Most multifamily owners know what their property is worth today. Very few know what it could be worth — and the difference often comes down to one number: the rent gap.
What Is a Rent Gap?
A rent gap is the difference between the rents you are currently charging your tenants and the rents that comparable units in your market are actually achieving. It is sometimes called the "rent-to-market gap" or "below-market rent spread."
When a landlord has not consistently pushed rents to market — whether out of goodwill toward long-term tenants, lack of market data, or simple inertia — a gap opens up between in-place rents and market rents. That gap represents income the property is not generating but could be.
Simple definition: Rent gap = market rent − current rent, multiplied across all units. It is the unrealised income sitting inside your property right now.
Why the Rent Gap Matters More Than You Think
Here is where most property owners are surprised. The rent gap does not just affect your monthly income — it directly and dramatically affects what your property is worth.
Multifamily properties are valued using a simple formula: net operating income (NOI) divided by the market cap rate. Every dollar of additional NOI gets multiplied into property value by the cap rate.
This means a rent gap is not just a cash flow problem. It is a valuation problem — and a valuation opportunity. Close the gap and you do not just earn more rent. You create a property worth significantly more money.
A Real Las Vegas Example
Let's walk through a realistic scenario for a 10-unit Las Vegas multifamily property:
| Unit type | Units | Current rent | Market rent | Monthly gap | Annual gap |
|---|---|---|---|---|---|
| 1 Bedroom | 5 | $1,100/mo | $1,400/mo | $1,500 | $18,000 |
| 2 Bedroom | 5 | $1,400/mo | $1,700/mo | $1,500 | $18,000 |
| Total | 10 | $3,000/mo | $36,000/yr | ||
| Value increase at 5.5% cap rate | +$654,545 | ||||
That is over $654,000 in additional property value sitting unrealised — simply from bringing rents to market as leases turn over. No renovation required. No refinancing. Just market-rate rents.
Key insight: In Las Vegas right now, rent gaps of $150–$350 per unit per month are common on properties where owners have held tenants at below-market rents. On a 10-unit building at a 5.5% cap rate, a $200/month gap per unit represents over $436,000 in unrealised property value.
How to Calculate Your Rent Gap — Step by Step
Break out your 1-bedrooms, 2-bedrooms, and any other unit types. Note the monthly rent for each.
Check Zillow, Apartments.com, and Craigslist for similar units in your specific submarket — not just the broader city. North Las Vegas rents differ from Henderson rents.
Market rent minus current rent equals the monthly gap per unit. Multiply by the number of units of that type.
This is the additional annual NOI available once rents are brought to market at turnover.
Annual rent gap ÷ cap rate = potential increase in property value. This is the number that changes how you think about your asset.
Quick Rent Gap Calculator
For a full analysis including DSCR, cash flow and full value-add report — use the complete calculator →
Rent Gaps in the Las Vegas Market
Las Vegas is one of the best markets in the US for rent gap investing right now. Here is why: the metro experienced sharp rent increases in 2021–2022, but many long-term landlords — particularly mom-and-pop owners of 2–10 unit properties — did not pass those increases through to their tenants. Those owners are now sitting on rent gaps of $150–$400 per unit per month.
At the same time, more of these owners are looking to exit. Rising refinancing costs, aging ownership, and estate planning pressures are bringing motivated sellers to market. For a buyer who understands the rent gap analysis, these properties represent some of the most compelling value-add opportunities available anywhere in the country.
North Las Vegas is particularly interesting. Business relocations are driving employment growth that is feeding renter demand — but rents in the submarket have not fully caught up to the new demand level. Investors acquiring in North Las Vegas today are buying into a rent gap that is tightening from both directions: current rents below market, and market rents rising.
Frequently Asked Questions
Find your rent gap — free
Use the full calculator to analyse your property's cap rate, cash flow, DSCR, and complete rent gap value-add opportunity in under two minutes.
Run full analysis → Call Jason directly