700mm Double Wing Expandable House: A Buyer’s Guide to Specifications, Layout, and Installation
A 700mm Double Wing Expandable House is a transportable building designed to open outward on two sides, creating more usable interior space than its folded configuration. The “700mm” in a product name is not enough to establish the complete dimensions or confirm whether it refers to each wing, a specific extension, or another specification. Before comparing prices or arranging a site, ask the supplier to define this measurement on a dimensioned drawing and confirm the folded and deployed sizes in writing.
This guide explains what B2B buyers should check when assessing specifications, planning a layout, preparing a site, and comparing suppliers. At Hongshun Guangju, we recommend evaluating the complete package—not just the product name—including structure, finishes, utilities, transport, installation scope, and project requirements. The guidance below is intended to support procurement decisions; final specifications should be confirmed against the supplier’s approved drawings and applicable local requirements.
Key Takeaways
- Confirm exactly what “700mm” measures; do not assume it describes the total expanded width.
- Request folded and deployed dimensions, floor plans, structural details, and utility information before approval.
- Match the layout and finish package to the building’s intended use, climate, site, and local requirements.
- Agree in writing on the delivery boundary, installation responsibilities, lead time, and included items.
Who This Guide Is For
This guide is for contractors, developers, project managers, distributors, and procurement teams evaluating expandable accommodation or site facilities. It is particularly relevant when a project needs transportable space that can be expanded after delivery. Buyers comparing offers from multiple factories can also use the checklist to distinguish confirmed specifications from assumptions.
Understanding the 700mm Double Wing Expandable House
What the product name tells you—and what it does not
“Double wing” describes a configuration in which two side sections open from a central structure. In the closed position, the unit is intended for transport; after deployment, the side sections contribute to the usable floor area. The stated 700 mm is a dimension in the product name, but buyers should not infer its measurement reference, direction, or effect on the final footprint without a drawing.
Ask for a dimensioned plan showing the closed and open configurations. The drawing should identify the central section, both wings, overall exterior dimensions, interior clearances, door and window positions, and any steps or projections. Request units on every dimension and have the supplier mark the precise feature associated with 700 mm.
Specifications to review
Compare offers across the full specification rather than relying on a model name or product photo. A quotation should identify the main frame and panel construction, floor and roof build-up, doors and windows, finish, electrical provisions, plumbing scope where applicable, and any included furnishings. If a specification is not stated, treat it as unconfirmed rather than assuming it is included.
| Specification area | What to request | Why it matters |
|---|---|---|
| Dimensions | Folded and deployed drawings with the 700 mm reference identified | Supports transport, site, and layout checks |
| Structure and envelope | Frame, wall, roof, and floor descriptions, including stated materials | Helps assess suitability for the project and local conditions |
| Openings and layout | Door, window, partition, and service-point locations | Reduces clashes with furniture, circulation, and site connections |
| Utilities and finishes | Included electrical, plumbing, insulation, and interior finish scope | Clarifies what remains for local contractors to complete |
| Delivery and installation | Packaging, transport boundary, lifting needs, and installation responsibilities | Helps identify costs and responsibilities outside the factory scope |
Choosing a Layout for the Intended Application
The right layout depends on how people will use the building, how long they will occupy it, and what services the site can provide. Potential applications include temporary offices, staff accommodation, security rooms, and project-site facilities, subject to the selected configuration and applicable regulations. These uses are not interchangeable: accommodation may need different privacy, sanitary, ventilation, and service arrangements from an office.
Plan around workflow and services
Start with the activities inside the unit, then map entry, circulation, work or sleeping areas, storage, and utility points. Check that opening a door or deploying a wing will not obstruct an access route, adjacent structure, or required service connection. For early coordination, buyers may ask for a layout drawing at a scale such as 1:50; this is a drawing-format suggestion, not a product specification.
Review the floor plan alongside the deployed exterior dimensions and site plan. Allow for the opening path of both wings, delivery access, lifting or handling operations, drainage, and connections to local utilities. Any clearance shown in an early concept should be treated as provisional until the site team and supplier confirm the actual equipment, installation method, and local access requirements.
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Selection Framework for B2B Buyers
1. Define the project brief
Document the intended use, expected occupancy, project location, operating period, site conditions, and required completion date. Identify local requirements that may affect building approval, fire safety, accessibility, energy performance, or electrical work. The supplier can provide product information, but the buyer or project team should confirm which local approvals and inspections apply.
2. Validate dimensions and construction
Request the latest product drawings, materials schedule, and written explanation of the 700 mm designation. Confirm whether dimensions are exterior or interior and whether measurements change between transport and deployed states. Ask the supplier to identify any project-specific changes and to issue a revised drawing for approval before production.
3. Confirm scope, price, and schedule
Compare quotations on the same basis: configuration, finishes, utilities, packaging, delivery terms, installation, and exclusions. Ask for the minimum order quantity, production lead time, payment milestones, and the point at which the schedule begins. These terms depend on the project, configuration, and supplier confirmation, so avoid relying on a generic estimate when making a site or procurement commitment.
4. Agree on installation and handover
Clarify who prepares the foundation or support surface, arranges transport and lifting, deploys the wings, connects utilities, and completes any local finishing. Request an installation sequence and identify the tools, equipment, and personnel required from each party. Before handover, use an agreed checklist to verify the delivered configuration, visible finishes, operation of openings, and any included systems.
Common Buying Mistakes to Avoid
- Assuming the name is a complete specification: Ask for the 700 mm dimension reference and approved drawings.
- Comparing headline prices only: Check whether transport, installation, utility work, and requested finishes are included.
- Planning from a closed-unit photo: Verify the deployed footprint and wing-opening area against the site plan.
- Leaving local compliance until delivery: Check relevant requirements early with the responsible local professionals or authorities.
- Approving changes verbally: Record configuration, materials, dimensions, and exclusions in the quotation or approved documents.
Evaluating Supplier Support
A reliable supplier should be able to explain the specification, respond clearly to dimensional questions, and provide documents that match the quoted configuration. Ask whether the factory can support layout adjustments, finish selection, utility planning, export packing, and installation coordination, and distinguish available support from services included in the price. Request written confirmation of scope, communication responsibilities, and the process for handling drawing revisions.
Hongshun Guangju works with buyers to clarify product configuration and project requirements for expandable-house procurement. For a useful quotation, provide the intended application, destination, preferred layout, required finishes and utilities, order quantity, and target schedule. We can then discuss the appropriate specifications and identify details that need confirmation before an order is finalized.
Conclusion: What to Do Before You Order
A 700mm Double Wing Expandable House can be evaluated effectively when the buyer treats the product name as a starting point, not a complete technical specification. The first step is to confirm what 700 mm refers to, then review dimensioned folded and deployed drawings, match the layout to the intended use, and define installation and delivery responsibilities. This process helps reduce avoidable scope gaps without assuming that every configuration or site has the same requirements.
Before requesting a final offer, prepare a project brief and ask suppliers to return a written specification, drawing, itemized scope, MOQ, lead time, and list of exclusions. If you are comparing options for an upcoming project, share those requirements with Hongshun Guangju to discuss a suitable configuration and the next steps for procurement.