Sketch to final painting

During a short stay in Cornwall last week I did a very quick 15 minute watercolour sketch of a farmhouse belonging to some relatives, who then asked if they could have a copy.

Not wanting to give away something as shoddy as a quick sketch i thought it would be good practice to bring it up to A2 as a finished piece.

Although I'm working on a photograph for the details, the process of doing the small sketch really helps with tricky angles and issues with perspective...