The Housing (Miscellaneous Provisions) Act 2009 (the "2009 Act") introduces major changes to the way that housing authorities provide accornmodation pursuant to its statutory obligations under the Housing Acts. A number of new schemes are introduced that will govern such matters as social and affordable housing, the lettiqg of properties, and the purchase of a tenant of his or her property in incremental payments (an incremental purchase arrangement). Tenants holding property under schemes which have been abolished, (e.g. shared ownership leases) will be unaffected, but no new arrangements will be entered into under these old schemes. This article is concerned with a new innovation of the 2009 Act, the scheme introduced in Pt 4 relating to the tenant purchase of apartments.