnace / AC | −$5,000–$20,000 |
| Busy road / backing onto commercial | −$15,000–$40,000 |
| Waterfront / premium view | +$50,000–$200,000+ |
Example CMA adjustment
Subject property: 3-bed, 2-bath detached, 1,800 sq ft, updated kitchen
| Comp | Sale Price | Adjustments | Adjusted Price |
|---|---|---|---|
| Comp 1 — same street, 3-bed, 2-bath, 1,750 sq ft, original kitchen | $680,000 | +$20,000 (kitchen) | $700,000 |
| Comp 2 — 2 blocks away, 4-bed, 2-bath, 2,000 sq ft, updated | $730,000 | −$25,000 (extra bed, size) | $705,000 |
| Comp 3 — same neighbourhood, 3-bed, 1-bath, 1,800 sq ft, updated | $665,000 | +$15,000 (extra bath), +$20,000 (kitchen) | $700,000 |
CMA estimated value: $700,000–$705,000
CMA vs appraisal
| Feature | CMA | Appraisal |
|---|---|---|
| Prepared by | Real estate agent | Licensed appraiser (AACI, CRA, or DAR) |
| Methodology | Agent’s market knowledge + comparable analysis | Standardized (CUSPAP — Canadian Uniform Standards of Professional Appraisal Practice) |
| Cost | Free (typically) | $300–$500+ |
| Purpose | Pricing guidance for listing or offering | Formal valuation for lender mortgage underwriting |
| Legally binding | No | Yes (appraiser’s liability for accuracy) |
| Accepted by lenders | No | Yes |
| Includes property inspection | No (exterior view only, typically) | Yes (appraiser inspects interior and exterior) |
| Accuracy | 3%–15% depending on comps and agent skill | 3%–5% in normal market conditions |
CMA vs automated valuation models (AVMs)
| Feature | CMA | AVM (Online Estimate) |
|---|---|---|
| Source | Real estate agent | Algorithm (realtor.ca, Zillow, bank tools) |
| Accounts for condition | Yes — agent adjusts for visible condition, upgrades | No — cannot see inside the property |
| Accounts for upgrades | Yes | No |
| Neighbourhood nuance | Yes — agents know micro-location factors | Limited |
| Speed | Hours to days | Instant |
| Cost | Free | Free |
| Accuracy | Higher (3%–10%) | Lower (5%–20%+, especially for unique properties) |
How sellers should use a CMA
Pricing strategy based on CMA
| Strategy | When to Use | Example |
|---|---|---|
| List at CMA value | Balanced market, reasonable expectations | CMA says $700K → list at $699,900 |
| List below CMA (underpricing) | Hot seller’s market — generate multiple offers | CMA says $700K → list at $649,900 (offer date strategy) |
| List above CMA | Buyer’s market (testing the waters), unique features | CMA says $700K → list at $729,900 (be prepared to reduce) |
Getting multiple CMAs
Get 2–3 CMAs from different agents:
- If all agents suggest a similar range ($690K–$710K), you can be confident in the pricing
- If one agent suggests significantly more ($750K), they may be “buying the listing” — inflating the price to win your business, knowing they will recommend a price reduction later
- If one agent suggests significantly less ($650K), they may be trying to get a quick sale
How buyers should use a CMA
Your buyer’s agent prepares a CMA to help you determine your offer price:
| CMA Finding | Offer Strategy |
|---|---|
| Listing price matches CMA | Offer at or near asking — the property is priced fairly |
| Listing price above CMA | Offer below asking — the property appears overpriced |
| Listing price below CMA | Expect competition — the property may be underpriced to generate multiple offers |
| No good comps available | Proceed with caution — consider an appraisal condition |
Limitations of CMAs
| Limitation | Impact |
|---|---|
| Agent bias | Listing agents may inflate the CMA to win your listing; buyer agents may deflate it |
| Market volatility | In rapidly changing markets, 3-month-old comps may not reflect current values |
| Unique properties | Waterfront, heritage, oversized lots — few true comparables exist |
| Condition not inspected | Agents typically do not enter or inspect comps they use |
| New construction areas | Builder pricing and incentives distort resale comparisons |
| Small markets | Rural and small-town markets may have very few recent sales |
Key takeaways
- A CMA is the foundation of pricing strategy — always review one before listing or offering
- The best comps are recent, nearby, and similar in size, type, and condition
- Adjustments are subjective — experienced agents with local knowledge make better adjustments
- Get 2–3 CMAs from different agents to triangulate value
- A CMA is not an appraisal — your lender requires a formal appraisal for mortgage underwriting
- Online estimates (AVMs) are useful starting points but cannot replace a professional CMA