Bright Box Homes
20x20 Expandable Home
400 sq ft in your choice of 1, 2, or 3 bedroom layouts.
Starting at $45,995
The 20x20 is our most versatile expandable home - 400 sq ft of finished living space available in one-, two-, or three-bedroom layouts. Built on a galvanized steel frame with expandable side sections, it works equally well as a primary residence, rental, or multi-room ADU. Every unit ships standard with a mini-split HVAC system, tankless water heater, induction kitchen, and a covered front porch, with 60+ RAL exterior colors to choose from.
- Induction stove with range hood
- Walk-in shower with fixtures
- Tankless water heater
- 24,000 BTU mini-split HVAC
- Covered front porch with railing
- Washer/dryer hookups
- Garbage disposal
- Dual-pane windows throughout
- Upgraded 125-amp electrical panel
- 60+ RAL exterior color choices
Our flagship line and best value: steel-frame homes that ship compact and unfold on site into fully finished living space. Every Bright Box expandable home arrives move-in ready with a complete kitchen, full bathroom, climate control, and a covered porch - then customizes to your taste with 60+ exterior colors and a full range of interior finishes. Whether it's your first home, an income property, or a backyard ADU, it delivers real-home comfort at a fraction of traditional construction cost.
Exterior
See It From Every Angle
Interior
Take a Look Inside
Key Features
Built to a Higher Standard
Galvanized Steel Frame
Built on the same rugged steel structure as shipping containers - engineered to last decades.
Climate Controlled
24,000 BTU 20 SEER mini-split HVAC keeps every room comfortable year-round.
Full Kitchen & Bath
Tankless water heater, induction stove, walk-in shower, and garbage disposal - standard.
60+ Color Options
Choose 60+ RAL exterior colors plus customizable interior walls, floors, and cabinets.
Move-In Ready Wiring
Upgraded 125-amp panel with 110V, 240V, and GFCI outlets pre-installed throughout.
Covered Front Porch
Every model ships with a covered porch and railing - usable outdoor space from day one.
Who It's For
One Home, Many Possibilities
Primary Residence
Full-time, full-comfort living at an affordable price point.
Vacation Home
A turnkey getaway for the lake, mountains, or rural acreage.
Airbnb Rental
A photogenic, income-producing short-term rental unit.
ADU / Guest House
Extra living space for family, guests, or a home office.
Floor Plans
Choose Your Layout
Upgrades
Customize Your Home
Solar & Power
Solar-Ready Package
8kW Solar Kit
10kW Solar Kit
Generator-Ready Package
15kW Portable Generator
18kW Whole House Generator
22kW Whole House Generator
HVAC & Comfort
9,000 BTU Mini-Split
24,000 BTU Mini-Split
Whole House Radiant Heating
Ceiling Mount Air Mover
Kitchen
Top Kitchen Cabinets (one side)
Top Kitchen Cabinets (two sides)
Bottom Kitchen Cabinets
4-Burner Induction Stove
3/4 HP Garbage Disposal
Kitchen Cabinet Color Options
Bathroom
Modular Shower Enclosure
Upgraded Bathroom Vanity
Tankless Water Heater (wall-mount)
Bathroom Wall Design / Colors
Bathroom Exhaust Fan
Laundry
Stackable Washer / Dryer
Washer & Dryer Rough-In
Exterior
Metal Roof & Truss System (20' and 40')
Reinforced Truss for Solar
Covered Side Porch
Side Deck
Front Porch Railing Color
Front Porch Deck Color
Exterior House Colors
Carved Metal Plate Exterior
Electrical
200 Amp Service Panel
Additional 110V Outlets
240V Outlets
GFCI Outlets
Dimmer Switches
TV Wall Mount
RG-6 Coaxial
Interior
3" Rockwool Insulation Upgrade
Interior Flooring Colors
Interior Trim Colors
Interior Wall Bamboo Wood Fiber Board
Double-Pane Low-E Windows
Standard Rear Door
Rear Sliding Door
Structural
Additional Bedroom (40' & 20' houses)
Full Metal Roof with Truss System
Specifications
- Footprint
- 20' x 20'
- Area
- ~400 sq ft
- Layouts
- 1, 2, or 3 bedroom
- Frame
- Galvanized steel
- Roof
- 24-gauge corrugated metal
- HVAC
- 24,000 BTU mini-split
- Water Heater
- Tankless
- Exterior Colors
- 60+ RAL options
- Price
- $45,995
Construction & Frame
Ready to Reserve?
Secure your home with a fully refundable $500 deposit. We'll contact you within 24 hours to finalize your configuration.
100% refundable · No obligation · Locks your configuration