It depends on the size and type of extension. Small porches or flat roof extensions are very reasonably priced. More substantial two storey extensions can be expensive. In general, the price is roughly proportional to the amount of space you add to your home.
Garve
Garve is a village on the Black Water river, in Ross-shire, and also is in the Highland Council location of Scotland. It is positioned 5 miles (8 kilometres) northwest of Contin, on the A835, the highway to Ullapool on the west shore, near where the A832 branches off towards Achnasheen. The village is offered by the Garve train station, on the Kyle of Lochalsh Line, which crosses the A835 road on a level going across. In 1890 Garve was recommended as the starting-point of a train to Ullapool. The village has a primary school as well as hotel but no shop. The village is within the Garve as well as Area Neighborhood Council area. Garve as well as Area are served by the Garve and District Development Company, a business formed by the neighborhood during 2017.