36 free diy dog house plans & ideas for your furry friend by jennifer poindexter if you're a dog owner and a diyer, there's no way you wouldn't want to build a beautiful dog house that will make your dog the happiest.. If you have a small-to-medium sized dog and limited yard space, then an a-frame dog house could be the diy project for you. not many dog house plans provide you with the blueprints to added insulation, ensuring that your dog will keep cool when the temperatures begin to rise.. Large dog house plans. flooring frame plans. the first step of the project is to build the frame of the floor. therefore, cut several 2