Truth Over Optimism
Feasibility comes before design. If the lot cannot hold the home, we say so before you spend a dollar on drawings.
Feasibility first
ADUs AND SMALL-FORMAT HOMES•DESIGN|BUILD
Build small. Live well.
Thoughtfully designed ADUs and small homes, from first sketch to move-in day.
15+ Years of Experience
Madison & Dane County
ADU Design-Build
Madison, Wisconsin
Dane County
Accessory Dwelling Units
In-Law Suites
Senior Suites
Backyard Cottages
608-400-0121
ADU Design-Build
Madison, Wisconsin
Dane County
Accessory Dwelling Units
In-Law Suites
Senior Suites
Backyard Cottages
608-400-0121
First Things First · What's an ADU & small-format home?
What's An ADU?
Not a shed. Not a box. Not a maybe.
An ADU — an accessory dwelling unit — is a fully independent home on your lot, with its own entrance, kitchen, and bathroom. Families use it to keep an aging parent thirty steps away instead of a $12,000–$15,000-a-month care facility, to add a two-story backyard workspace and guest suite, or to build lasting rental equity.
Learn More →
What we build
ADUs and Small-Format Homes
One home on your lot, or several. The building type follows the site and the zoning. In-law suites are a common reason to start.
Backyard
Detached ADUs
A separate home on your lot.
Addition
Attached ADUs
Shares a wall with the house.
The broader practice
Small-Format Homes
Smaller homes, planned as a set.
Ordinance 90557
Cottage Courts & Small-Format Developments
Up to eight homes on one Madison lot.
Above the cars
Garage ADUs
A home over the garage.
Poolside
Pool Houses
Storage, a gathering space, or a suite.
Work
ADU Offices
A workplace in the yard.
Shared space
Pocket neighborhoods
Homes arranged around a common green, not a driveway.
Attainable
Workforce homes
Detached homes for people who already work in the community.
Urban lots
Infill
Corner lots, deep lots, and parcels other projects skip.
UNDERSTANDING ADU PRICING
Say no to Napkin math.
WHAT IT USUALLY LEAVES OUT
- Permitting
- Engineering
- Site work
- Finish packages
We show you the full number before you sign anything.
Where We Come In
Get Your Move-In Ready Home with Our Boundless System
Building ADUs involves complex coordination with local zoning, utility access, and permitting. We've developed a proven process that keeps your project moving with transparency and predictable timing.
1
Vision Alignment + Feasibility
We start by understanding your goals and evaluating your property to confirm feasibility, placement, and overall fit — so there are no surprises down the line.
2
Systematic ADU Design
Work with our team to design your ADU using our proven system — whether that's one of our efficient base plans or a thoughtfully customized layout tailored to your needs.
3
Fast, Transparent Pricing
You'll receive clear, upfront pricing based on real site conditions and design decisions, allowing you to move forward with confidence.
4
Efficient Permit Coordination
Our permitting team handles plan preparation and submissions, managing the approval process end-to-end while keeping things moving efficiently.
5
Streamlined Build Process
From foundation to final finishes, we manage the entire construction process — typically 4–6 months, not including extended permit review. We do a final walkthrough to make sure everything is perfect, then hand over your keys.
Premium Finishes & Features
Small Footprint Never Means Compromise.
Built on-site at your property using top-notch materials and craftsmanship — custom-built to match your existing home's aesthetic.
Design and Plans Included
Luxury Vinyl Flooring
Quartz Countertops
House Match Options Available
Mini Split Heating and Air System
Open Concept Kitchen
Custom Built at Your Property
Full Permitting
Full Bathroom
Lifetime Composition Shingle Roof
Slow Close Cabinets and Drawers
Appliance Packages Available
Why Boundless Tiny Homes?
Why Choose Boundless Tiny Homes Over a General Contractor?
"General Contractors" treat ADUs as side projects — leading to delays, hidden costs, and poor communication. We're different because we specialize in small homes, ensuring a smooth, transparent, and efficient process from start to finish.
Fast Estimates — No more waiting weeks. Get a solid quote in days.
Transparent Pricing — Everything included — no surprises.
Clear Communication — Stay informed every step of the way.
ADU & Small-Format Specialists — Every square inch matters, and it shows.
You Are Our Priority — Your project won't be pushed aside.
Four commitments
Four Commitments Every Homeowner Can Hold Us To.
Human Warmth in Every Square Foot
A small footprint never means a shed. These are residential rooms, daylight, and finishes a person can live in.
Architectural craft
Local Accountability
One local team designs, permits, and builds. We track the rules in 21 Dane County municipalities in-house.
Radical ownership
Permanent Craftsmanship
Frost-wall foundations, the Wisconsin dwelling code, and a lifetime roof. Built to stay. Starting at $145K.
Enduring permanence
Backed by
A permanent home deserves a permanent promise.
Ten years of structural protection through Quality Builders Warranty, backed by Liberty Mutual. Included in every qualified build.
See Our Warranty
What Homeowners Say
Dane County Homeowners.
Dane County Homeowners.
Real Projects. Real Feedback.
5.0
Verified Google Reviews
If you are thinking about learning more about tiny homes or moving forward to build a tiny home, I can not recommend Boundless Tiny Homes enough. After the initial visit, I knew that Boundless Tiny Homes was not only fantastic to work with but they were committed to making all of my requests possible so my Tiny Home would be perfect for my family and me. Thank you!!!
The fact that they only do ADUs really shows — they knew the Middleton setback rules before we even asked, and the whole permitting process was handled without us lifting a finger. Would not have known where to start otherwise.
I talked to two general contractors before finding Boundless. Both were vague about timelines and pricing. Boundless gave me a detailed breakdown before I signed anything. Six months later I have a detached ADU. Best property investment I’ve made.
Our Work
Built in Madison.
Built in Madison.
Built for Wisconsin.
See If It's Right for You
See If an ADU Is Right for Your Property
Start with a comprehensive ADU feasibility review tailored to your parcel, zoning, and goals — with no ambiguity or hidden costs.
Start Your Free Feasibility Check →
Resources
View All Blogs →
Our Latest Blogs
State of ADUs in Dane County 2026 report
Common Questions
Frequently Asked Questions
Straight answers to the questions we hear most. If yours isn't here, we're one call away.
Do you sell tiny homes?
No. We don't keep finished homes in stock, and we don't sell homes on wheels. Every Boundless tiny home is custom-built on a permanent foundation on your lot.
Where can I place a Boundless ADU?
ADUs can be placed on most single-family and two-family residential lots in Madison and across Dane County. Placement depends on your zoning district, lot size, and setback requirements. We start every project with a feasibility check to confirm what's possible on your specific property.
What things can I customize and design?
We offer customization in layout, exterior siding and trim to match your existing home, interior finishes, and optional upgrades. We'll walk you through the options that make sense for your site and budget during the design phase.
What features come with an ADU?
Every Boundless ADU includes design and plans, luxury vinyl flooring, quartz countertops, mini-split HVAC, open concept kitchen, full bathroom, lifetime composition shingle roof, slow-close cabinetry, and appliance packages available. Full turnkey — no line-item surprises.
What financing is available?
There are several financing paths available for ADU construction, including home equity loans, HELOCs, cash-out refinancing, and ADU-specific construction loans. We can walk you through options and connect you with lenders familiar with ADU projects in Wisconsin.