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B2-480 ADU exterior in light colorway
B2-480 ADU exterior in dark colorway
B2-480 floor plan
B2-480 elevation
Exterior:

B2-Series · Two-Story

Model B2-480 · Two-Story

480 sq ft across two floors — a 1-bedroom ADU for tight urban lots, with living below and sleeping above so the yard stays open.

About This Model

The B2-480 is a two-story 1-bedroom ADU: 480 square feet across two floors, for tight urban lots where a single-level plan would take the yard. Living, kitchen, and bath sit downstairs. The bedroom sits upstairs. Vertical living keeps open ground for the garden and the primary house. The B2 kitchen has more counter run than the original B-series, and the windows are placed for daylight in the downstairs rooms. Appliance packages are available and are not part of the base price.

Ideal For

Tight urban lots that need a two-story 1-bedroom so the backyard stays open.

Interior Photo
B2-480 interior

Representative interior photo. Finishes and layout vary by model and project configuration.

VIEW INTERIOR GALLERY →
Floor Plan / Elevation — B2-480
Floor Plan
B2-480 floor plan
Elevation
B2-480 elevation
Facade Upgrade Options
B2-480 facade upgrade

Facade upgrade options available. Ask about exterior cladding, window configurations, and color packages during your consultation.

Premium Finishes & Features

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Full Turnkey Construction & Residential Finishes
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Design and Plans Included
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Luxury Vinyl Flooring
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Quartz Countertops
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House Match Options Available
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Mini Split Heating and Air System
✓
Open Concept Kitchen
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Custom Built at Your Property
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Full Bathroom
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Lifetime Composition Shingle Roof
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Slow Close Cabinets and Drawers
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Appliance Packages Available

Frequently Asked Questions

Where can I place this ADU?+
The B2-480 can be placed on most single-family and two-family residential lots in Dane County, subject to setback, size, and zoning requirements for your municipality. We confirm feasibility at your address during the free feasibility check.
What can I customize?+
Exterior siding color and material, roofing color, interior paint, cabinet hardware, light fixtures, and appliance packages. The structural layout is fixed per model; finish-level personalization is fully available.
What features come standard?+
Every Boundless ADU includes full permitting, architectural plans, mini-split HVAC, quartz countertops, luxury vinyl flooring, slow-close cabinetry, and a lifetime composition shingle roof. Appliance packages are available and are not assumed in the base price.
What financing options are available?+
Common paths include HELOCs, cash-out refinancing, construction-to-permanent loans, and ADU-specific products. See our financing page or try the ADU calculator.
Other Models

Every B2-Series plan is a starting point on your lot. Compare the rest of this series, or view all models.

B2-600 ADU exterior in dark colorway
B2-600
1 Bed · 1 Bath · 600 sqft
B2-800 ADU exterior in dark colorway
B2-800
2 Bed · 1.5 Bath · 800 sqft
B2-480
B2-Series · Two-Story
1Bed
1Bath
480sqft
ADU Overview
Two-story 1-bedroom on a tight lot. Living below, sleeping above, backyard left open.
Check If This Fits Your Lot →
or call us directly
608-400-0121 VIEW ALL MODELS