I used to work in the domestic gas supplies department. At that time 2002-3, as long as your property was within 20 meters public land and 20 meters private land (40 meters approx from the supply line, usually the middle of the road), you would be looking at a connection charge of approximately �260 -�350 pounds. The reason you have come againt some 'reluctance' to provide a quote is as follows: if you are not the property owner and BG provide you with a standard installation cost (as noted above) and it transpires that the nearest supply is unable to take another customer, Transco the gas network company would be required to go back to the main (which , which can literally cost thousands, depending on the distance involved). BG are covering themselves, just in case you purchase the property based on their standard installation cost and it turns out to be more. In truth, the majority of customers used to pay the fee mentioned above, but I did see some corkers. My advice to you, is to get the current owner of the property you wish to buy, to contact Transco directly (therefore cutting out the middle man - its cheaper) and ask them for a quote before you buy / put in an offer. Hope this helps.