Essentially this can vary depending on the model and the installer themselves. Insignia's 2nd generation showers can be built inside of an hour if your installer has built one before, however, it's fair to assume for a first time installer it will take between 2-3 hours. Furthermore, all our showers are sold as a DIY fit, so if you're competent at DIY there should be no reason to employ the services of a 3rd party. However, if you do, as a guide we would expect you to be charged around £250 for a corner fitting unit rising to £500 for more complicated models. It should be noted though, this is only for assembly of the shower, not remodeling the bathroom, plumbing, or fittings.