Depends who have the bargaining power.

Telco tower and their lawyers drafted every 3 years increase 15% monthly rental fee to our office building premise.

So we agree. Coz we need the passive rental income from them. No other operator coming.

If the landlord have many demand, he can demand such. You got to nego with his lawyers/agent… see how their reaction. Also find out from neighbouring shop office rental owner of the current rental Situation there.