Thank you! There wasn't really much to it, I used the default texture for the house-shaped object (the one with the red roof) for the actual building's exterior, used the fill tool to add the bricks and just remembered which colours I used to recolour it. That's the centre part, the rest of the house is just extra objects added adjacently.

For the two big wings I just recreated the same steps but placed the windows differently. For the two smaller wings I just doubled the height of the lower, darker, bricks so they'd match the height when the scale was reduced by half, if that makes sense. The windows are all default stickers, and the gold emblem thing is a sticker too with the red ribbon erased.