CazaShort answer: open Zillow’s rentals map, draw a boundary around the home, filter to the same bedrooms and property type, collect 6–10 active listings, and take the median asking rent. Then discount for concessions and ignore listings that have been sitting. The result is an asking-rent estimate, not what tenants are actually paying.
Whether you’re checking a for-sale listing as a rental, setting the rent on your own unit, or deciding if a lease you’re about to sign is in line, the question is the same: what are similar places asking nearby? Zillow is the biggest public source of that answer. Here’s how to use it well.
Three sources, in order of trust
- Active rental listings nearby. Real units, real asking prices, this month. The best public signal, with the caveat that it’s what landlords are asking, not what tenants signed.
- Zillow’s Rent Zestimate. A model estimate shown on many listings. Useful as a sanity check, but it’s a single number with no comps shown, and it can lag the market. It’s for a single unit, so never apply it to a whole multifamily building.
- Your own survey. Calling a few listings and asking what they’ll actually take. Slow, but it’s the only way to learn about concessions that aren’t printed in the ad.
1. Pull the comps
On Zillow, switch the map to Rent. Draw a boundary around the home, about half a mile in a city, wider where rentals are sparse. Filter to the same number of bedrooms and the same property type: apartments comp against apartments, houses against houses. A 3-bed house and a 3-bed unit in a 200-unit building are different products with different rents.
For each listing, write down the asking rent, square footage, bedrooms and bathrooms, how long it has been listed, and any concession in the description (“first month free,” “6 weeks free on a 13-month lease”). Aim for 6–10. Fewer than four and you’re guessing.
2. Take the median, then adjust
Use the median asking rent, not the average. One luxury unit or one mispriced ad will pull an average around; the median holds.
Then adjust, and be honest about direction:
- Concessions. A $2,600 unit with six weeks free on a 12-month lease has an effective rent of about $2,300. Convert every comp to effective rent before you compare.
- Stale listings. A unit listed for 45 days at $2,900 is telling you $2,900 is too high, not that $2,900 is the market. Weight recent listings more.
- Size and condition. Rent per square foot helps when sizes vary, and photos tell you whether a comp’s kitchen looks like yours.
- Season. Asking rents in many markets run softer in winter and firmer in late spring and summer. A comp set pulled in January can read low for a July move-in.
- What’s included. Parking, utilities, in-unit laundry and pet policy all move the number. Note them so you’re comparing like with like.
Asking rents are a ceiling, not a floor. In a market with rising days-on-market and visible concessions, assume signed leases land below the median ask. In a market where listings disappear in days, the median ask is close to what people pay.
For investors: don’t estimate a building from one unit
On a 2–4 unit or larger building, estimate each unit type separately (1-bed, 2-bed) from its own comps, then add them up. Never multiply a Rent Zestimate by the unit count. And if the listing reports current rents, compare those with your comp median: a big gap means either upside or tenants who have been there a long time, and you should know which before you run the cap rate.
For renters: the same comps, the other way
If you’re the one signing, the comps tell you whether the ask is high, low or typical for the area and whether to negotiate; the renter version of this guide walks through it step by step. Also add up the all-in monthly cost: rent plus required fees (parking, trash, amenity, pet). A rent far below everything nearby is a reason to verify the listing and the landlord before paying anything.
Do it faster with Caza
Caza is a free Chrome extension for Zillow. On a for-sale listing click Rental comps (on a rental listing the button is Compare with nearby rents) and it pulls similar active rentals nearby, matched on bedrooms and property type, shows the typical range and the median, and labels every figure as an asking rent. You can send the median or any single comp straight into the investor numbers, and the toolbar popup has a Compare my rent tool for your own unit. On rental listings it also shows the all-in monthly cost and the effective rent after any free weeks.
Caza pulls rental comps on any Zillow listing and labels every one an asking rent.
Try Caza freeCaza is independent and not affiliated with Zillow. Comps and rents come from public Zillow pages and are a starting point, not an appraisal.