rooms of the house

Rooms of the house - 房子里的房间 (fángzi lǐ de fángjiān)

House-房子(fáng zi)
Room -房间(fáng jiān)
Living room - 客厅(kè tīng)
Kitchen - 厨房(chú fáng)
Dining room - 饭厅(fàn tīng)
Lobby - 大厅(dà tīng)
Bedroom - 卧室(wò shì)
Children’s room -儿童房(ér tóng fáng)  
Study (room) - 书房(shū fáng)
Laundry room - 洗衣房(xǐ yī fáng)
Bathroom - 浴室(yù shì)
Toilet - 厕所(cè suǒ)  
Washroom - 洗手间(xǐ shǒu jiān)

卫生间 - (wèi shēng jiān) have different meanings for bathroom, toilet/ restroom, washroom, lavatory。

Staircase- 楼梯(lóu tī)
Upstairs - 楼上(lóu shàng)
Downstairs -楼下(lóu xià)
Attic - 阁楼(gé lóu)
Basement - 地下室(dì xià shì)
Garden -花园(huā yuán)
Garage -车库(chē kù)