If you are evaluating a Custom 700 Wide Dual Wing Expandable House, I recommend treating the “700 wide” description as a model or dimensional reference that must be confirmed on the supplier’s approved drawing. The most important purchasing questions are the folded and expanded dimensions, usable interior area, wing-opening method, structural materials, shipping configuration, site requirements, and installation scope. At Hongshun Guangju, I help B2B buyers turn these requirements into a clear technical and commercial specification before production begins.
A dual-wing expandable house is a prefabricated modular building that is transported in a compact folded condition and opened on site to create a wider interior footprint. The two side wings normally expand from the central structural body, providing more floor area than a conventional fixed-width container-style unit. Because the final dimensions and configuration vary by project, I advise buyers to confirm every measurement in millimetres rather than relying only on a product name.
This guide is designed for distributors, contractors, real estate developers, temporary accommodation providers, project owners, and government or institutional procurement teams. It is also useful for buyers sourcing multiple units for worker accommodation, site offices, classrooms, clinics, retail facilities, or emergency-use buildings. I focus on practical decisions that affect quotation accuracy, logistics, installation, and long-term use.
The guide is especially relevant when you need a custom 700 wide dual wing expandable house rather than a standard catalogue unit. Customization can influence the structural layout, doors and windows, insulation, electrical system, plumbing, interior finishes, and packing method. These details should be resolved before the supplier issues a final production price.
The phrase “700 wide” can describe a product series, a folded width, an expanded width, or a shorthand used in a supplier catalogue. I do not recommend assuming that it means 700 millimetres, 7,000 millimetres, or another measurement without reviewing the technical drawing. For example, a buyer may request an expanded external width of 7,000 mm, but that figure should be treated as a project requirement until the manufacturer confirms whether it applies to the external frame, roof edge, or usable floor area.
Ask for a dimension sheet showing the folded length, folded width, folded height, expanded length, expanded width, internal ceiling height, floor area, and transport weight. The same document should identify which dimensions include roof overhangs, steps, handrails, or external equipment. This prevents a common problem in international sourcing: the quoted product appears to match the requirement, but the usable area or shipping envelope is different.
Most expandable houses use a steel structural frame combined with insulated wall, roof, and floor panels. However, the actual steel grade, coating, panel core, thickness, flooring, windows, doors, and weatherproofing method must be specified in the quotation. Depending on the climate and application, buyers may evaluate EPS, rock wool, or other insulated panel solutions, while fire performance, thermal performance, acoustic control, and local building rules may influence the final selection.
I recommend separating standard features from optional upgrades. Standard items may include the main frame, foldable wings, wall panels, roof system, basic doors and windows, and an electrical distribution arrangement. Options can include bathrooms, kitchens, furniture, air-conditioning provisions, solar readiness, enhanced insulation, exterior cladding, ramps, stairs, and customized branding.
The best layout depends on how people will occupy and operate the building. A site office may need an open workspace, meeting area, storage, and a compact restroom, while accommodation may require sleeping rooms, a living area, a kitchen, and private or shared bathrooms. A classroom or clinic may need clear circulation, controlled access, lighting zones, ventilation, and easy cleaning surfaces.
Before requesting a drawing, I suggest preparing a simple room schedule. List each room, its approximate floor area, number of occupants, furniture dimensions, door position, window preference, plumbing points, and electrical loads. This information gives the supplier a practical basis for proposing a layout rather than merely changing partition positions.
A practical layout often divides the building into two or three functional zones, such as public, private, and service areas. This is a planning approach rather than a fixed product specification. I can work from a hand sketch, CAD file, room schedule, or reference image, but the final layout should be approved against the structural and transport drawings.
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The folded unit is generally more efficient to transport than a fully assembled building, but the actual logistics depend on the folded dimensions, weight, lifting points, destination regulations, and packing method. A 20-foot container may be relevant for some configurations, but I would not confirm container loading until the supplier provides a packing list and loading plan. Buyers should also check port handling, inland delivery, customs documentation, crane or forklift access, and temporary storage requirements.
