[Home](./index.md) > [bitburner](./bitburner.md) > [OfficeAPI](./bitburner.officeapi.md) > [getOfficeSizeUpgradeCost](./bitburner.officeapi.getofficesizeupgradecost.md) ## OfficeAPI.getOfficeSizeUpgradeCost() method Get the cost to upgrade an office. **Signature:** ```typescript getOfficeSizeUpgradeCost(divisionName: string, city: CityName, size: number): number; ``` ## Parameters

Parameter	Type	Description
divisionName	string	Name of the division
city	[CityName](./bitburner.cityname.md)	Name of the city
size	number	Amount of positions to open

**Returns:** number Cost of upgrading the office ## Remarks RAM cost: 10 GB