Modular construction is one approach within the wider group described as modern methods of construction. NHBC’s guidance distinguishes modular and panelised systems from other forms of off-site manufacture. The label alone tells a buyer little about a particular home’s specification or suitability.
Identify the actual system
Ask the seller or developer for the manufacturer, system name, construction drawings and relevant approvals. Give these to the surveyor and conveyancer early. A marketing description such as factory-built should be the start of the enquiry, not the conclusion.
Check warranty and finance separately
NHBC recommends early engagement with warranty providers on innovative construction. Ask which policy applies to the completed home and what its conditions and exclusions are. Obtain the lender’s and insurer’s own assessment of the specific property rather than assuming that an accepted construction label guarantees either finance or cover.
Compare the full project
For a proposed build, ask which parts of the quotation cover manufacture, transport, foundations, site work and connections. Record exclusions and who is responsible for each stage. Do not assume a promised factory timescale is the same as the time needed to produce an occupied, completed home.
Plan for ownership
Request maintenance information and details of how repairs or alterations should be handled. Keep the technical documents with the property records. Compare the particular home with your needs and budget; this guide does not claim that modular homes are always cheaper, faster or more energy efficient than other construction.
Editorial review: 14 October 2026. This original Property Perpetuity guide replaces the imported text; the original archive publication date is retained.