Looking at this question (and your related question) , as stated for the majority of standard addresses there are no installation charges , standard being a property a few metres , or a few 10’s of metres away from the public road (where the FTTP network has been provided to ) and a dropwire connection from a pole to the property is straightforward, or the property already has a duct from the footpath , these will attract no excess construction costs as a standard installation is covered by the ISP ( so effectively free to the customer)
contrast that to someone who lives 600 metres from the road along their own private driveway, and the existing copper pair service is from a buried armoured cable installed decades ago, when BT were the only network and had a universal service obligation and it were accepted that the majority effectively subsidised the few in these type of ‘expensive’ installations …to get the new FTTP service will need either 6-8 new poles or if poles are unacceptable excavation along the driveway to install ducting , at that distance a couple of footway joint-boxes would also be needed (approximately every 200 metres ) …..this clearly is not a standard installation and the costs won’t be borne by the ISP , in these type of circumstances Openreach provide an estimate for the work (minus the contribution they are willing to make ) it’s up-to the customer if that is acceptable, if it is , the payment made and work starts , if unacceptable the order cancelled .
