Model G-620 · Above a New Garage

About This Model

The G-620 is the garage ADU model most commonly built by clients who want to maximize the use of their backyard structure — parking that they need, plus a rental or family ADU above it. At 620 square feet, the ADU level is comparable in size and livability to our B-625 model, which is the most popular standalone ADU in the lineup. The combined structure footprint is larger than a standalone ADU but smaller than two separate structures, which helps on lots where overall impervious surface coverage is a constraint. The G-620 is the 620 sq ft 1-bedroom above a new detached garage.

Ideal For

Clients who need parking plus a full 1-bedroom rental ADU, lots with setback constraints better suited to a single two-story structure.

Interior Photo

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

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Floor Plan / Elevation — G-620

Floor Plan

Elevation

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 G-620 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 G-Series plan is a starting point on your lot. Compare the rest of this series, or view all models.