What are the liability issues arising out of a design for one house being repeated several times?Regrettably, a feature of such projects is that the architect may not play a significant role during construction. The leaky buildings saga has plenty of examples of different gangs of builders (with differing competence and perhaps at diverse periods) building the same design variously with and without defects.Liability exposure on residential projects is inescapable.The risk of multiple exposure is a commercial risk that should be reflected in the terms of appointment or fees, but the client may not accept your views of the level of risk! It would be prudent to at least have the opportunity to review the “first build” in anticipation that the design can be debugged and subsequent problems are confined to construction issues. Perhaps your liability could be contractually limited to the first build of each type only, with subsequent attendances solely related to specific site issues which you can individually monitor. But beware the option to gain a royalty for each design: there is the possibility that it could lead to a fresh liability each time the design is used.These are all issues that may require specific legal advice at the time of accepting appointment and quoting fees.Taking a slightly wider view: Each time you redeploy a standard detail (or specification clause), it would be reasonable to suppose that you review the suitability of that standard for that particular reuse. If it is defective, there could be multiple instances of liability exposure.