Every few weeks someone asks me a version of the same question: "Jackson, could I build a little unit out back and rent it out?" That little unit has a name — an ADU — and it's one of the most interesting tools in the house-hacking playbook right now in Central Iowa.
Here's the honest answer up front: sometimes yes, sometimes no, and the difference comes down to your city's zoning rules. Let's walk through what an ADU actually is, where they fit, and how to find out if your property can support one.
ADU stands for Accessory Dwelling Unit — a smaller, self-contained living space on the same lot as a main home. Think a finished above-garage apartment, a basement unit with its own entrance, or a small standalone "backyard cottage." The key is that it's a complete living space: kitchen, bathroom, somewhere to sleep.
People build them for all kinds of reasons — rental income, aging parents, a returning college kid (very real in the Ames orbit), or a home office that's actually separate from the house. For the investment-minded buyer, the appeal is simple: a second income stream on a single lot.
This is where I have to be straight with you — there's no single "Iowa rule." ADU regulations are set at the city and county level, and they vary a lot across our market. Ankeny, Ames, Des Moines, Urbandale, and the smaller surrounding towns each have their own zoning code, and each treats accessory units differently.
Some communities allow them with reasonable conditions. Others restrict them tightly or require a special permit. So before you fall for the idea, the right first move is a call to the city's planning or zoning department — they'll tell you what your specific lot allows. I'm glad to help you find the right office and the right question to ask.
Even where ADUs are allowed, the details determine whether it's a smart investment. A few things I'd want you to weigh: lot size and setbacks (is there physically room?), owner-occupancy rules (some cities require you to live on-site), parking requirements, and how utilities will be run to the unit.
Then there's the money side. Construction costs, the financing path, and the realistic rent for that unit all have to line up. A garage conversion is a very different budget than a ground-up backyard build. The math can be excellent — or it can quietly not work — and you want to know which before you commit.
I practice house hacking myself, so this is close to home. An ADU is one of the cleaner versions of the strategy: you live in the main house, rent the accessory unit, and let that income offset your housing cost. No shared walls inside your own front door — a real advantage over renting out spare bedrooms.
For first-time investors especially, it's a lower-drama way to learn the landlord ropes while still living on the property. Start with the numbers, confirm the zoning, and build from there.
An ADU can be a genuinely strong play — extra income, flexible space, and a foothold into investing without leaving your own lot. But it lives or dies on local zoning, so step one is always confirming what your city and lot actually allow. Don't build the spreadsheet before you've made that call.
If you're shopping with an ADU in mind, tell me early. I'll help you screen properties for lots that could realistically support one and point you to the local zoning resources to confirm it — and for the financing and construction-cost specifics, I'll connect you with a lender and builder who know this market.
Curious whether a particular property could work? Send it my way and let's take a look together.
Let's talk through your specific situation — no pressure.