Completed ADU with covered timber patio — Boundless Tiny Homes, Madison WI
Dane County's ADU Specialists

Built On-Site.
Built to Last.

We're Dane County's only ADU-focused design-build firm. We design, permit, and build accessory dwelling units — start to Certificate of Occupancy. One firm, one contract, one point of contact.

Whether you need a detached unit, an attached addition, or an ADU above a new garage — ADUs are not a side project for us. They are all we do.

Start a Free Feasibility Check →
#1
ADU Design-Build Firm in Dane County
15+
Years of Industry Experience
100%
ADU Focused — This Is All We Do
CO
Every Project to Certificate of Occupancy
The Boundless System

Turnkey ADU — Start to Certificate of Occupancy

We take care of everything, from start to finish. With a Boundless ADU, there are no hidden fees or bait-and-switch tactics. We believe in transparency.

01
Turnkey Construction
We begin with the design phase, crafting plans and blueprints tailored to your property and goals. We handle permitting, construction management, and final inspection — one firm, one contract, one point of contact from start to CO.
02
High-Quality Materials
Every Boundless ADU comes standard with premium materials — quartz countertops, luxury vinyl flooring, slow-close cabinetry, lifetime composition shingle roofs, and all appliances included. No allowances, no surprises at the end.
03
Full Transparency
We don't provide estimates without walking you through every line item. You see the full number before you sign anything. Our contracts are fixed-price, and our process is documented so you know exactly where your project stands at every phase.
Local Knowledge

Can I Build an ADU in My Town?

While Madison's laws have made it much easier to add an ADU, each municipality operates with its own set of requirements. We know the zoning codes across Dane County — setbacks, size limits, owner-occupancy rules — in detail.

Select your municipality to see current ADU regulations, or start with a free feasibility check to get a definitive answer about your specific property.

Check ADU Regulations → Free Feasibility Check →
Our Build Process
5 phases, start to CO
→
Why Boundless?
ADU specialist vs. general contractor
→
Understanding Pricing
What's included, what costs what
→
ADU Calculator
Estimate your monthly payment
→
Interior Gallery
See inside a Boundless ADU
→
FAQs
Common questions answered
→
Ready to Start?

Find out what's buildable on your property.

The feasibility check is free. We review your address, zoning, and lot — and give you a clear picture of what's possible.

Get a Free Feasibility Check →