Known for their out-of-the-box concepts and styling, England-based R2 Studio recently did a makeover on an Edwardian garden house in London. And, the results are marvelous. The catch element of this makeover was the perforated ash wood staircase that connects the two stories of the building in Lewisham. The beautiful extension imparted to this old building, overlooking the River Quaggy, creates an extensive living and dining area in the ground floor while making room for extra bedrooms in the first. The newly renovated exterior is aptly covered by vertical timber batons with thin gaps that go on to amp up…