Ask for the gross weight, centre-of-gravity information where available, lifting instructions, and the number of packages or auxiliary components. If the shipment includes stairs, sanitary fixtures, furniture, external platforms, or electrical accessories, these items should be listed separately. A complete shipping review reduces the risk of unexpected local handling charges.
A dual-wing expandable house normally requires a level and adequately supported base before opening. The appropriate foundation may be a concrete slab, strip foundation, piers, steel supports, or another engineered solution, depending on soil conditions, local regulations, building weight, wind exposure, and the project’s intended duration. I recommend having the site engineer verify the foundation before delivery rather than adapting an uneven site after arrival.
Installation typically includes positioning the folded unit, lifting or placing it, opening the wings, securing structural connections, installing external seals and accessories, connecting utilities, and checking doors, windows, floors, and drainage. The exact sequence varies by design. A simple installation schedule should identify the required personnel, lifting equipment, tools, power supply, weather conditions, and inspection points.
| Evaluation Area | Questions to Confirm | Why It Matters |
|---|---|---|
| Dimensions | What are the folded and expanded dimensions in mm? | Confirms site fit, usable space, and transport feasibility. |
| Structure | What frame, joints, corrosion protection, and load assumptions are used? | Supports project engineering and environmental review. |
| Envelope | What panel core, thickness, roof detail, and sealing method are included? | Influences thermal, acoustic, moisture, and fire-related performance. |
| Services | Are electrical, plumbing, HVAC, and sanitary systems included? | Prevents omissions and unclear installation responsibilities. |
| Commercial terms | What are the MOQ, lead time, packing method, warranty scope, and payment terms? | Improves budget control and project scheduling. |
The price of a custom expandable house is affected by size, materials, internal partitions, fittings, quantity, destination, packaging, and required documentation. I recommend requesting a line-item quotation that separates the base structure, customization, interior fit-out, electrical and plumbing systems, accessories, packing, and shipping-related charges. This makes it easier to compare suppliers on an equivalent scope.
Minimum order quantity and lead time should be confirmed for the specific configuration, not copied from a standard model. A single prototype may require a different engineering and production process from a batch order. Before approving production, request the final drawing, bill of materials, colour schedule, packing list, inspection arrangement, and responsibility matrix.
One frequent mistake is comparing only the advertised floor area while ignoring the folded transport size and installation clearance. Another is approving a floor plan without checking furniture, plumbing routes, utility connections, and door swing directions. Buyers also sometimes assume that a standard electrical system is automatically suitable for the destination market, even though voltage, frequency, plug type, protection devices, and inspection requirements may differ.
It is also important not to treat a rendered image as a technical promise. I recommend requiring written confirmation of materials, dimensions, included accessories, structural details, packaging, and after-sales responsibilities. If the project is subject to local planning or building controls, the purchaser should arrange the necessary review with qualified local professionals.
At Hongshun Guangju, I approach the Custom 700 Wide Dual Wing Expandable House as a project specification rather than a simple stock item. My team can review your intended use, room schedule, target dimensions, climate, utility requirements, destination, and quantity before recommending a configuration. We can then coordinate drawings, customization details, production communication, packing information, and export preparation according to the confirmed scope.
For an efficient quotation, send the target folded and expanded dimensions, application, number of occupants, preferred layout, insulation expectations, electrical standard, sanitary requirements, delivery country, and estimated order quantity. If you already have a site plan or reference drawing, include it with the inquiry. The more clearly the requirements are defined, the easier it is to identify practical options and avoid late-stage changes.
In conclusion, a Custom 700 Wide Dual Wing Expandable House can be a practical solution when you need transportable space with a wider on-site layout, but the purchase decision depends on verified drawings and clearly assigned responsibilities. My recommended next step is to send Hongshun Guangju your dimensions, application, layout requirements, destination, and quantity so we can prepare a project-specific technical review and quotation. This process gives you a more reliable basis for budgeting, logistics planning, installation, and final supplier selection.
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