An expandable container house is a transportable building unit that opens at the destination. For a project buyer, the important question is not only which size is available. It is whether the folded unit, expanded layout, lifting plan, utility package, and local approval basis match the site. Sinomega lists 20ft and 40ft Expansion Box options, with optional bathroom, kitchen, and electrical systems. This guide shows what to compare before requesting a quotation.
Author: Sinomega House Technical Team | Published: August 17, 2026
What the expandable format changes
The Expansion Box uses guide rails and folding rods to open from a compact shipping form into a usable room or project module. The folded and occupied forms have different planning requirements:
- Freight planning uses folded dimensions, unit weight, packing quantity, and unloading equipment.
- Site planning uses expanded dimensions, bearing conditions, drainage, access, and clearances.
- Operations planning uses the interior layout, electrical and sanitary scope, inspection points, and relocation method.
Sinomega states that three sets can be packed per 20ft container and that the product is reusable more than 50 times. These are website or brochure claims. Confirm them for the selected configuration, shipment, and operating conditions before they are used in a contract or logistics booking.
20ft versus 40ft selection
| Procurement question | 20ft option | 40ft option |
|---|---|---|
| Access and phasing | Suits restricted routes, smaller plots, or phased delivery | Requires a route and lifting plan that can handle the longer module |
| Layout planning | Works for a compact office, room, or service unit | Allows a broader plan when the expanded dimensions are confirmed |
| Camp deployment | Useful for repeated small modules and staged occupancy | Can reduce interfaces when a larger room arrangement is required |
| Freight assumption | Three sets per 20ft container is a stated planning claim; verify the final packing list | Request the exact container count, gross weight, and loading diagram |
| Relocation | Confirm folding sequence, lifting points, and storage protection | Confirm route clearance, turning radius, and handling equipment |
Size alone does not define floor area, occupancy, weight, or compliance. Ask for a configuration-specific drawing and bill of materials before comparing supplier quotations.
Match the layout to the project use
Sinomega lists expandable units for campsites, military barracks, earthquake-relief buildings, temporary offices, and emergency housing. The same structural format can support different workflows:
Workforce accommodation
Set the occupancy target, sleeping arrangement, sanitary ratio, ventilation, power distribution, and cleaning access. If bathrooms or kitchens are required, list them as optional systems with their own utility interfaces.
Temporary office
Define workstations, meeting space, storage, lighting, data routes, air-conditioning provisions, and a handover checklist. A compact unit can be practical when the project needs several repeatable offices rather than one large building.
Emergency or relief deployment
Prioritise packing sequence, opening time, site access, foundation conditions, drainage, local electrical rules, and replacement parts. A rapid folding system does not remove the need for a safe prepared site and a documented inspection.
RFQ information buyers should provide
Send the following information with the first request for quotation:
- Quantity, preferred 20ft or 40ft format, intended use, occupancy, and expected reuse or relocation cycle.
- Destination country, delivery point, access limits, unloading equipment, and target delivery phase.
- Room schedule, doors and windows, bathroom or kitchen requirements, furniture scope, finishes, and branding.
- Electrical supply, voltage and frequency, plumbing interfaces, HVAC expectations, and fire-safety requirements.
- Site bearing and drainage information, foundation concept, wind and seismic design criteria, snow or temperature exposure, and approval requirements.
- Required drawings, packing list, installation instructions, inspection records, export documents, warranty terms, and after-sales process.
This brief lets the manufacturer separate standard catalogue details from project-specific engineering. Final price, lead time, expanded floor area, foundation design, utility interfaces, and destination-code compliance are quotation-stage items and should not be assumed.
Packing and installation checks
Before shipment, request a packing diagram, folded dimensions, gross and net weights, centre-of-gravity information, lifting points, and the number of units per container. At the site, confirm level bearing, drainage, temporary works, crane or forklift access, and utility isolation.
For repeated deployment, request a numbered opening and closing sequence and record inspection points for rails, folding rods, fasteners, seals, panels, doors, and service connections. Add storage and corrosion-protection instructions to the handover package. These controls matter more than a catalogue slogan when a unit will be moved several times.
Compliance questions that need documents
The product information refers to fire-resistant insulation panels, but a buyer still needs the applicable fire classification and test documentation for the selected panel system. The same rule applies to wind load, seismic design, waterproofing detail, thermal performance, electrical safety, and sanitary systems.
Ask Sinomega to identify which values are standard, which are optional, and which require engineering confirmation. Have the design reviewed against the destination country's building, fire, electrical, and sanitary rules. Do not describe a unit as fireproof, earthquake-proof, waterproof, or code-compliant without product-specific evidence and local review.
Quotation review checklist
Compare offers line by line. The commercial comparison should show the model and size, folded and expanded dimensions, steel and panel system, openings, interior finish, optional systems, packing quantity, weights, installation scope, documents, warranty, delivery terms, and exclusions. Record every deviation from the requested layout. Review Sinomega's container-house project examples to identify layout and deployment questions for the RFQ, without treating a previous project as a guarantee of the same result.
The expandable container house product page is the starting point for the product scope. For drawings, shipping data, optional systems, and a project-specific offer, use the Sinomega contact page.
FAQ
Does Sinomega offer 20ft and 40ft expandable container houses?
Yes. Sinomega's available product information lists both formats. Confirm the exact folded and expanded dimensions, weight, layout, and packing list for the selected configuration.
What is the price of an expandable container house?
Sinomega's public product information does not list a verified price. Price depends on size, quantity, layout, optional systems, finish, shipping route, and project documentation. Request a quotation based on a complete RFQ brief.
How many units fit in a container?
Sinomega states that three sets can be packed per 20ft container. Treat this as a planning claim and confirm the final loading diagram, dimensions, and weights before booking freight.
Can the units be reused?
The product information states reuse more than 50 times. Confirm the assumptions, inspection requirements, maintenance process, and warranty terms for the selected model and relocation cycle.
Are foundations and local approvals included?
They must be confirmed for the project. Foundation, utilities, fire requirements, and destination-code compliance depend on the site and jurisdiction and belong in the engineering and quotation package.
