Relationship note
This guide was created for reader decision support. It contains no affiliate tracking, paid placement, or product ranking. Product examples are included only where they clarify a criterion.
Quick answer
Ask about classification, site feasibility, plans, engineering, package scope, foundation, delivery, local labor, utilities, inspections, schedule, payment, warranty, financing, and change control.
Classification and site feasibility
- What is the exact legal and construction classification of this model?
- Which state and local codes apply at my address?
- Has this exact model been reviewed against the site’s wind, snow, seismic, energy, fire, flood, and other criteria?
- Which zoning, setback, design-review, deed, community, or land-use restrictions apply?
- What survey, soils, drainage, access, utility, environmental, or hazard information is required before design?
A model offered in a state is not automatically approved on every parcel. The local authority has final control over permits and approvals in the modular path.
Design, plans, and engineering
- Which architectural, structural, mechanical, electrical, plumbing, energy, foundation, and site documents are included?
- Which professionals prepare and stamp each document for this jurisdiction?
- How many design revisions are included, and what triggers added cost?
- Which requested customizations can affect structure, code, transport, foundation, price, or schedule?
- Who owns and may use the final plans if the project stops or changes supplier?
Package and specification
- What physically arrives at the site: frame, panels, materials, modules, or completed sections?
- Which labor, equipment, fasteners, consumables, and weather protection are included?
- Are HVAC, fixtures, appliances, insulation, drywall, finishes, porches, garages, decks, and exterior work included?
- Which brands, models, grades, colors, quantities, and substitution rights control?
- What is specifically excluded, buyer-supplied, locally contracted, or not yet defined?
Foundation, utilities, and site work
- Who designs and builds the foundation, and who verifies the factory-to-foundation interface?
- Who is responsible for clearing, grading, drainage, driveway, crane pad, and restoration?
- Who coordinates water, sewer or septic, electricity, gas, communications, and final connections?
- Which temporary power, water, sanitation, storage, security, and access facilities are required?
- Who corrects an interface mismatch between plans, foundation, modules, and local trades?
Delivery and installation
- Is freight included, and what route, loads, permits, escorts, and fuel assumptions support the amount?
- What road width, grade, turning radius, bridge, overhead clearance, and staging area are required?
- Who unloads, cranes, sets, braces, connects, protects, and inventories the shipment?
- What happens if the site is not ready, access fails, weather interrupts, or materials arrive damaged or incomplete?
- Where does the supplier’s work stop and the local contractor’s work begin?
Permits, inspections, and closeout
- Who submits permits, answers comments, pays fees, and coordinates revisions?
- Which factory, transport, foundation, set, trade, and final inspections are required?
- Who owns corrections when an inspector rejects work or documents?
- What documents, certificates, manuals, warranties, and releases are delivered at closeout?
- Who obtains the certificate or approval required for occupancy?
Price, payment, and schedule
- Which amounts are fixed, estimated, allowances, unit prices, taxes, or pass-through costs?
- How long is pricing valid and what can trigger escalation or substitution?
- What deposit and progress payments are required, and what evidence supports each milestone?
- What schedule dependencies are controlled by the supplier, buyer, authority, lender, carrier, and local contractor?
- How are delays, storage, remobilization, change orders, cancellation, and refunds handled?
Warranty, insurance, financing, and disputes
- Which warranty covers factory work, materials, transport, installation, local work, and interfaces?
- Who receives a claim, how is it documented, and what exclusions or time limits apply?
- Which insurance covers the home and materials at each project stage?
- Has the lender and insurer approved this exact home, land, foundation, contract, draw schedule, title path, and responsible parties?
- Which state’s law, dispute process, venue, and contractor or professional licensing requirements govern?
Turn answers into a decision record
| Answer type | Controlling record |
|---|---|
| Included materials and labor | Itemized quote, specifications, and contract scope. |
| Design and code | Approved plans, engineering, and authority record. |
| Price and payment | Contract, schedule of values, allowances, and invoices. |
| Schedule | Dated dependency schedule with responsible parties. |
| Changes | Written change order describing cost, time, and scope. |
| Warranty | Current written warranty with claim process and exclusions. |
Bottom line
A good supplier should welcome project-specific questions and distinguish what is known from what requires site, authority, professional, or quote review. Do not reward certainty that is not supported by documents. The best time to find a scope gap is before the contract and production deposit.
How we evaluated this page
We organized common project risks into a buyer interview. This is not a substitute for local legal, design, engineering, construction, lending, insurance, tax, or inspection advice.
Read the full review methodologyEvidence trail
Sources and reference notes
Sources were checked on August 20, 2026. Product capabilities and prices can change; verify purchase-critical details directly.
- U.S. Census modular and manufactured FAQ Primary category and code-path distinction.
- U.S. Census construction-method definitions Primary modular, panelized, and precut definitions.
- Modular Home Direct FAQ Supplier example of written-scope, code, permit, pricing, delivery, and site responsibility questions.