Located in the opulent urban locale of Knightsbridge in Central London, House of Atreus is a semi-residential and service apartment building owned by none other than Ira Almasy. Naturally, it is warded against muggle discovery.

The penthouse floor of this six storey structure may be strictly off-limits on account of being Ira's personal offices, but all other quarters are available for long term lease or temporary stay. At a hefty price. Potential tenants typically undergo thorough background and credit checks in addition to being briefly interviewed by the formidable proprietress.

While lacking in buttons of any sort, the building elevator will generally take tenants or visitors to whichever floor they desire. Unless you haven't paid your rent - in which case you will be taken straight to the penthouse floor to await a visit from Ira or one of her 'assistants'. The elevator is mirrored. You might find that your reflected counterparts act independently of you.

House of Atreus also features a rooftop garden, not necessarily known by all but always open for discovery.

Tenants are asked to apparate directly to the building reception rather than their respective levels. The Basement floor is presently under construction and off-limits. To those in the know, it is secretly the Headquarters of Balfour Spectre's Haunting Hour.

Each floor (besides the sixth and ground) houses three apartments. The interior of the apartments vary and are not subject to the schematic below, which is provided as a general idea of floor layout and flat sizes.