Hi,
Landscape and building shots are hard to determine what to charge as this is not a norm for most photography work. Best to check with the agency what is the final product and target viewer for these photos. How many of the pictures will be used eventually. Ask them how they going to pay you :- by day rate, hour rate or/and by the number of picture taken or publish. Also is post processing needed and expenses included ( transport, food drinks, batteries and etc..) . It will be a different rate. Also do they want raw or just Jpeg format. Make sure you use tripod for all these shots to get the best sharpness. Give a try and see what they say.