Tenant references feel like a formality. You get a list of names, you make a few calls, everyone says nice things, and you hand over the keys. But references are one of the only times in the screening process where you can get a real human being to tell you something a credit report never will. Used right, they can stop a $15,000 mistake before it starts. Used wrong, they're just paperwork. If you want to understand where reference checks fit inside a complete screening process, our guide on what to look for in tenant screening is a good place to start before going deeper here.

In This Guide

The Three References You Should Always Request

Most landlords accept whatever list an applicant hands them. That's the first mistake.

A solid reference set has three distinct contacts, minimum:

• Prior landlord: The single most valuable reference in the stack. A prior landlord has watched this person pay rent, handle maintenance, treat the property, and behave as a neighbor. Nobody else on the list has that data.
• Employer: Confirms income and employment stability, but only if you ask the right questions (more on that below).
• Personal contact: Useful as a soft character read, but worth the least of the three. Never let it substitute for the other two.

Anything fewer than all three and you're making a decision with an incomplete picture. We've been managing properties in Denver for 15 years, and the calls we get from owners who skipped one of these contacts almost always follow the same pattern. They thought the credit score covered it. It doesn't.

Why the Prior Landlord Reference Is the One That Actually Matters

A prior landlord reference isn't just a courtesy call. It's the closest thing to a performance review your applicant has ever received as a tenant.

Ask about the lease terms, not just the tenancy

Most landlords ask "Would you rent to this person again?" and leave it there. The better questions are more specific:

• Did the tenant comply with pet and occupancy terms throughout the tenancy?
• Were there noise complaints from neighbors?
• How was the property condition at move-out?
• Was rent paid consistently and on time, or were there patterns?

We've seen unauthorized pets and unauthorized occupants come up repeatedly in our portfolio. These are rarely surprises to the prior landlord. They just don't get asked.

Verify the landlord is actually a landlord

This one's easy to overlook. Colorado's county assessor records are publicly available, and many rental properties are registered there. Cross-check the name of the "prior landlord" against the property address before you even pick up the phone.

We caught this exact issue for a Washington Park owner. The prior landlord reference checked out on the surface. A follow-up call revealed the "landlord" was the applicant's family member posing as a property manager. The property was a single-family home, and catching it before lease signing saved what could have been months of non-payment at $3,200 a month.

The Glowing Reference You Should Be Suspicious Of

Here's a contrarian take worth sitting with: a five-minute call that ends with "great tenant, no problems" is not always a green light.

An unreserved reference with no hesitation, no specifics, and no friction can sometimes be a prior landlord who is motivated to move a problem tenant along. It sounds strange. But think about it from their side.

The question that separates a real reference from a coached one is direct: "Is there anything that would give you pause about renting to this person again?"

A landlord who genuinely had a good experience will answer that differently than one who is quietly relieved you called. Listen for specifics. Listen for hesitation. A reference that can't name a single concrete detail about the tenancy deserves a follow-up question or two.

Employment References: What You're Actually Trying to Learn

Calling an employer to confirm the applicant works there is fine. Stopping there isn't.

The more useful question is income stability, not just income level.

What to ask beyond "do they work here"

• Is this a salaried position or commission-based income?
• How long have they been in this role?
• Is the position full-time and permanent?

We worked with an owner who accepted a pay stub as sufficient proof of income and didn't call the employer directly. Six weeks into the lease, the tenant disclosed they had been laid off before ever submitting the application. The owner absorbed two months of missed rent and a $1,200 filing fee before the situation resolved.

A W-2 earner with 90 days on the job and a 1099 contractor with three steady years of documented income are not the same risk profile. A box-checking call won't surface that distinction. You have to ask.

Speed Matters More Than Most Owners Realize

Denver's rental market moves fast. At an average rent of around $1,750–$1,900 a month across this market, a qualified applicant often has two or three applications pending simultaneously. A reference check that drags past 72 hours risks losing your best candidate to a property with a faster pipeline.

This is where having a system matters. Our leasing agent Gavin works reference checks in parallel, not sequentially. He contacts all three references at the same time, sets a clear response window, and flags any that go quiet. Through DoorLoop, we track where each applicant sits in the process in real time so nothing stalls.

The goal is thorough AND fast. Those two things are not in conflict if the process is set up correctly.

