We are aware of debate about whether architects should be undertaking this work and of the potential liability. Architects providing such valuations should always consider how they might defend their valuation under cross examination!NZIA Practice Note 3.123 has been issued on this matter, and NZACS advice is that (generally) your liability is best managed by undertaking work that you consider comfortably fits within your competency. Like every other task, it depends on your particular skills. There are some members who have experience – and perhaps formal qualifications – in estimating or valuation, and many more will have detailed costings from recent projects and could use them to build up a replacement cost estimate for something similar.The house insurance policy wording varies between insurers, and may affect how the replacement cost is built up: for example, should the estimate include inflation to the end of the policy period; inflation over (half) the rebuild period; rebuild fees; demolition costs; contingencies; retaining structures and landscape elements; cost pressures in the event of widespread devastation; GST? Even if you are able to establish how those aspects will apply, probably you should limit your input to providing the figures with appropriate explanations including that the client (not you) should discuss and resolve the final insured value with their insurer.Always file the valuation calculation and its supporting evidence.