Nice to see some architectural modelling, and great work. If I can offer some constructive criticism, to me the devil is in the details for this sort of model. While this house is nice and clean and would suit a game environment really well as it is, for added realism and to transport the model from great to awesome maybe consider adding those fiddly bits like guttering along the eaves, down-pipes, window and door frame molding, modelled weather-boards, etc. Then maybe some photographic textures with a bit of bump mapping to reduce the 'flatness' of the surfaces. Just something to think about. Also, the grass is really well done!