London- and Athens-based architects Neiheiser Argyros have transformed a tired, modest semi-detached house by extending it, adding lots of glazing and playing with the floor levels.

The house in Barnes, south-west London was a mere 80 sq m when architect Xristina Argyros started on it. By the time she had finished, it was 180 sq m. ‘As it was on a corner, we were able to extend at the side and rear and get a square footprint, rather than typical rectangular shape,’ she says. ‘Wherever we could, we extended to the full envelope of the house.’ The attic floor was also extended.

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Xristina Agyros and Ryan Neiheiser are unit tutors for the Experimental 15 unit; City / Hall. Read more about the unit.