Grand Duo – 40' + 20' Two-Story Expandable Container Home | 4 Bedrooms | 2 Full Baths | Kitchen, Living, & Rooftop Terrace | ~1,250 SF

Bulk Discounts Available: Save when ordering 4+ units

Big Living, Two Stories

The CHOMEX Grand Duo 40' + 20' Two-Story Expandable Container Home brings full-size living to a compact modular footprint with approximately 1,250 SF of enclosed space across two levels, plus a spacious rooftop terrace.

The first floor features the home's main living areas, including an open living and dining space, kitchen, bedrooms, bathroom, and interior staircase. The second floor adds additional private living space with bedrooms and a full bathroom, while the remaining roof area becomes a large outdoor terrace.

Designed for families, vacation properties, Airbnb investments, guest accommodations, or sites where maximizing usable space is essential, the Grand Duo combines the efficiency of CHOMEX expandable construction with the space and separation of a conventional two-story home.

🏠 Key Features

• 5 Private Bedrooms: Bedrooms distributed across both floors for added privacy
• 2 Full Bathrooms: One bathroom on each level
• Two-Story Design: Maximizes living space without significantly increasing the building footprint
• Central Living & Dining Area: Spacious open layout for everyday living and entertaining
• Full Kitchen: Dedicated kitchen area ready for appliances and storage
• Rooftop Terrace: Large second-floor outdoor living area for dining, lounging, and entertaining
• Interior Staircase: Integrated access between both levels
• Weather-Resistant: Fire-retardant construction and durable exterior materials
• Soundproof & Cozy: Insulated wall system and double-pane windows
• Durable Frame: Anti-corrosion treated steel structure
• Snow Load Capacity: 1.0 kN/m²
• Utility-Ready: Pre-installed electrical, plumbing, and lighting infrastructure

The architectural plans show a full lower level approximately 11.8 m × 6.58 m, with an upper module approximately 5.9 m × 6.58 m and the remaining upper area configured as an open terrace. 

📐 Dimensions

• First Floor: Approx. 38' 9" L × 21' 7" W
• Second Floor: Approx. 19' 4" L × 21' 7" W
• Total Enclosed Floor Area: ~1,250 SF
• Stories: 2
• Ceiling Height: Approx. 8'
• Configuration: 40' lower unit + 20' upper unit
• Outdoor Space: Large second-floor rooftop terrace

🔧 Construction Specifications

• Wallboard: Type 950: 65 mm double-sided 0.3 mm EPS color steel composite panel
• Frame: Electrostatic sprayed protective coating + anti-corrosion treatment
• Folding Hinge: 130 mm galvanized embedded hinge
• Floor: 18 mm bamboo glue board + 4 mm SPC stone plastic flooring
• Main Exterior Roof: Type 950: 50 mm EPS steel composite + 0.45 mm corrugated veneer
• Ceiling Panels: Type 950: 50 mm EPS steel composite
• Wing Roof Panels: Type 950: 65 mm EPS steel composite + 0.45 mm corrugated veneer
• Windows & Doors: Aluminum alloy double-glass windows and steel fire door; optional broken-bridge aluminum
• Electrical: Standard wiring; customizable upon request

These specifications match the construction specification language currently used for the Duo Mod listing. Chomex Homes The supplied electrical drawings specifically indicate provisions for 110V/60Hz and 220V/50Hz circuits, including higher-power 16A 220V outlets. 

🛋 Interior Layout

First Floor

• Open living room
• Dining area
• Full kitchen
• 3 bedrooms
• 1 full bathroom
• Interior staircase

Second Floor

• 2 bedrooms
• 1 full bathroom
• Additional open/flexible space
• Access to rooftop terrace

🚪 Door & Window Details

Doors:

• Security: Zinc alloy steel plate + aluminum frame + smart fingerprint lock
• Entrance: Broken-bridge aluminum + double-layer tempered glass
• Bedroom: Titanium-magnesium alloy frame + sandwich wood board
• Bathroom: Titanium-magnesium alloy + tempered glass

Windows:
Broken-bridge aluminum or aluminum alloy + double-layer tempered glass
Optional plastic steel frame

🚿 Bathroom Details

• 2 full bathrooms
• Shower
• Wash basin
• Mirror cabinet
• Toilet
• UV wall panels
• SPC flooring
• Polyurethane insulated base
• Steel bottom protection
• Fully plumbed for water and sewer connections

🧱 Exterior Wall Panels

• Lightweight yet high-strength
• Cold & heat resistant
• A2 fire protection
• Long-lasting finish with color customization available
• 100% recyclable

🎨 Interior Wall Panel Options

• Beige
• Fine Fabric
• Sub-Gray Country
• Fine Pearl
• Boutique Hot Stamping

🪵 Floor Color Selections

• 4.0 mm SPC Stone Plastic Floor: HY8911, HY8918, HY8920, HY8915, HY8921
• 8.0 mm SPC Stone Plastic Floor: F8581, F8582, F8583, F8585, F8586

🔄 Use Cases

• Primary family home
• Multi-bedroom backyard ADU
• Vacation home
• Vacation rental or Airbnb
• Guest house
• Workforce or staff housing
• Multi-generational living

🛠 What’s Included

• 40' expandable main-level modular unit
• 20' expandable second-level modular unit
• Structural system for two-story configuration
• Rooftop terrace and railing system
• Interior staircase
• Pre-installed windows & doors
• Pre-framed 4-bedroom interior
• 2 full bathrooms
• Full kitchen area
• Installed wiring & plumbing infrastructure
• Technical documentation including floor plans, elevations, and electrical plans

🛠 Customization Available

Looking for a different bedroom configuration, exterior finish, or interior layout?

CHOMEX units can be customized with different flooring, interior and exterior wall finishes, doors, windows, kitchen configurations, bathroom finishes, and other options.

Contact CHOMEX for custom configurations or volume orders.

Shipping & Delivery

Free nationwide delivery across the continental U.S. via flatbed or tilt-bed trucks.

Crane service available at additional cost.

Lead Time: 6–8 weeks

⚠️ Check local zoning, foundation, structural, and permitting requirements before purchase. Two-story installations may require additional site-specific engineering and approvals.

Warranty

• 3-Year Structural Warranty
• 3-Year Electrical & Plumbing Parts Warranty

Order Process

1. Select layout & quantity
2. Choose finishes and customization options
3. Confirm details within 72 hrs
4. Production & delivery in 6–8 weeks
5. Receive, install, connect utilities, and move in