Colorado Law Has Raised the Stakes for Getting This Wrong

Colorado's 2023 tenant protection legislation, including HB23-1120 and SB23-184, introduced new renter safeguards: HB23-1120 strengthened eviction protections for residential tenants, while SB23-184 capped security deposits at two months' rent and allowed tenants to pay deposits in installments. And As of April 19, 2024, Colorado enacted just cause eviction protections under HB 24-1098, prohibiting landlords from evicting residential tenants without a valid legal reason.

What that means practically: once a problematic tenant crosses that 12-month mark, removal requires documented cause and significantly more legal process. The reference check you skipped before move-in becomes irrelevant once that clock runs out.

One client who came to us after self-managing a townhome in LoHi had taken a glowing personal reference from an applicant's friend at face value. No prior landlord was ever contacted. The tenant caused over $4,000 in property damage that wasn't discovered until move-out. By then, the landlord had no landlord history to go back to, no documentation, and no recourse.

What ESA Documentation Tells You About a Tenant's Character

Colorado landlords are generally required to accommodate emotional support animals regardless of a property's pet policy, under both federal Fair Housing Act obligations and Colorado state law protections—including a recently enacted state statute—though tenants should verify current requirements with a qualified housing attorney. That's not negotiable. But how a tenant handles ESA documentation says something worth paying attention to.

A prior landlord reference can often tell you whether an applicant brought an ESA to the table transparently at the start of the tenancy, or whether an animal appeared mid-lease without disclosure. One of those is a compliance situation. The other is a behavioral pattern.

Ask the prior landlord directly: "Did the tenant disclose any animals at the start of the tenancy, and were there any issues around pets or occupancy during their time there?" The answer will tell you more than the pet policy addendum ever could.

What Happens When You Place the Wrong Tenant

Many property-management professionals argue that a significant proportion of landlord-reported tenancy problems could have been anticipated by more thorough verification of information available at the reference stage — underscoring the value of rigorous tenant screening. That number is consistent with what we see here.

A single bad placement at $3,000 a month is $36,000 in annual rent exposure before you factor in damages or eviction costs. A Colorado eviction can take several weeks to a few months and involve significant costs, depending on the complexity of the case and whether it is contested. And under current state law, a problem tenant who makes it to month 13 is a much harder situation to unwind than one caught at the application stage.

We back every tenant we place with a written Leasing Guarantee. If a placed tenant doesn't work out in year one, we re-lease the property and the leasing fee is waived. One of our clients put it simply after going through the full process with our team: "Honest and transparent... first-class service through the entire process." That's the standard we hold every placement to.

A Few Questions Worth Keeping in Your Back Pocket

Good reference calls follow a loose script but stay flexible. Here's a short list worth having ready:

• "How long did the tenant live there, and why did the tenancy end?"
• "Was rent paid consistently and on time?"
• "Were there any lease violations, noise complaints, or neighbor issues?"
• "How did the tenant leave the property?"
• "Would you rent to this person again, and why or why not?"
• "Is there anything that would give you pause about renting to them?"

That last question does a lot of work. Most landlords never ask it.

If sorting through this process on your own is starting to feel like a part-time job, we're happy to have a conversation about what a structured screening process actually looks like in practice.

FAQ

How many references should I request from a tenant applicant?

Request at least three: a prior landlord, an employer, and a personal contact. Fewer than three and you're missing a meaningful piece of the picture, particularly the prior landlord, who has direct experience with how the applicant behaves as a tenant.

How long should a tenant reference check take?

In Denver's competitive rental market, try to complete reference checks within 72 hours. A qualified applicant often has multiple applications open at once, and a slow process can cost you the best candidates.

Can I verify that a prior landlord is actually who they say they are?

Yes. Colorado county assessor records are publicly available and list property ownership. Cross-checking the landlord's name against the property address before calling takes a few minutes and can catch fraudulent references before they cost you anything.

What should I do if a prior landlord gives me an unusually glowing reference with no specifics?

Push back with a direct question: "Is there anything that would give you pause about renting to this person again?" A landlord with a genuinely good experience will answer that with some texture. One who is trying to move a problem tenant along often won't.

Does Colorado's just cause eviction law affect how I should approach tenant screening?

It does. As of 2024, tenants who have lived in a unit for more than 12 months are protected under just cause eviction requirements. That means the information you surface at the reference stage becomes significantly harder to act on once a tenant crosses that threshold.

Do I have to allow emotional support animals even if my property has a no-pet policy?

Yes. Colorado requires accommodation of ESA animals regardless of the owner's pet policy. A prior landlord reference can help you understand whether an applicant has handled ESA documentation transparently in the past or introduced animals without disclosure, which is a meaningful distinction.