You can travel by Citylink Bus or by train from Glasgow to the ferry terminals at Gourock. Argyll and Western Ferries both serve the Dunoon area and both ferry operators have passenger facilities.
By car

Follow the M8 from Glasgow to Gourock where you can catch the Western Ferries Ferry to Dunoon. You can also drive via the A82, a very picturesque route past Loch Lomond and through the Argyll countryside. See the AA web site for a route planner.

On arrival at Dunoon using the CalMac ferry, turn right and follow coastal road for approx 1/2 mile, on passing through 2nd roundabout Sebright is 4th houses along on left hand side. On arrival at the Western Ferries terminal , turn left and follow the coastal road for approx 1 1/2 miles. Sebright is on the right, 4 houses before the first roundabout on the coastal road.

Sebright is easily located by the sign posted in its garden