Comparable sales are one of the most important parts of a property deal. They are also one of the easiest to misuse.
A feasibility is only as strong as the evidence behind it. If the end value is too high, the profit may be imaginary. If the purchase price is based on weak comparisons, the investor may overpay before the deal even starts.
This guide explains how investors can use comparable sales, or comps, more carefully.
What Comparable Sales Are
Comparable sales are recent sales of similar properties in a similar area. They help investors estimate value by looking at what real buyers have paid.
The keyword is similar. A sale from another suburb, another product type, another market cycle or a very different site may not be a useful comparison.
At Think Property Club, investors are encouraged to look for evidence, not just opinions.
Why Comps Matter In Development
Development feasibility often depends on future end values. If the project is a duplex, townhouse or subdivision, the investor needs to estimate what the finished product may sell for.
That estimate affects:
- Purchase price
- Maximum offer
- Profit margin
- Finance assumptions
- Exit strategy
- Risk tolerance
Bad end values can make a weak deal look strong.
What Makes A Good Comparable Sale
A useful comp should match the subject property as closely as possible. Look at:
- Location and school zones
- Land size
- Dwelling type
- Build quality
- Bedrooms, bathrooms and car spaces
- Age and condition
- Street appeal
- Sale date
- Zoning or development potential
No comp is perfect. The goal is to build a reasonable evidence range.
Recent Beats Old
Market conditions change. A sale from two years ago may not reflect today's buyer demand, interest rates, lending environment or local supply.
Recent sales usually matter more, especially in moving markets. If there are not enough recent sales, investors need to be more conservative.
Active Listings Are Not Sales
Listings can be useful, but they are not proof of value. An asking price only shows what the seller hopes to receive. A sold price shows what a buyer actually paid.
This is a common beginner mistake. They use optimistic listings to support a deal instead of settled sales.
How To Use Comps In A Feasibility
A practical approach is to create a value range:
- Conservative value based on weaker or lower comps
- Expected value based on the best evidence
- Stretch value based on stronger but realistic comps
Then test whether the deal still works under the conservative and expected scenarios. If the deal only works under the stretch value, it may not be strong enough.
Example: The Dangerous High Comp
Imagine a developer uses one record sale to justify the end value of a townhouse project. That sale had premium finishes, a better street, a larger floor plan and occurred when buyer demand was stronger.
Using that number may make the feasibility look excellent, but it does not make the deal safer. The comp needs adjustment. Sometimes the best comp is not the highest sale. It is the most relevant sale.
Quick Checklist
- Are the comps recent?
- Are they genuinely similar?
- Are they sold prices, not asking prices?
- Is the product type the same?
- Does the location match buyer demand?
- Have you allowed for differences in quality and size?
- Does the deal still work at a conservative end value?
Final Word
Comparable sales are not just research. They are protection.
When investors learn how to use sales evidence properly, they make better offers, avoid emotional decisions and understand whether a deal has enough margin.
Think Property Club teaches investors how to assess opportunities with clear numbers, real evidence and practical risk checks.
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