Hi Vin
You have raised a really good question. You rightly surmise that there is a 'new build' premium that actually means that new build houses attract a higher price than their second hand counterparts. This is simply because purchasers will pay slightly more for a brand new property, that offers the benefit of gleaming new fixtures and fittings and no maintenance together with the Buildmark warranty and insurance cover. This premium can be between 10% and 20%, so it does mean that resale value in the first year or two can be less than the purchase price. Therefore, a new build property is more about buying a home that you can move into without having to undertake any DIY, but is for living in over the medium to long term and not about a short term investment.
I hope that answers your query.