| Before purchase | Local zoning and land-use rules | Confirm that a dwelling is permitted on the parcel and check setbacks, building height, lot coverage, access, and any design or subdivision requirements. Rules differ by jurisdiction and property. | Contact the local planning or zoning office with the parcel address and a preliminary site plan. |
| Before purchase | Applicable building code and permits | Ask the local building department which adopted codes and amendments apply, what permits are required, and whether plan review or inspections are needed. | Request written guidance or a permit checklist from the building department. Do not assume a factory-built shell is exempt from local approvals. |
| Site planning | Wind, snow, seismic, and other site loads | Confirm that the design accounts for the site’s required structural loads and exposure conditions. Requirements can vary with location, elevation, terrain, and building configuration. | Provide the manufacturer and design professional with the site location and ask for project-specific structural documentation. |
| Site planning | Foundation and soil conditions | Determine the required foundation type, local frost-depth considerations, drainage needs, and whether soil conditions call for a geotechnical evaluation. The foundation must suit both the home design and the site. | Have the foundation design coordinated with the home drawings and reviewed by the appropriate local authority or design professional. |
| Site planning | Utilities, access, and site work | Check availability and connection requirements for water, sewer or septic, electricity, and other services. Confirm delivery access, crane or equipment needs, grading, and stormwater requirements. | Get site-specific estimates from utility providers and qualified local contractors before finalizing the project budget. |
| Manufacturer review | Permitting drawings and engineering | Clarify which drawings, calculations, and specifications are included, who prepares them, and whether they are suitable for the intended location and permit submission. | Request a sample drawing package and a written list of documents supplied for your project; confirm local acceptance with the building department. |
| Manufacturer review | Scope of supply and exclusions | Identify exactly what the price includes, such as the structural frame, exterior panels, windows, insulation, interior finishes, delivery, and installation. A quoted package may not include site work, foundation, utilities, or permits. | Compare itemized written proposals using the same project scope and record all exclusions, allowances, and owner-provided items. |
| Manufacturer review | Materials and building-envelope details | Review the specified steel, protective finish, panel system, insulation, air and water control details, and condensation-management approach. Suitability depends on climate, design, and installation. | Request product specifications, assembly details, and maintenance instructions rather than relying only on general marketing descriptions. |
| Manufacturer review | Factory quality control and installation | Understand how components are inspected, packaged, delivered, and assembled, and who is responsible for installation and correction of defects or damage. | Ask for the written installation sequence, responsibility matrix, delivery requirements, and process for documenting and resolving issues. |
| Manufacturer review | Schedule, payment terms, and changes | Check the proposed design, production, delivery, and installation milestones. Review deposit requirements, progress payments, cancellation terms, and how design changes affect cost and schedule. | Use a written contract with milestone dates, defined payment triggers, change-order procedures, and clear delivery and storage responsibilities. |
| Manufacturer review | Warranty and after-sales support | Read warranty coverage, exclusions, claim deadlines, and responsibilities for materials, workmanship, and installation. Confirm how service requests are handled. | Obtain the complete warranty documents before signing and keep copies of contracts, drawings, approvals, and delivery records. |
| Final comparison | Total project cost and risk | Compare the complete installed project cost, not just the advertised package price. Account for permits, design, foundation, site preparation, utilities, transport, installation, taxes, and contingency. | Build a project budget with separate line items and verify major allowances with local professionals and service providers. |