You may want to try out A-Cube Microsystems, a cleaning company that has been in service perhaps for more than 10 years. They have served thousands of clients and they offer very reasonable prices in the mid-range, not so low as for clients to suspect about quality issues while not so high as to appear as a rip off. For 5 room place, their prices are usually between 200+ to 300+, very reasonable for a one-time post-renovation or pre-move in cleaning. Besides house cleaning, they also offer other cleaning services such as carpet cleaning and office cleaning. Their websites are at www.a-cubemicrosystems.com and www.carpetcleaningsingapore.sg . Do visit both of their websites and take a look.