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B2-800 ADU exterior in light colorway
B2-800 ADU exterior in dark colorway
B2-800 floor plan
Exterior:

B2-Series · Two-Story

Model B2-800 · Two Stories, Two Bedrooms

About This Model

The B2-800 gives you two real bedrooms without giving up the backyard. It builds up instead of out. Downstairs, the living and kitchen space opens through a sliding glass door to the yard, with a half bath and laundry tucked under the stair. Upstairs, two bedrooms and a full bath sit a floor away from the living space, so late nights and early mornings don't collide. The saltbox roof gives it a classic profile beside the main house. On a Madison or Dane County lot, the footprint and two-story height have to clear coverage and height limits before design starts. We check that first.

Ideal For

  • Families who need two bedrooms on a small or narrow lot.
  • Grown kids or caregivers who want their own floor to sleep on.
  • Owners who want a two-bedroom rental with a small footprint.

Specifications

Living area800 sq ft (400 L1 + 400 L2)
Bed / bath2 bed / 1.5 bath
Footprint16' × 25'
Stories2 stories
Garageno garage
Interior Photo
B2-800 interior

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

VIEW INTERIOR GALLERY →
Floor Plan / Elevation — B2-800
Floor Plan
B2-800 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 B2-800 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.

B2-800
B2-Series · Two-Story
2Bed
1.5Bath
800sqft
ADU Overview
800 sq ft. Two bedrooms, one and a half baths. Open living, kitchen, and half bath downstairs. Bedrooms and full bath upstairs. Saltbox roof.
Check If This Fits Your Lot →
or call us directly
608-400-0121 VIEW ALL MODELS