Bretteville-sur-Laize () is a commune in the Calvados department in the Normandy region in northwestern France.
The scene of heavy fighting following the Normandy landings, much of the town is of post-World War II construction.
The commune is made up of the following collection of villages and hamlets, Jacob Mesnil, Quilly, Le Beffeux, Les ÃÂcluses, L'Abbaye and Bretteville-sur-Laize.
The Commune with another 20 communes shares part of a 2,115 hectare, Natura 2000 conservation area, called the Vallée de l'Orne et ses affluents.
The river Laize, a tributary to the Orne, flows through the commune. In addition two streams also flow through the commune the Ruisseau de Corneville and the Ruisseau du Val Clair.
The Commune has three buildings and areas listed as a Monument historique
Bretteville-sur-Laize is twinned with: