Taylor and Russell Armstrong had been living in a rental house when filming began on The Real Housewives of Beverly Hills, RadarOnline.com is exclusively reporting.

While fellow housewives, Lisa Vanderpump and Adrienne Maloof live in mega-mansions in gated communities, the Armstrong's lived in the Bel Air Crest area of Los Angeles, which isn't Beverly Hills.

Russell's attorney, tells us: "The house was no more than $9k per month, at the most." The Bel Air Crest isn't considered as desirable as Bel Air or the 90210.