telerneni - If you're intending to use scaffolding, of course.

daniel1 - During the first stages of constructing a house, I would say that making sure your windows are durable and won't develop cracks is the most important thing that people often miss. I recommend investing in concrete lintels. While they may appear expensive, you can get some affordably priced ones from https://www.mgnbm.co.uk/building-products/lintels/concrete-lintels/ that are high-quality and durable. Make sure to have a chat with their consultants to get the fitting lintels that you can install without any adjustments and you'll be good to go.