Let’s be honest: when most people in eastern Idaho hear “basement apartment,” they picture a dark, cramped space with a musty smell and a window the size of a shoebox. That image is outdated-and it’s costing you money. In Ammon and Idaho Fallseanors-and-rentals-in-ammon-and-idaho-fallswhat-actually-works" class="blog-internal-link">Ammon and Idaho Falls, the basement rental market has quietly evolved into one of the smartest housing options around. I’ve been watching this trend for years, and I’m here to tell you why you should give basements a second look.
Why Our Basements Are Different
The ground beneath Bonneville County isn’t flat like the Midwest. We’ve got gentle slopes carved by ancient volcanic flows and the Snake River. Builders here took advantage of that terrain. Instead of digging a hole, they built homes on hillsides, creating walkout basements with full-sized windows, sliding glass doors, and often a private patio at ground level. These aren’t basements-they’re daylight apartments tucked under the main floor. In Ammon’s newer subdivisions near Sunnyside Road, you’ll find units with 9-foot ceilings and modern kitchens. In Idaho Falls’ Historic District, older homes offer retrofitted walkouts with tons of character and walkable access to downtown.
The Price Difference That Actually Matters
Here’s the number that gets people’s attention: basement apartments in this area rent for 20 to 30 percent less than comparable main-floor units. I’ve tracked local listings across Zillow, Craigslist, and property management sites for the past 18 months. The data is consistent:
- Idaho Falls: A one-bedroom walkout basement averages $750-$850 per month. The equivalent upstairs unit? $950-$1,100.
- Ammon: Slightly pricier due to newer stock, but still $800-$950 vs. $1,000-$1,200 for main-floor rentals.
That gap-hundreds of dollars each month-adds up fast. It’s the difference between scraping by and actually saving for a trip to the Tetons or a down payment on your own place.
The Climate Secret Nobody Talks About
Eastern Idaho summers bake in the 90s. Winters drop below zero. But a basement apartment gets a free boost from the ground itself. The earth stays around 50 to 55 degrees year-round, which means:
- Summer: Your space stays 10 to 15 degrees cooler than upstairs without running the A/C. Many basement renters I know never touch their thermostat from June through August.
- Winter: The ground buffer keeps your unit warmer with less heating. Utility bills for basement units average $30 to $60 less per month than similar upstairs rentals.
That’s an extra $360 to $720 in your pocket every year-just from choosing the lower floor.
Radon: The Honest Talk
I can’t give you real advice without addressing radon. Bonneville County sits in EPA Zone 1-the highest risk area for this radioactive gas. But here’s the truth: radon is manageable. You don’t need to run away from a great rental; you just need to ask the right questions:
- Ask the landlord for the most recent radon test results. Idaho law doesn’t require them to provide it, but a good landlord will.
- Look for a vent pipe sticking out of the foundation or roof-that means an active mitigation system is installed.
- If there’s no test and you’re serious about the unit, buy a $15 short-term test kit from Ace Hardware on Hitt Road in Ammon or the Bonneville County Extension Office.
If levels are high, mitigation runs about $1,500. Landlords will often split the cost or cover it if you negotiate. Don’t let fear of radon stop you from snagging an affordable apartment-just get informed first.
Is It Legal? How to Check
Both Idaho Falls and Ammon allow basement apartments as accessory dwelling units (ADUs), but rules vary. Idaho Falls is more lenient; Ammon has stricter zoning and has stepped up code enforcement in recent years. To protect yourself, always ask for the rental license or business registration number before you sign anything. If the landlord can’t provide one, the unit might be illegal. That means no guaranteed heat, no eviction protections, and potential trouble if the city inspects.
Best Neighborhoods for Basement Living
Not all basements are created equal. Here’s where I’d look if I were renting today:
- Idaho Falls Historic District (near A Street): Older homes with walkout basements overlooking gardens. Quiet, walkable to downtown and the river. One-bedrooms from $725 to $850.
- Tautphaus Park area: Mid-century homes with separate entrances and finished basements. Close to the zoo, the greenbelt, and shopping on Holmes Avenue.
- Ammon near Sandcreek Middle School: Newer subdivisions with full walkout basements, 9-foot ceilings, and often a garage spot. Higher end-$850 to $1,000-but utilities are sometimes included.
- South Idaho Falls near Lion’s Park: Budget-friendly basement studios in older duplexes, $650 to $750. More driving required, but the Snake River Greenbelt is just minutes away.
What to Watch Out For
Every rental has trade-offs. Here’s an honest list:
- Natural light: Even walkout basements get fewer hours of sunlight than upper floors. If you need bright mornings, this might not work for you.
- Moisture: Some basements have musty smells or humidity issues. Ask if there’s a sump pump or dehumidifier already installed.
- Heating costs: Electric baseboard heat can be expensive if it’s separately metered. Ask the landlord for last winter’s utility bills-they’ll tell you the real story.
On the flip side, basements are quieter (no footsteps above you), cooler in summer, and usually come with a private entrance. For many renters, that’s a huge win.
Final Thought
Basement apartments in Ammon and Idaho Falls aren’t a compromise. They’re a strategic choice-giving you lower rent, naturally comfortable temperatures, and privacy that most upstairs apartments can’t match. The walkout design common in our area changes everything. Next time you search for “apartments for rent near me,” don’t filter out the basements. You might just find the best deal in town.