Built Work / North Side Single-Story ADU
Completed single-story ADU exterior — dark siding, timber-frame covered patio, blue sky — North Side Madison, WI | Boundless Tiny Homes
Single-Story ADU All Projects

Single-Story ADU — North Side, Madison

625 sq ft ADU Size
4 months Foundation to CO
On budget Cost Outcome
1 bed / 1 bath Program
Madison, WI Location
The Starting Point

A specialist was the requirement from day one.

He wasn’t looking for a general contractor. He was looking for someone who specialized in smaller homes and ADUs — and that’s exactly how he found Boundless Tiny Homes.

That specialization mattered to him from the beginning. When your project is a single-story ADU and tiny home, you want a builder for whom that’s the core work — not a side job between larger commercial builds.

The Site

Standard on paper. Important to get right.

The lot on Madison’s north side had a couple of realities to work through.

Setbacks placed the build about four feet from the lot line. A grade change across the site required managing water runoff — we installed swales to direct drainage toward the street and away from the structure and neighboring lot.

We didn’t just position the unit where it fit. We positioned it where it fit and left a clear corridor for a future driveway and garage addition when the time comes.

That’s not an afterthought — it’s designing for the long view, not just the current project.

The Design

625 square feet that lives larger than it measures.

At 625 square feet, every design decision carries weight. The goal was a space that lives larger than its footprint suggests.

Vaulted ceilings were an intentional move in that direction. Raise the ceiling plane in a compact single-story and the entire feel of the space changes — more air, more light, more room without adding a single square foot of floor area.

The archway was the client’s request. He had lived in a home earlier in his life that had one. He wanted that detail carried into this one — a design element that connected back to a specific season of his life.

It’s a small thing on a set of drawings. It meant something to him. Those are the details that turn a well-built structure into a home.

The Finished Interior

Everything on the drawings. Nothing missing.

The vaulted ceiling opens the living area in a way a standard flat ceiling never would at this footprint. Dark LVP flooring runs the full length of the unit. The archway from the living area into the hallway is trimmed cleanly — not a pass-through, a detail.

Mini-split handles heating and cooling without the ductwork a forced-air system would require in a single-story this size. The timber-frame covered patio out back extends the usable space through three Wisconsin seasons.

Finished living area — vaulted ceiling, custom archway to hallway, mini-split, slider to covered patio — North Side ADU Madison WI
Living area — vaulted ceiling, archway to hallway, slider to covered patio
Living area looking toward open kitchen — dark LVP, fan, mini-split — North Side ADU Madison WI
Open plan — living area looking toward kitchen
Living area from entry side — craftsman door, clerestory window, slider — North Side ADU Madison WI
Entry side — craftsman door, clerestory window, slider to patio
Kitchen with stainless appliances, wood cabinets, craftsman side entry — North Side ADU Madison WI
Kitchen — stainless appliances, wood cabinetry, craftsman side entry
Bedroom with closet, fan, clerestory window — North Side ADU Madison WI
Bedroom — closet, black hardware, clerestory window
Hallway with craftsman doors and archway back to living area — North Side ADU Madison WI
Hallway — craftsman doors, archway back to living area
Secondary room with multiple windows and mini-split — North Side ADU Madison WI
Secondary room — natural light on three sides, mini-split
Walkthrough

See the finished unit.

Every room, the covered patio, the archway detail — completed and move-in ready.

The Build

Slab poured in October. Certificate of occupancy in December.

Wall panels went up the first week of October. Interior framing and trusses followed within days — the structure needed to be enclosed before Wisconsin weather turned. It was.

Crew raising first wall panels off slab — day one framing, North Side ADU Madison WI, October 2025
Day one — first wall panels off the slab, October 6
Full interior framing with vaulted truss system — North Side ADU Madison WI, October 2025
Interior framing — full truss run, rooms taking shape, October 10
Interior framing with vaulted trusses and plumbing rough-in on slab — North Side ADU Madison WI
Trusses set, plumbing rough-in underway — the vault that would define the finished space
Exterior framing with housewrap and crew setting trusses — North Side ADU Madison WI, October 2025
Exterior wrapped, trusses going up — October 10
Roof on and windows set with fall foliage — North Side ADU Madison WI, October 2025
Roof on, windows set — fully enclosed before winter, October 14
Drywall stage — living area with archway formed and vaulted ceiling — North Side ADU Madison WI
Drywall stage — archway formed, vaulted ceiling taking shape
Drywall living area wide view showing hallway and archway detail — North Side ADU Madison WI
Drywall complete — full living area, hallway, archway detail
How We Run the Job

Utility delays don’t stop the job. They redirect it.

Electrical utility coordination introduced delays — a recurring reality in this market that no builder controls. We didn’t treat it as a reason to stop.

We brought in temporary heaters to maintain a workable temperature inside the structure, pushed through drywall, and kept the interior finish work moving. When utility service was finally established, we weren’t pausing construction. We were wrapping it up.

Finished ADU exterior in winter — dark siding, timber porch, blue sky — North Side Madison WI, December 2025
Finished exterior — December, blue sky, timber-frame covered patio complete
Near-complete ADU exterior with first snow — dark siding, gable porch — North Side Madison WI
Near-complete exterior — first snow of the season
The Outcome

Foundation to certificate of occupancy in four months.

A 625-square-foot, one-bedroom, one-bath ADU with vaulted ceilings, a custom archway, a timber-frame covered patio, and a yard deliberately laid out to accommodate a future garage — built on budget and on schedule despite conditions that had every reason to stretch the timeline.

The space is exactly what he asked for. Designed around his life, his history, and where he’s headed next.

4mo Foundation to occupancy
On Budget — no overruns
625 Sq ft delivered
+1 Future garage planned

Exploring an ADU or tiny home in Madison, WI or Dane County?
ADUs are all we do. Schedule a consultation and find out what working with a specialist actually looks like.