Pumpekum for 2 villaer

Hi, i would like to hage an estimate for the construction and connection of a waste water collection and pump for 2 houses (1 “tomannsbolig” and 1 single house). The tank and pump will be placed lower than one of th houses so we would like to include a non return valve (“tilbakeslags ventil”) installed on the line from the house above to the tank below. We will also require an outdoors control cabinet. Thank you.