House Hacking in Denver: What It Looks Like to Rent Out Part of Your First Home

House hacking means someone else helps pay your mortgage while you live there. In Denver, that mostly shows up three ways: renting a room to roommates, renting an ADU or spare room short-term under the city's rules, or buying a duplex and renting the other half. None of these make your mortgage free, but all three can bring the cost down by a meaningful amount.

House hacking sounds like a buzzword until you break down what it means: you buy a place, you live in part of it, and someone else's rent covers a chunk of your mortgage. In Denver right now, that shows up three main ways, and they're not equally easy, equally cheap, or equally hands-on.

Renting a Room to Roommates

This is the simplest version, and probably the one most people already have access to without buying anything new. No renovation, no license, no city process, just a spare bedroom in a house you already own.

Rooms in Denver are currently renting for somewhere between $900 and $1,500 a month, depending on the neighborhood and whether utilities and furnishing are included (SpareRoom). One roommate at $1,000 a month is $12,000 a year going toward your mortgage instead of coming entirely out of your paycheck. Two roommates, and you're looking at a real dent in your monthly payment, no purchase required.

Modern and cozy bedroom available for rent with stunning city and mountain views, offering comfort and tranquility.

An ADU or Spare Room as a Short-Term Rental

This is the one Denver's short-term rental rules govern, and it's worth understanding before you get excited about the income side. To legally operate a short-term rental in Denver, you need to live at the property as your primary residence, plus a license from the city and a lodger's tax ID (Steadily). It sounds like a lot written out like that, but in practice it's a quick, one-time step through the city, not a much of a hurdle once you know it's coming.

The bigger decision is whether the numbers make sense for your situation. Building an accessory dwelling unit (ADU) in Denver runs anywhere from about $80,000 for a basement conversion up to $450,000 for a fully detached unit, depending on what you're building and where (ADU Glossary). On the income side, ADU rentals are currently bringing in somewhere between $1,500 and $2,800 a month depending on the neighborhood — Capitol Hill and Park Hill tend to run lower, Highlands higher. If you already have a basement or garage that could convert instead of building new, the entry cost drops a lot, and the math starts looking a lot more realistic for a first-time buyer.

Charming exterior views of a modern basement and garage ADU conversion, showcasing stylish architecture and cozy outdoor spaces at sunset.

Buying a Duplex

This is probably the version most people picture when they hear "house hacking", you buy a property with two units, live in one, and rent the other.

Here's what that can look like: a $525,000 duplex in Englewood, financed with an FHA loan at 3.5% down (about $18,400), running a full mortgage payment of roughly $3,800 a month once taxes, insurance, and mortgage insurance are factored in. Rent the other unit for around $1,650 a month, and your out-of-pocket housing cost drops to about $2,150 a month (Sheepdog Property Management). That's not free housing, it's meaningfully cheaper housing, while you build equity across the entire property, not just your half.

If a low down payment is part of what makes this feel possible, it's worth understanding the full menu of first-time buyer programs available in Colorado — You're Closer to Buying a Home Than You Think and First-Time Home Buying Programs: What's the Catch? both go into the CHFA and metroDPA programs that can lower that upfront number even further.

Modern duplex in Denver framed by a scenic backdrop of mountains and cityscape, showcasing sleek architectural design and lush landscaping.

In Conclusion

None of these three approaches erase your mortgage, and none of them are free money. What they do is lower your housing cost while you build equity in something you own, whether that's a roommate covering part of a room, a short-term rental covering part of an ADU, or a tenant covering half of a duplex. The right one for you depends on how hands-on you want to be, how much upfront cash you have, and whether you'd rather have a roommate, a stranger for a few nights, or a full second household sharing your address.

If you're trying to figure out which version of this fits your budget and your comfort level, I'm happy to walk through the real numbers with you before you buy. Grab my First-Time Home Buyer Guide or join the newsletter for more of these breakdowns.

This is for educational purposes only and should not be considered financial, legal, or tax advice. Talk with the appropriate professional before making a final decision.