Format
Choose volumetric, panelized, foldable, or a steel-system shell only after transport and site access are known.
Alternatives guide
KeystoneGate Sourcing alternatives guide for modular buildings
This guide is a plain-language comparison of product formats and quote scopes. It is written for a buyer who started with a brand search and now needs to see what would have to be true before an alternative is acceptable. KeystoneGate Sourcing does not offer that brand’s buildings and does not rank factories on this page.
Compare Alternative OptionsA path from open choices to a decision note
Scope
Write whether the number is a shell, a delivered unit, an installed set, or a turnkey handover.
Evidence
Request drawings, loads, and the code path for the exact system, then list every deviation.
Choice
Accept an alternative only after your team signs the lines that changed from the original brief.
What to verify before an alternative is accepted
Volumetric module
TravelModule dimensions versus the transport envelope, escort rules, and the crane lift plan at the pad.
FinishWhich rooms are complete in the factory and which mate-line joints are finished on site.
Panelized package
PackHow floors, walls, and roof panels are crated, and who protects them if the set is delayed.
SiteCrew, weather exposure, and the sequence that must finish before the building is dried in.
Relocatable unit
ReuseWhether the foundation interface and skirt are designed to be removed, not only set once.
ServicesUtility quick-connects versus hard piping, and who recommissions after a move.
Standard dimensions help when your rooms fit them. A custom clear span, an unusual floor load, or a property-line fire-resistance rating pushes the quote into project-specific engineering. Keep that engineering visible. Do not treat a catalog width as approval from the authority having jurisdiction.
Comparison questions that should stay open until answered
Which specification choices are still free?
Format, interior layout, enclosure build-up, and the party who owns installation can all still move. Freeze them in the brief when you want quotations to be comparable. Leave them open only if every supplier labels the assumption.
What should be verified before you accept a substitute?
Check module or frame dimensions, design loads, thermal transmittance, the fire-resistance rating if one is required, and the document that ties those values to the supplier and the site. A substituted girt spacing or a thinner floor is a change, even if the exterior photo looks similar.
How do shell and turnkey quotes get mixed up?
The shell may stop at the structure and skin. Turnkey may add foundations, stairs, utilities, and commissioning. Put both offers on one matrix and mark missing lines instead of subtracting a guessed percentage.
Where do budget and supplier preference fit?
You may add an optional USD figure per unit or for the whole order, and a premium, mid-range, budget, or undecided preference. Those notes travel inside the requirement. They do not create a live price and they are not a verified ranking.
Bring the format choice into the form
Name the format you want quoted, the use, the destination, and the scope label. If a line is undecided, say undecided. The desk will ask factories to answer the sheet you send, including documents for that system and that jurisdiction.
- Volumetric, panelized, foldable, or steel-system shell
- Quantity of modules or buildings
- Who owns the crane, the foundation, and the utilities
Review inquiry cards if you want the product name filled in for you.