Dellah has experience in a wide variety of property-related contentious commercial property issues through negotiation, mediation or proceedings, including high value dilapidations claims, hostile lease renewals, multi-million pound development disputes, rights of light, rent review and development issues. She acted for the landlord in the most important property case of 2018, S Franses Limited v The Cavendish Hotel (London) Limited, in the Supreme Court which significantly changed the way that a landlord’s intention to redevelop (when opposing new business leases) must be interpreted by the courts. She has also recovered news agency premises for Surrey Investment Limited, for significant breaches of the lease, alongside supervising numerous lease renewal proceedings for various shopping centre owners, including CBREGi, in Colchester, Epsom and Hammersmith and Fulham.