Carlisle's five most expensive streets - according to Zoopla. Pictures: Google Maps/Newsquest NEW data has revealed the most expensive streets in Carlisle. It comes as the average detached property in Carlisle is estimated to cost about £253,633 but some properties in the more expensive streets can sell for more than £500,000. Using data from property experts, Zoopla, we've looked at where the most expensive streets in Carlisle are and what it would cost to buy a house there. Here are the five most expensive streets in and around Carlisle, according to ‘Zed Index’ estimates (average property value) from Zoopla. Holme Meadow, Cumwhinton, Carlisle