The Tandem
A complete home above a garage built for two.
A two-bedroom, one-bath ADU above a tandem two-car garage, with a private exterior stair, a full kitchen and upstairs laundry.
Sq ft
800
Beds
2
Baths
1
Stories
2

The home
The Tandem at a glance
The Tandem makes a deeper lot work harder. Its upper apartment brings together open living, four-place dining and a complete kitchen, with two queen bedrooms at the quiet end of the plan. A stacked laundry pair and separate linen storage sit beside the bathroom. Below, two cars park in line, leaving space for a courtyard-end workbench, storage and a separate service room. A timber stair provides an independent apartment entrance. Warm off-white siding, a brick-look base and wood accents give the alley-facing exterior its character. Tandem parking requires moving the alley-side car before the inner car can leave; final vehicle fit and lot placement are developed for the site.
- Two queen bedrooms and one full bathroom
- Approximately 800 sq ft gross apartment above a separate garage
- Tandem two-car parking, storage and a workbench
- Private exterior stair and apartment entrance
- Complete kitchen and four-place dining
- Stacked laundry and separate linen storage
- Warm off-white siding, brick-look base and wood accents
| Model code | MBS-ADU-800 |
|---|---|
| Type | ADU |
| Bedrooms | 2 |
| Bathrooms | 1 full |
| Stories | 2 |
| Gross upper residence area | 800 sq ft |
| Footprint | 17 ft × 47 ft 1 in |
Fixed factory price, valid 30 days
How it's built
The Tandem, built with panelized construction
MBS builds The Tandem from factory-made wall panels, floor cassettes and roof panels, CNC-cut in our St. Louis plant to the approved drawings. Panels ship flat and are set on a conventional foundation. The finished ADU is wood framing, not a modular box or a manufactured home, with a 50% quicker construction schedule.
Pick your package
Framing only, open or sheathed panels, or closed panels with windows, cladding and MEP rough-in.
Keep your crew
Your framer sets the panels, or MBS coordinates installation with your GC.
Fixed price, standard trucks
A fixed factory price, valid 30 days, with freight included within 1,000 miles of St. Louis.
Renderings
Inside and out
Exterior
Interior
Living spaces
Kitchen and dining
Bedrooms
Bathrooms
Laundry, storage and utility
Garage
Concept renderings. Furniture, materials and finishes are illustrative.
Floor plans
Plans and furnished 3D models
Ground floor
Tandem garage
Upper floor
Two-bedroom apartment
Approximately 800 sq ft gross upper residence, including walls. The separate garage and exterior stair are additional. The 17 × 47 ft 1 in building envelope increases to about 21 ft 6 in across the exterior stair, before finishes and site setbacks. Concept areas are not certified net living or appraisal areas.
Price this plan
Build The Tandem on your lot
Send your site address and timeline. We return a fixed factory price, valid for 30 days, with freight included within 1,000 miles.

