Choosing the right ADU floor plans is one of the most important decisions you will make when adding an accessory dwelling unit to your Iowa property. The layout you pick shapes how comfortable the space feels, how much it costs to build, and how well it serves your family for years to come. At Tiny Homes of Iowa, we help homeowners across the entire state match the perfect floor plan to their goals, whether that is housing an aging parent, welcoming adult children, or creating rental income.
The good news is that you have real options. Our ADU floor plans range from a cozy 475 square foot Studio+ all the way to a spacious 816 square foot two-bedroom. In this guide we will walk you through how to choose, what each size offers, and how the process works in Iowa.
How to choose the right ADU floor plans
Before comparing square footage, think about who will live in the space and how they will use it. The best ADU floor plans start with a clear purpose. Ask yourself a few simple questions:
- Who is the ADU for now, and who might use it later?
- Do you need one bedroom, two bedrooms, or an open studio layout?
- How important is a full kitchen versus a kitchenette?
- Will the unit generate rental income, or stay in the family?
- How much yard space and budget do you have to work with?
Answering these questions early makes the rest of the decision much easier. A grandparent who values simplicity may love a compact studio, while a young renter or a growing family may need separate bedrooms.
Comparing ADU floor plans by size
Each of our layouts is designed to feel larger than the numbers suggest, thanks to smart storage, tall ceilings, and plenty of natural light. Here is a quick look at how the main ADU floor plans compare.
475 sq ft Studio+
The Studio+ is our smallest and most affordable option. It combines a living area, kitchenette, full bath, and sleeping space in one open, efficient design. It is ideal for a single occupant, a home office with a guest area, or a low-maintenance rental. Many Iowa families choose this plan for an aging parent who wants independence without a lot of upkeep.
Mid-size one-bedroom plans
A dedicated one-bedroom layout adds a separated sleeping room, a larger kitchen, and a more defined living area. This is a popular middle ground that offers privacy while keeping costs reasonable. It works beautifully for long-term guests, caregivers, or steady rental tenants.
816 sq ft two-bedroom
The largest of our ADU floor plans gives you two bedrooms, a full kitchen, and a comfortable living space. This plan suits multigenerational families, couples who want a guest room, or owners who want to attract higher rental rates. The extra square footage makes the home feel like a true residence, not just a backyard unit.
What ADU floor plans cost and how permitting works in Iowa
Construction pricing depends on your chosen layout, finishes, site conditions, and utility connections. Rather than guess, we provide a clear, no-pressure quote so you know exactly what to expect. Larger ADU floor plans naturally cost more to build, but they can also command higher rent or house more family members, which improves long-term value.
Iowa has made the legal side dramatically easier. Thanks to a state law known as SF-592, ADUs are now allowed by right in every city and county in Iowa. That means you no longer need special approval just to be permitted to build one. Setback requirements still apply, so the unit must sit a certain distance from property lines, but the days of fighting for permission are largely over. You can read more about accessory dwelling units and their benefits from the AARP livable communities resource.
The permitting timeline is refreshingly quick too. An ADU building permit in Iowa typically takes about 3 days to 2 weeks, and permit fees usually run from a few hundred dollars up to a couple thousand dollars depending on your city. We handle the design, permitting paperwork, and construction so you can stay focused on the fun part, which is planning your new space.
Ready to explore which layout fits your property? Schedule a free call and we will help you compare options.
Making your ADU floor plans work for your goals
The smartest approach is to think about the next ten years, not just today. A studio may be perfect right now, but if you expect to host family or rent the unit later, a one or two-bedroom plan offers more flexibility. We often guide Iowa homeowners through this trade-off, balancing budget against future needs.
Every plan can be customized with finishes, accessibility features, and exterior styling that complements your main home. Our team takes the stress and complexity off your plate, from the first sketch to the final walkthrough. When you are ready to see real options for your yard, schedule a free consultation and we will map out the best path forward.
Frequently asked questions
What is the smallest of the ADU floor plans?
Our smallest option is the 475 square foot Studio+, an efficient open layout with a kitchenette, full bath, and combined living and sleeping space. It is ideal for one person or a simple rental.
Which ADU floor plans are best for aging parents?
Many families choose the Studio+ or a one-bedroom plan for aging parents because they are easy to maintain and can include single-level, accessible features. We can customize any layout for safety and comfort.
Do larger ADU floor plans take longer to permit in Iowa?
Not significantly. Thanks to SF-592, ADUs are allowed by right statewide, and permits generally take about 3 days to 2 weeks regardless of size. Setback rules still apply.
Can I customize the ADU floor plans?
Yes. Every layout can be tailored with different finishes, exterior styles, and accessibility upgrades. Schedule a free call and we will design a plan around your needs and budget.
