This is not GD.

Consider this advice to everyone who may post in the thread - in a tech forum we don't do GD style shenanigans.

Firstly I duplicated the image, then I selected the area of the house that needed color and stuck that on its own layer and desaturated it.

I used the color dropper tool to pick up the trim color, threw that on a new layer that was linked to the earlier mentioned layer below it and chose the Overlay blend mode and got this:



Try screwing around with different colors and blend modes. Make sure you have a desaturated base for the coloring area.

Keep in mind that the area's not evenly lit so it's a bit darker in the middle and lighter towards the edges. Some manual mask fiddling with exposure and such could even this out some. You could also fiddle with the exposure some and mess with contrast and other sliders to get it to go lighter or darker.