The appellant, a property-owning company, sued the respondent tenant for unpaid rentals and municipal charges arising from a written lease agreement concluded on 3 August 2012 in respect of commercial premises in Johannesburg. The respondent occupied the premises and paid rental until June 2014, when it vacated without notice. It later contended that the lease was void ab initio because parts of the building lacked approved building plans and no occupancy certificate had been issued as required by the National Building Regulations and Building Standards Act 103 of 1977. The high court dismissed the appellant’s claim, holding that although the lease was not invalid, it was unenforceable. The appellant appealed, and the respondent cross‑appealed.