(Quick multifamily value estimator)
This rule comes from the same core formula:
Property Value = NOI ÷ Cap Rate
But we simplify it so the math can be done in your head while touring a property.
Every rent increase produces income.
Formula:
Rent Increase × Units × 12
Example:
$10 rent increase
20 units
10 × 20 × 12
= $2,400 NOI increase
Divide by cap rate.
Example cap rate:
6%
2,400 ÷ 0.06
= $40,000 value increase
For a 20 unit property
$10 rent increase ≈ $40K value increase
This is where the “$10 = $200K rule” comes from.
Example:
100 units
$10 rent increase
10 × 100 × 12
= $12,000 NOI
12,000 ÷ 0.06
= $200,000 value increase
So:
$10 rent increase on 100 units ≈ $200K value increase
At a 6% cap rate
| Rent Increase | 20 Units | 50 Units | 100 Units |
|---|---|---|---|
| $10 | $40K | $100K | $200K |
| $50 | $200K | $500K | $1M |
| $100 | $400K | $1M | $2M |
Property
48 units
Current rent
$900
Market rent
$1,400
Rent gap
$500
500 × 48 × 12
= $288,000
288,000 ÷ 0.06
= $4,800,000 value increase
They are not looking at the building.
They are thinking:
“What is the rent gap?”
Because that tells them the future value.
$1 rent increase ≈ $200 value per unit
$100 rent increase ≈ $20K value per unit
Rent Gap × Units × 12 ÷ Cap Rate
= Equity Created
Because many properties have:
• long-term tenants
• owners who never raise rents
• outdated units
• mom-and-pop management
Which creates large rent gaps.
Instead of asking:
“Is this property nice?”
Investors ask:
“How far below market rent is this property?”