networking

We are renting a house - quite an old brick house with no basement, ornate plaster ceilings, and huge brick fireplaces throughout.

When I went to get cable broadband installed this posed a problem. How could I get high-speed network access from one side of the house to other without laying cable? I'd previously set up a WLAN across the house, but although the house isn't huge, those brick chimneys took their toll, reducing signal strength across the width of the house to the point where it was slow and unreliable. As this would affect access to my main daily PC this wasn't an option.