Model B-506 · Single-Level

About This Model

At 506 square feet, the B-506 crosses a threshold where the space genuinely lives like a small home rather than a very efficient apartment. The dining nook is a detail that matters for day-to-day life — a place to eat that isn’t the couch or the kitchen counter. The extra bathroom size accommodates accessible features (wider door, grab bar blocking) if the ADU is being built for a parent. The B-506 rents in the same range as the larger B-625 but has a meaningfully smaller footprint, which makes it viable on more lots.

Ideal For

Long-term tenant or family use, premium 1-bedroom rental at a mid-size footprint.

Interior Photo

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

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Floor Plan / Elevation — B-506

Floor Plan

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

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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 B-506 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 B-Series plan is a starting point on your lot. Compare the rest of this series, or view all models.