R+2 extension with rooftop pool, Rennes

A three-level extension (R+2) with two dormers on the south and north façades to optimise the living area upstairs. On the ground floor the existing garage is kept and the extension houses a workshop and a space for a 7,500-litre tank.

On the first floor the terrace is enlarged to hold a swimming pool, set directly above the space housing the tank.