| 1 |
Define the delivered scope |
Separate the advertised home price from transport, unloading, foundations, utility connections, permits, interior finishes, appliances, and taxes. |
15%–30%+ of the base price may be added for site and delivery-related work, depending on location and specification. |
Require an itemized inclusions and exclusions schedule, with quantities, unit prices, and responsibility for every omitted item. |
Unpriced exclusions are a common source of budget overruns and can delay occupancy if essential work is not funded. |
| 2 |
Compare transport methods |
Check folded dimensions, total shipping volume, gross weight, port handling, inland haulage, road restrictions, and final-mile access. |
International freight is commonly quoted by container, roll-on/roll-off service, or project cargo; local trucking may require route surveys or special permits. |
Confirm whether the price is port-to-port, door-to-door, or delivered to the prepared plot, and identify who pays demurrage and storage. |
Remote sites, difficult roads, crane access, port storage, and currency changes can materially increase the final logistics cost. |
| 3 |
Verify installation requirements |
Compare assembly duration, crew qualifications, lifting equipment, weather limitations, finishing work, testing, and handover procedures. |
Basic on-site assembly may take approximately 1–5 working days; foundations, services, inspections, and finishing can take several additional weeks. |
Specify the installation sequence, acceptable tolerances, weather delays, site readiness requirements, and the definition of practical completion. |
Low installation prices may exclude cranes, scaffolding, electrical testing, plumbing connections, or remedial work after inspection. |
| 4 |
Check local planning and building rules |
Confirm zoning, building permits, fire safety, energy performance, accessibility, wind and snow loads, seismic requirements, and permanent-foundation rules. |
Permit review and approvals can take from a few weeks to several months, depending on the jurisdiction and project complexity. |
Make the purchase conditional on required approvals, or clearly assign the risk if the proposed design is rejected or must be modified. |
Non-compliant construction may require expensive alterations, prevent legal occupation, or reduce resale and insurance options. |
| 5 |
Review the payment schedule |
Compare deposits, manufacturing milestones, balance payments, retention amounts, taxes, currency terms, and payment security. |
A staged structure may include a deposit, manufacturing payments, dispatch payment, installation payment, and a final retention after handover. |
Link each payment to measurable milestones, inspection rights, shipping documents, and a remedy for late or incomplete performance. |
Large advance payments increase exposure if production stops, delivery is delayed, specifications change, or the supplier becomes insolvent. |
| 6 |
Compare warranty and after-sales support |
Check structural, waterproofing, windows, mechanical, electrical, finishes, appliances, and spare-parts coverage separately. |
Warranty periods often differ by component; structural coverage is commonly longer than coverage for finishes, equipment, or consumable parts. |
Identify the governing law, claim procedure, response time, inspection costs, travel charges, exclusions, and whether labor is covered. |
Cross-border claims can involve travel, shipping, local contractors, customs duties, and long waiting periods for replacement components. |
| 7 |
Assess climate and durability |
Compare insulation, airtightness, moisture control, corrosion resistance, roof design, drainage, ventilation, and resistance to local weather loads. |
Coastal, tropical, cold, high-altitude, high-wind, and seismic locations may require upgraded materials and engineering beyond the standard model. |
Record the design assumptions for temperature, humidity, wind, snow, seismic activity, soil, and exposure; do not rely only on generic marketing specifications. |
Inadequate climate adaptation can increase heating, cooling, maintenance, mold-remediation, repainting, and component-replacement costs. |
| 8 |
Calculate total utility and operating costs |
Compare expected energy demand, water heating, heating and cooling systems, ventilation, water supply, wastewater, internet, and backup power needs. |
Annual operating costs depend more on local climate, occupancy, energy prices, equipment efficiency, and insulation than on floor area alone. |
Request tested performance data, equipment schedules, commissioning records, and a clear list of owner-supplied utility connections. |
A lower purchase price may result in higher lifetime costs if the home requires inefficient heating, cooling, or frequent equipment servicing. |
| 9 |
Include foundation and site conditions |
Compare soil testing, grading, drainage, retaining walls, foundation type, flood exposure, access roads, landscaping, and utility trenching. |
Site preparation can range from modest work on a serviced level plot to a major construction package on sloped, remote, or weak ground. |
Make responsibility for surveys, engineering, excavation, groundwater, unsuitable soil, and changes to the foundation design explicit. |
Unexpected ground conditions are difficult to price accurately before investigation and may cause substantial cost and schedule increases. |
| 10 |
Compare lifetime value, not only purchase price |
Evaluate purchase, delivery, installation, financing, insurance, taxes, maintenance, replacements, energy, resale potential, and disposal or relocation. |
Prepare a 10–20 year ownership forecast using conservative assumptions for inflation, exchange rates, maintenance, and major component replacement. |
Include change-order rules, delay damages, title and ownership terms, dispute resolution, cancellation rights, and transferability of warranties. |
A home with a higher initial price may offer better lifetime value if it has stronger durability, documented compliance, efficient systems, and dependable local support. |
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